forked from Minki/linux
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler updates from Ingo Molnar:
"The main scheduler changes in this cycle were:
- support Intel Turbo Boost Max Technology 3.0 (TBM3) by introducig a
notion of 'better cores', which the scheduler will prefer to
schedule single threaded workloads on. (Tim Chen, Srinivas
Pandruvada)
- enhance the handling of asymmetric capacity CPUs further (Morten
Rasmussen)
- improve/fix load handling when moving tasks between task groups
(Vincent Guittot)
- simplify and clean up the cputime code (Stanislaw Gruszka)
- improve mass fork()ed task spread a.k.a. hackbench speedup (Vincent
Guittot)
- make struct kthread kmalloc()ed and related fixes (Oleg Nesterov)
- add uaccess atomicity debugging (when using access_ok() in the
wrong context), under CONFIG_DEBUG_ATOMIC_SLEEP=y (Peter Zijlstra)
- implement various fixes, cleanups and other enhancements (Daniel
Bristot de Oliveira, Martin Schwidefsky, Rafael J. Wysocki)"
* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
sched/core: Use load_avg for selecting idlest group
sched/core: Fix find_idlest_group() for fork
kthread: Don't abuse kthread_create_on_cpu() in __kthread_create_worker()
kthread: Don't use to_live_kthread() in kthread_[un]park()
kthread: Don't use to_live_kthread() in kthread_stop()
Revert "kthread: Pin the stack via try_get_task_stack()/put_task_stack() in to_live_kthread() function"
kthread: Make struct kthread kmalloc'ed
x86/uaccess, sched/preempt: Verify access_ok() context
sched/x86: Make CONFIG_SCHED_MC_PRIO=y easier to enable
sched/x86: Change CONFIG_SCHED_ITMT to CONFIG_SCHED_MC_PRIO
x86/sched: Use #include <linux/mutex.h> instead of #include <asm/mutex.h>
cpufreq/intel_pstate: Use CPPC to get max performance
acpi/bus: Set _OSC for diverse core support
acpi/bus: Enable HWP CPPC objects
x86/sched: Add SD_ASYM_PACKING flags to x86 ITMT CPU
x86/sysctl: Add sysctl for ITMT scheduling feature
x86: Enable Intel Turbo Boost Max Technology 3.0
x86/topology: Define x86's arch_update_cpu_topology
sched: Extend scheduler's asym packing
sched/fair: Clean up the tunable parameter definitions
...
This commit is contained in:
Linus Torvalds
commit
92c020d08d
@ -513,6 +513,9 @@ config HAVE_CONTEXT_TRACKING
|
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config HAVE_VIRT_CPU_ACCOUNTING
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bool
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config ARCH_HAS_SCALED_CPUTIME
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bool
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config HAVE_VIRT_CPU_ACCOUNTING_GEN
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bool
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default y if 64BIT
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@ -68,7 +68,7 @@ void vtime_account_user(struct task_struct *tsk)
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if (ti->ac_utime) {
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delta_utime = cycle_to_cputime(ti->ac_utime);
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account_user_time(tsk, delta_utime, delta_utime);
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account_user_time(tsk, delta_utime);
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ti->ac_utime = 0;
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}
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}
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@ -112,7 +112,7 @@ void vtime_account_system(struct task_struct *tsk)
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{
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cputime_t delta = vtime_delta(tsk);
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account_system_time(tsk, 0, delta, delta);
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account_system_time(tsk, 0, delta);
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}
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EXPORT_SYMBOL_GPL(vtime_account_system);
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@ -160,6 +160,7 @@ config PPC
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select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
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select GENERIC_CPU_AUTOPROBE
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select HAVE_VIRT_CPU_ACCOUNTING
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select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
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select HAVE_ARCH_HARDENED_USERCOPY
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select HAVE_KERNEL_GZIP
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@ -46,26 +46,12 @@ extern cputime_t cputime_one_jiffy;
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* Convert cputime <-> jiffies
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*/
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extern u64 __cputime_jiffies_factor;
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DECLARE_PER_CPU(unsigned long, cputime_last_delta);
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DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
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static inline unsigned long cputime_to_jiffies(const cputime_t ct)
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{
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return mulhdu((__force u64) ct, __cputime_jiffies_factor);
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}
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/* Estimate the scaled cputime by scaling the real cputime based on
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* the last scaled to real ratio */
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static inline cputime_t cputime_to_scaled(const cputime_t ct)
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{
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if (cpu_has_feature(CPU_FTR_SPURR) &&
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__this_cpu_read(cputime_last_delta))
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return (__force u64) ct *
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__this_cpu_read(cputime_scaled_last_delta) /
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__this_cpu_read(cputime_last_delta);
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return ct;
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}
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static inline cputime_t jiffies_to_cputime(const unsigned long jif)
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{
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u64 ct;
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@ -164,8 +164,6 @@ u64 __cputime_sec_factor;
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EXPORT_SYMBOL(__cputime_sec_factor);
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u64 __cputime_clockt_factor;
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EXPORT_SYMBOL(__cputime_clockt_factor);
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DEFINE_PER_CPU(unsigned long, cputime_last_delta);
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DEFINE_PER_CPU(unsigned long, cputime_scaled_last_delta);
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cputime_t cputime_one_jiffy;
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@ -360,7 +358,8 @@ void vtime_account_system(struct task_struct *tsk)
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unsigned long delta, sys_scaled, stolen;
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delta = vtime_delta(tsk, &sys_scaled, &stolen);
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account_system_time(tsk, 0, delta, sys_scaled);
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account_system_time(tsk, 0, delta);
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tsk->stimescaled += sys_scaled;
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if (stolen)
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account_steal_time(stolen);
|
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}
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@ -393,7 +392,8 @@ void vtime_account_user(struct task_struct *tsk)
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acct->user_time = 0;
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acct->user_time_scaled = 0;
|
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acct->utime_sspurr = 0;
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account_user_time(tsk, utime, utimescaled);
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||||
account_user_time(tsk, utime);
|
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tsk->utimescaled += utimescaled;
|
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}
|
||||
|
||||
#ifdef CONFIG_PPC32
|
||||
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@ -171,6 +171,7 @@ config S390
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select SYSCTL_EXCEPTION_TRACE
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select TTY
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select VIRT_CPU_ACCOUNTING
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select ARCH_HAS_SCALED_CPUTIME
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select VIRT_TO_BUS
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select HAVE_NMI
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|
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|
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@ -137,8 +137,10 @@ static int do_account_vtime(struct task_struct *tsk, int hardirq_offset)
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user_scaled = (user_scaled * mult) / div;
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system_scaled = (system_scaled * mult) / div;
|
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}
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account_user_time(tsk, user, user_scaled);
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account_system_time(tsk, hardirq_offset, system, system_scaled);
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account_user_time(tsk, user);
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tsk->utimescaled += user_scaled;
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account_system_time(tsk, hardirq_offset, system);
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tsk->stimescaled += system_scaled;
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steal = S390_lowcore.steal_timer;
|
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if ((s64) steal > 0) {
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@ -202,7 +204,8 @@ void vtime_account_irq_enter(struct task_struct *tsk)
|
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|
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system_scaled = (system_scaled * mult) / div;
|
||||
}
|
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account_system_time(tsk, 0, system, system_scaled);
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account_system_time(tsk, 0, system);
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tsk->stimescaled += system_scaled;
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virt_timer_forward(system);
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}
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@ -939,6 +939,27 @@ config SCHED_MC
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making when dealing with multi-core CPU chips at a cost of slightly
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increased overhead in some places. If unsure say N here.
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config SCHED_MC_PRIO
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bool "CPU core priorities scheduler support"
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||||
depends on SCHED_MC && CPU_SUP_INTEL
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select X86_INTEL_PSTATE
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select CPU_FREQ
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default y
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---help---
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Intel Turbo Boost Max Technology 3.0 enabled CPUs have a
|
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core ordering determined at manufacturing time, which allows
|
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certain cores to reach higher turbo frequencies (when running
|
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single threaded workloads) than others.
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||||
|
||||
Enabling this kernel feature teaches the scheduler about
|
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the TBM3 (aka ITMT) priority order of the CPU cores and adjusts the
|
||||
scheduler's CPU selection logic accordingly, so that higher
|
||||
overall system performance can be achieved.
|
||||
|
||||
This feature will have no effect on CPUs without this feature.
|
||||
|
||||
If unsure say Y here.
|
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|
||||
source "kernel/Kconfig.preempt"
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|
||||
config UP_LATE_INIT
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@ -24,7 +24,13 @@ static __always_inline int preempt_count(void)
|
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static __always_inline void preempt_count_set(int pc)
|
||||
{
|
||||
raw_cpu_write_4(__preempt_count, pc);
|
||||
int old, new;
|
||||
|
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do {
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old = raw_cpu_read_4(__preempt_count);
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new = (old & PREEMPT_NEED_RESCHED) |
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||||
(pc & ~PREEMPT_NEED_RESCHED);
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} while (raw_cpu_cmpxchg_4(__preempt_count, old, new) != old);
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}
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|
||||
/*
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||||
@ -146,4 +146,36 @@ struct pci_bus;
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int x86_pci_root_bus_node(int bus);
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void x86_pci_root_bus_resources(int bus, struct list_head *resources);
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||||
|
||||
extern bool x86_topology_update;
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||||
|
||||
#ifdef CONFIG_SCHED_MC_PRIO
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#include <asm/percpu.h>
|
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|
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DECLARE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
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extern unsigned int __read_mostly sysctl_sched_itmt_enabled;
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|
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/* Interface to set priority of a cpu */
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||||
void sched_set_itmt_core_prio(int prio, int core_cpu);
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||||
|
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/* Interface to notify scheduler that system supports ITMT */
|
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int sched_set_itmt_support(void);
|
||||
|
||||
/* Interface to notify scheduler that system revokes ITMT support */
|
||||
void sched_clear_itmt_support(void);
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||||
|
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#else /* CONFIG_SCHED_MC_PRIO */
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||||
|
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#define sysctl_sched_itmt_enabled 0
|
||||
static inline void sched_set_itmt_core_prio(int prio, int core_cpu)
|
||||
{
|
||||
}
|
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static inline int sched_set_itmt_support(void)
|
||||
{
|
||||
return 0;
|
||||
}
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static inline void sched_clear_itmt_support(void)
|
||||
{
|
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}
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#endif /* CONFIG_SCHED_MC_PRIO */
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|
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#endif /* _ASM_X86_TOPOLOGY_H */
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|
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@ -68,6 +68,12 @@ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, un
|
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__chk_range_not_ok((unsigned long __force)(addr), size, limit); \
|
||||
})
|
||||
|
||||
#ifdef CONFIG_DEBUG_ATOMIC_SLEEP
|
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# define WARN_ON_IN_IRQ() WARN_ON_ONCE(!in_task())
|
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#else
|
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# define WARN_ON_IN_IRQ()
|
||||
#endif
|
||||
|
||||
/**
|
||||
* access_ok: - Checks if a user space pointer is valid
|
||||
* @type: Type of access: %VERIFY_READ or %VERIFY_WRITE. Note that
|
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@ -88,8 +94,11 @@ static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, un
|
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* checks that the pointer is in the user space range - after calling
|
||||
* this function, memory access functions may still return -EFAULT.
|
||||
*/
|
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#define access_ok(type, addr, size) \
|
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likely(!__range_not_ok(addr, size, user_addr_max()))
|
||||
#define access_ok(type, addr, size) \
|
||||
({ \
|
||||
WARN_ON_IN_IRQ(); \
|
||||
likely(!__range_not_ok(addr, size, user_addr_max())); \
|
||||
})
|
||||
|
||||
/*
|
||||
* These are the main single-value transfer routines. They automatically
|
||||
|
||||
@ -123,6 +123,7 @@ obj-$(CONFIG_EFI) += sysfb_efi.o
|
||||
|
||||
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o
|
||||
obj-$(CONFIG_TRACING) += tracepoint.o
|
||||
obj-$(CONFIG_SCHED_MC_PRIO) += itmt.o
|
||||
|
||||
ifdef CONFIG_FRAME_POINTER
|
||||
obj-y += unwind_frame.o
|
||||
|
||||
@ -906,14 +906,14 @@ static int apm_cpu_idle(struct cpuidle_device *dev,
|
||||
static int use_apm_idle; /* = 0 */
|
||||
static unsigned int last_jiffies; /* = 0 */
|
||||
static unsigned int last_stime; /* = 0 */
|
||||
cputime_t stime;
|
||||
cputime_t stime, utime;
|
||||
|
||||
int apm_idle_done = 0;
|
||||
unsigned int jiffies_since_last_check = jiffies - last_jiffies;
|
||||
unsigned int bucket;
|
||||
|
||||
recalc:
|
||||
task_cputime(current, NULL, &stime);
|
||||
task_cputime(current, &utime, &stime);
|
||||
if (jiffies_since_last_check > IDLE_CALC_LIMIT) {
|
||||
use_apm_idle = 0;
|
||||
} else if (jiffies_since_last_check > idle_period) {
|
||||
|
||||
215
arch/x86/kernel/itmt.c
Normal file
215
arch/x86/kernel/itmt.c
Normal file
@ -0,0 +1,215 @@
|
||||
/*
|
||||
* itmt.c: Support Intel Turbo Boost Max Technology 3.0
|
||||
*
|
||||
* (C) Copyright 2016 Intel Corporation
|
||||
* Author: Tim Chen <tim.c.chen@linux.intel.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU General Public License
|
||||
* as published by the Free Software Foundation; version 2
|
||||
* of the License.
|
||||
*
|
||||
* On platforms supporting Intel Turbo Boost Max Technology 3.0, (ITMT),
|
||||
* the maximum turbo frequencies of some cores in a CPU package may be
|
||||
* higher than for the other cores in the same package. In that case,
|
||||
* better performance can be achieved by making the scheduler prefer
|
||||
* to run tasks on the CPUs with higher max turbo frequencies.
|
||||
*
|
||||
* This file provides functions and data structures for enabling the
|
||||
* scheduler to favor scheduling on cores can be boosted to a higher
|
||||
* frequency under ITMT.
|
||||
*/
|
||||
|
||||
#include <linux/sched.h>
|
||||
#include <linux/cpumask.h>
|
||||
#include <linux/cpuset.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/sysctl.h>
|
||||
#include <linux/nodemask.h>
|
||||
|
||||
static DEFINE_MUTEX(itmt_update_mutex);
|
||||
DEFINE_PER_CPU_READ_MOSTLY(int, sched_core_priority);
|
||||
|
||||
/* Boolean to track if system has ITMT capabilities */
|
||||
static bool __read_mostly sched_itmt_capable;
|
||||
|
||||
/*
|
||||
* Boolean to control whether we want to move processes to cpu capable
|
||||
* of higher turbo frequency for cpus supporting Intel Turbo Boost Max
|
||||
* Technology 3.0.
|
||||
*
|
||||
* It can be set via /proc/sys/kernel/sched_itmt_enabled
|
||||
*/
|
||||
unsigned int __read_mostly sysctl_sched_itmt_enabled;
|
||||
|
||||
static int sched_itmt_update_handler(struct ctl_table *table, int write,
|
||||
void __user *buffer, size_t *lenp,
|
||||
loff_t *ppos)
|
||||
{
|
||||
unsigned int old_sysctl;
|
||||
int ret;
|
||||
|
||||
mutex_lock(&itmt_update_mutex);
|
||||
|
||||
if (!sched_itmt_capable) {
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
old_sysctl = sysctl_sched_itmt_enabled;
|
||||
ret = proc_dointvec_minmax(table, write, buffer, lenp, ppos);
|
||||
|
||||
if (!ret && write && old_sysctl != sysctl_sched_itmt_enabled) {
|
||||
x86_topology_update = true;
|
||||
rebuild_sched_domains();
|
||||
}
|
||||
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static unsigned int zero;
|
||||
static unsigned int one = 1;
|
||||
static struct ctl_table itmt_kern_table[] = {
|
||||
{
|
||||
.procname = "sched_itmt_enabled",
|
||||
.data = &sysctl_sched_itmt_enabled,
|
||||
.maxlen = sizeof(unsigned int),
|
||||
.mode = 0644,
|
||||
.proc_handler = sched_itmt_update_handler,
|
||||
.extra1 = &zero,
|
||||
.extra2 = &one,
|
||||
},
|
||||
{}
|
||||
};
|
||||
|
||||
static struct ctl_table itmt_root_table[] = {
|
||||
{
|
||||
.procname = "kernel",
|
||||
.mode = 0555,
|
||||
.child = itmt_kern_table,
|
||||
},
|
||||
{}
|
||||
};
|
||||
|
||||
static struct ctl_table_header *itmt_sysctl_header;
|
||||
|
||||
/**
|
||||
* sched_set_itmt_support() - Indicate platform supports ITMT
|
||||
*
|
||||
* This function is used by the OS to indicate to scheduler that the platform
|
||||
* is capable of supporting the ITMT feature.
|
||||
*
|
||||
* The current scheme has the pstate driver detects if the system
|
||||
* is ITMT capable and call sched_set_itmt_support.
|
||||
*
|
||||
* This must be done only after sched_set_itmt_core_prio
|
||||
* has been called to set the cpus' priorities.
|
||||
* It must not be called with cpu hot plug lock
|
||||
* held as we need to acquire the lock to rebuild sched domains
|
||||
* later.
|
||||
*
|
||||
* Return: 0 on success
|
||||
*/
|
||||
int sched_set_itmt_support(void)
|
||||
{
|
||||
mutex_lock(&itmt_update_mutex);
|
||||
|
||||
if (sched_itmt_capable) {
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
return 0;
|
||||
}
|
||||
|
||||
itmt_sysctl_header = register_sysctl_table(itmt_root_table);
|
||||
if (!itmt_sysctl_header) {
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
sched_itmt_capable = true;
|
||||
|
||||
sysctl_sched_itmt_enabled = 1;
|
||||
|
||||
if (sysctl_sched_itmt_enabled) {
|
||||
x86_topology_update = true;
|
||||
rebuild_sched_domains();
|
||||
}
|
||||
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* sched_clear_itmt_support() - Revoke platform's support of ITMT
|
||||
*
|
||||
* This function is used by the OS to indicate that it has
|
||||
* revoked the platform's support of ITMT feature.
|
||||
*
|
||||
* It must not be called with cpu hot plug lock
|
||||
* held as we need to acquire the lock to rebuild sched domains
|
||||
* later.
|
||||
*/
|
||||
void sched_clear_itmt_support(void)
|
||||
{
|
||||
mutex_lock(&itmt_update_mutex);
|
||||
|
||||
if (!sched_itmt_capable) {
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
return;
|
||||
}
|
||||
sched_itmt_capable = false;
|
||||
|
||||
if (itmt_sysctl_header) {
|
||||
unregister_sysctl_table(itmt_sysctl_header);
|
||||
itmt_sysctl_header = NULL;
|
||||
}
|
||||
|
||||
if (sysctl_sched_itmt_enabled) {
|
||||
/* disable sched_itmt if we are no longer ITMT capable */
|
||||
sysctl_sched_itmt_enabled = 0;
|
||||
x86_topology_update = true;
|
||||
rebuild_sched_domains();
|
||||
}
|
||||
|
||||
mutex_unlock(&itmt_update_mutex);
|
||||
}
|
||||
|
||||
int arch_asym_cpu_priority(int cpu)
|
||||
{
|
||||
return per_cpu(sched_core_priority, cpu);
|
||||
}
|
||||
|
||||
/**
|
||||
* sched_set_itmt_core_prio() - Set CPU priority based on ITMT
|
||||
* @prio: Priority of cpu core
|
||||
* @core_cpu: The cpu number associated with the core
|
||||
*
|
||||
* The pstate driver will find out the max boost frequency
|
||||
* and call this function to set a priority proportional
|
||||
* to the max boost frequency. CPU with higher boost
|
||||
* frequency will receive higher priority.
|
||||
*
|
||||
* No need to rebuild sched domain after updating
|
||||
* the CPU priorities. The sched domains have no
|
||||
* dependency on CPU priorities.
|
||||
*/
|
||||
void sched_set_itmt_core_prio(int prio, int core_cpu)
|
||||
{
|
||||
int cpu, i = 1;
|
||||
|
||||
for_each_cpu(cpu, topology_sibling_cpumask(core_cpu)) {
|
||||
int smt_prio;
|
||||
|
||||
/*
|
||||
* Ensure that the siblings are moved to the end
|
||||
* of the priority chain and only used when
|
||||
* all other high priority cpus are out of capacity.
|
||||
*/
|
||||
smt_prio = prio * smp_num_siblings / i;
|
||||
per_cpu(sched_core_priority, cpu) = smt_prio;
|
||||
i++;
|
||||
}
|
||||
}
|
||||
@ -109,6 +109,17 @@ static bool logical_packages_frozen __read_mostly;
|
||||
/* Maximum number of SMT threads on any online core */
|
||||
int __max_smt_threads __read_mostly;
|
||||
|
||||
/* Flag to indicate if a complete sched domain rebuild is required */
|
||||
bool x86_topology_update;
|
||||
|
||||
int arch_update_cpu_topology(void)
|
||||
{
|
||||
int retval = x86_topology_update;
|
||||
|
||||
x86_topology_update = false;
|
||||
return retval;
|
||||
}
|
||||
|
||||
static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip)
|
||||
{
|
||||
unsigned long flags;
|
||||
@ -471,22 +482,42 @@ static bool match_die(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
|
||||
return false;
|
||||
}
|
||||
|
||||
#if defined(CONFIG_SCHED_SMT) || defined(CONFIG_SCHED_MC)
|
||||
static inline int x86_sched_itmt_flags(void)
|
||||
{
|
||||
return sysctl_sched_itmt_enabled ? SD_ASYM_PACKING : 0;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_SCHED_MC
|
||||
static int x86_core_flags(void)
|
||||
{
|
||||
return cpu_core_flags() | x86_sched_itmt_flags();
|
||||
}
|
||||
#endif
|
||||
#ifdef CONFIG_SCHED_SMT
|
||||
static int x86_smt_flags(void)
|
||||
{
|
||||
return cpu_smt_flags() | x86_sched_itmt_flags();
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
|
||||
static struct sched_domain_topology_level x86_numa_in_package_topology[] = {
|
||||
#ifdef CONFIG_SCHED_SMT
|
||||
{ cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
|
||||
{ cpu_smt_mask, x86_smt_flags, SD_INIT_NAME(SMT) },
|
||||
#endif
|
||||
#ifdef CONFIG_SCHED_MC
|
||||
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
|
||||
{ cpu_coregroup_mask, x86_core_flags, SD_INIT_NAME(MC) },
|
||||
#endif
|
||||
{ NULL, },
|
||||
};
|
||||
|
||||
static struct sched_domain_topology_level x86_topology[] = {
|
||||
#ifdef CONFIG_SCHED_SMT
|
||||
{ cpu_smt_mask, cpu_smt_flags, SD_INIT_NAME(SMT) },
|
||||
{ cpu_smt_mask, x86_smt_flags, SD_INIT_NAME(SMT) },
|
||||
#endif
|
||||
#ifdef CONFIG_SCHED_MC
|
||||
{ cpu_coregroup_mask, cpu_core_flags, SD_INIT_NAME(MC) },
|
||||
{ cpu_coregroup_mask, x86_core_flags, SD_INIT_NAME(MC) },
|
||||
#endif
|
||||
{ cpu_cpu_mask, SD_INIT_NAME(DIE) },
|
||||
{ NULL, },
|
||||
|
||||
@ -331,6 +331,16 @@ static void acpi_bus_osc_support(void)
|
||||
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
|
||||
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
|
||||
|
||||
#ifdef CONFIG_X86
|
||||
if (boot_cpu_has(X86_FEATURE_HWP)) {
|
||||
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT;
|
||||
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (IS_ENABLED(CONFIG_SCHED_MC_PRIO))
|
||||
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_DIVERSE_HIGH_SUPPORT;
|
||||
|
||||
if (!ghes_disable)
|
||||
capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
|
||||
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
|
||||
|
||||
@ -6,6 +6,7 @@ config X86_INTEL_PSTATE
|
||||
bool "Intel P state control"
|
||||
depends on X86
|
||||
select ACPI_PROCESSOR if ACPI
|
||||
select ACPI_CPPC_LIB if X86_64 && ACPI && SCHED_MC_PRIO
|
||||
help
|
||||
This driver provides a P state for Intel core processors.
|
||||
The driver implements an internal governor and will become
|
||||
|
||||
@ -44,6 +44,7 @@
|
||||
|
||||
#ifdef CONFIG_ACPI
|
||||
#include <acpi/processor.h>
|
||||
#include <acpi/cppc_acpi.h>
|
||||
#endif
|
||||
|
||||
#define FRAC_BITS 8
|
||||
@ -379,14 +380,67 @@ static bool intel_pstate_get_ppc_enable_status(void)
|
||||
return acpi_ppc;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_ACPI_CPPC_LIB
|
||||
|
||||
/* The work item is needed to avoid CPU hotplug locking issues */
|
||||
static void intel_pstste_sched_itmt_work_fn(struct work_struct *work)
|
||||
{
|
||||
sched_set_itmt_support();
|
||||
}
|
||||
|
||||
static DECLARE_WORK(sched_itmt_work, intel_pstste_sched_itmt_work_fn);
|
||||
|
||||
static void intel_pstate_set_itmt_prio(int cpu)
|
||||
{
|
||||
struct cppc_perf_caps cppc_perf;
|
||||
static u32 max_highest_perf = 0, min_highest_perf = U32_MAX;
|
||||
int ret;
|
||||
|
||||
ret = cppc_get_perf_caps(cpu, &cppc_perf);
|
||||
if (ret)
|
||||
return;
|
||||
|
||||
/*
|
||||
* The priorities can be set regardless of whether or not
|
||||
* sched_set_itmt_support(true) has been called and it is valid to
|
||||
* update them at any time after it has been called.
|
||||
*/
|
||||
sched_set_itmt_core_prio(cppc_perf.highest_perf, cpu);
|
||||
|
||||
if (max_highest_perf <= min_highest_perf) {
|
||||
if (cppc_perf.highest_perf > max_highest_perf)
|
||||
max_highest_perf = cppc_perf.highest_perf;
|
||||
|
||||
if (cppc_perf.highest_perf < min_highest_perf)
|
||||
min_highest_perf = cppc_perf.highest_perf;
|
||||
|
||||
if (max_highest_perf > min_highest_perf) {
|
||||
/*
|
||||
* This code can be run during CPU online under the
|
||||
* CPU hotplug locks, so sched_set_itmt_support()
|
||||
* cannot be called from here. Queue up a work item
|
||||
* to invoke it.
|
||||
*/
|
||||
schedule_work(&sched_itmt_work);
|
||||
}
|
||||
}
|
||||
}
|
||||
#else
|
||||
static void intel_pstate_set_itmt_prio(int cpu)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
static void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
|
||||
{
|
||||
struct cpudata *cpu;
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
if (hwp_active)
|
||||
if (hwp_active) {
|
||||
intel_pstate_set_itmt_prio(policy->cpu);
|
||||
return;
|
||||
}
|
||||
|
||||
if (!intel_pstate_get_ppc_enable_status())
|
||||
return;
|
||||
|
||||
@ -7,7 +7,6 @@ typedef unsigned long __nocast cputime_t;
|
||||
|
||||
#define cputime_one_jiffy jiffies_to_cputime(1)
|
||||
#define cputime_to_jiffies(__ct) (__force unsigned long)(__ct)
|
||||
#define cputime_to_scaled(__ct) (__ct)
|
||||
#define jiffies_to_cputime(__hz) (__force cputime_t)(__hz)
|
||||
|
||||
typedef u64 __nocast cputime64_t;
|
||||
|
||||
@ -34,7 +34,6 @@ typedef u64 __nocast cputime64_t;
|
||||
*/
|
||||
#define cputime_to_jiffies(__ct) \
|
||||
cputime_div(__ct, NSEC_PER_SEC / HZ)
|
||||
#define cputime_to_scaled(__ct) (__ct)
|
||||
#define jiffies_to_cputime(__jif) \
|
||||
(__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
|
||||
#define cputime64_to_jiffies64(__ct) \
|
||||
|
||||
@ -469,6 +469,7 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
|
||||
#define OSC_SB_CPCV2_SUPPORT 0x00000040
|
||||
#define OSC_SB_PCLPI_SUPPORT 0x00000080
|
||||
#define OSC_SB_OSLPI_SUPPORT 0x00000100
|
||||
#define OSC_SB_CPC_DIVERSE_HIGH_SUPPORT 0x00001000
|
||||
|
||||
extern bool osc_sb_apei_support_acked;
|
||||
extern bool osc_pc_lpi_support_confirmed;
|
||||
|
||||
@ -78,8 +78,8 @@ static inline unsigned int kstat_cpu_irqs_sum(unsigned int cpu)
|
||||
return kstat_cpu(cpu).irqs_sum;
|
||||
}
|
||||
|
||||
extern void account_user_time(struct task_struct *, cputime_t, cputime_t);
|
||||
extern void account_system_time(struct task_struct *, int, cputime_t, cputime_t);
|
||||
extern void account_user_time(struct task_struct *, cputime_t);
|
||||
extern void account_system_time(struct task_struct *, int, cputime_t);
|
||||
extern void account_steal_time(cputime_t);
|
||||
extern void account_idle_time(cputime_t);
|
||||
|
||||
|
||||
@ -48,6 +48,7 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
|
||||
__k; \
|
||||
})
|
||||
|
||||
void free_kthread_struct(struct task_struct *k);
|
||||
void kthread_bind(struct task_struct *k, unsigned int cpu);
|
||||
void kthread_bind_mask(struct task_struct *k, const struct cpumask *mask);
|
||||
int kthread_stop(struct task_struct *k);
|
||||
|
||||
@ -65,19 +65,24 @@
|
||||
|
||||
/*
|
||||
* Are we doing bottom half or hardware interrupt processing?
|
||||
* Are we in a softirq context? Interrupt context?
|
||||
* in_softirq - Are we currently processing softirq or have bh disabled?
|
||||
* in_serving_softirq - Are we currently processing softirq?
|
||||
*
|
||||
* in_irq() - We're in (hard) IRQ context
|
||||
* in_softirq() - We have BH disabled, or are processing softirqs
|
||||
* in_interrupt() - We're in NMI,IRQ,SoftIRQ context or have BH disabled
|
||||
* in_serving_softirq() - We're in softirq context
|
||||
* in_nmi() - We're in NMI context
|
||||
* in_task() - We're in task context
|
||||
*
|
||||
* Note: due to the BH disabled confusion: in_softirq(),in_interrupt() really
|
||||
* should not be used in new code.
|
||||
*/
|
||||
#define in_irq() (hardirq_count())
|
||||
#define in_softirq() (softirq_count())
|
||||
#define in_interrupt() (irq_count())
|
||||
#define in_serving_softirq() (softirq_count() & SOFTIRQ_OFFSET)
|
||||
|
||||
/*
|
||||
* Are we in NMI context?
|
||||
*/
|
||||
#define in_nmi() (preempt_count() & NMI_MASK)
|
||||
#define in_nmi() (preempt_count() & NMI_MASK)
|
||||
#define in_task() (!(preempt_count() & \
|
||||
(NMI_MASK | HARDIRQ_MASK | SOFTIRQ_OFFSET)))
|
||||
|
||||
/*
|
||||
* The preempt_count offset after preempt_disable();
|
||||
|
||||
@ -262,20 +262,9 @@ extern char ___assert_task_state[1 - 2*!!(
|
||||
#define set_task_state(tsk, state_value) \
|
||||
do { \
|
||||
(tsk)->task_state_change = _THIS_IP_; \
|
||||
smp_store_mb((tsk)->state, (state_value)); \
|
||||
smp_store_mb((tsk)->state, (state_value)); \
|
||||
} while (0)
|
||||
|
||||
/*
|
||||
* set_current_state() includes a barrier so that the write of current->state
|
||||
* is correctly serialised wrt the caller's subsequent test of whether to
|
||||
* actually sleep:
|
||||
*
|
||||
* set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
* if (do_i_need_to_sleep())
|
||||
* schedule();
|
||||
*
|
||||
* If the caller does not need such serialisation then use __set_current_state()
|
||||
*/
|
||||
#define __set_current_state(state_value) \
|
||||
do { \
|
||||
current->task_state_change = _THIS_IP_; \
|
||||
@ -284,11 +273,19 @@ extern char ___assert_task_state[1 - 2*!!(
|
||||
#define set_current_state(state_value) \
|
||||
do { \
|
||||
current->task_state_change = _THIS_IP_; \
|
||||
smp_store_mb(current->state, (state_value)); \
|
||||
smp_store_mb(current->state, (state_value)); \
|
||||
} while (0)
|
||||
|
||||
#else
|
||||
|
||||
/*
|
||||
* @tsk had better be current, or you get to keep the pieces.
|
||||
*
|
||||
* The only reason is that computing current can be more expensive than
|
||||
* using a pointer that's already available.
|
||||
*
|
||||
* Therefore, see set_current_state().
|
||||
*/
|
||||
#define __set_task_state(tsk, state_value) \
|
||||
do { (tsk)->state = (state_value); } while (0)
|
||||
#define set_task_state(tsk, state_value) \
|
||||
@ -299,11 +296,34 @@ extern char ___assert_task_state[1 - 2*!!(
|
||||
* is correctly serialised wrt the caller's subsequent test of whether to
|
||||
* actually sleep:
|
||||
*
|
||||
* for (;;) {
|
||||
* set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
* if (do_i_need_to_sleep())
|
||||
* schedule();
|
||||
* if (!need_sleep)
|
||||
* break;
|
||||
*
|
||||
* If the caller does not need such serialisation then use __set_current_state()
|
||||
* schedule();
|
||||
* }
|
||||
* __set_current_state(TASK_RUNNING);
|
||||
*
|
||||
* If the caller does not need such serialisation (because, for instance, the
|
||||
* condition test and condition change and wakeup are under the same lock) then
|
||||
* use __set_current_state().
|
||||
*
|
||||
* The above is typically ordered against the wakeup, which does:
|
||||
*
|
||||
* need_sleep = false;
|
||||
* wake_up_state(p, TASK_UNINTERRUPTIBLE);
|
||||
*
|
||||
* Where wake_up_state() (and all other wakeup primitives) imply enough
|
||||
* barriers to order the store of the variable against wakeup.
|
||||
*
|
||||
* Wakeup will do: if (@state & p->state) p->state = TASK_RUNNING, that is,
|
||||
* once it observes the TASK_UNINTERRUPTIBLE store the waking CPU can issue a
|
||||
* TASK_RUNNING store which can collide with __set_current_state(TASK_RUNNING).
|
||||
*
|
||||
* This is obviously fine, since they both store the exact same value.
|
||||
*
|
||||
* Also see the comments of try_to_wake_up().
|
||||
*/
|
||||
#define __set_current_state(state_value) \
|
||||
do { current->state = (state_value); } while (0)
|
||||
@ -1057,6 +1077,8 @@ static inline int cpu_numa_flags(void)
|
||||
}
|
||||
#endif
|
||||
|
||||
extern int arch_asym_cpu_priority(int cpu);
|
||||
|
||||
struct sched_domain_attr {
|
||||
int relax_domain_level;
|
||||
};
|
||||
@ -1627,7 +1649,10 @@ struct task_struct {
|
||||
int __user *set_child_tid; /* CLONE_CHILD_SETTID */
|
||||
int __user *clear_child_tid; /* CLONE_CHILD_CLEARTID */
|
||||
|
||||
cputime_t utime, stime, utimescaled, stimescaled;
|
||||
cputime_t utime, stime;
|
||||
#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
|
||||
cputime_t utimescaled, stimescaled;
|
||||
#endif
|
||||
cputime_t gtime;
|
||||
struct prev_cputime prev_cputime;
|
||||
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
|
||||
@ -2220,27 +2245,13 @@ struct task_struct *try_get_task_struct(struct task_struct **ptask);
|
||||
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
|
||||
extern void task_cputime(struct task_struct *t,
|
||||
cputime_t *utime, cputime_t *stime);
|
||||
extern void task_cputime_scaled(struct task_struct *t,
|
||||
cputime_t *utimescaled, cputime_t *stimescaled);
|
||||
extern cputime_t task_gtime(struct task_struct *t);
|
||||
#else
|
||||
static inline void task_cputime(struct task_struct *t,
|
||||
cputime_t *utime, cputime_t *stime)
|
||||
{
|
||||
if (utime)
|
||||
*utime = t->utime;
|
||||
if (stime)
|
||||
*stime = t->stime;
|
||||
}
|
||||
|
||||
static inline void task_cputime_scaled(struct task_struct *t,
|
||||
cputime_t *utimescaled,
|
||||
cputime_t *stimescaled)
|
||||
{
|
||||
if (utimescaled)
|
||||
*utimescaled = t->utimescaled;
|
||||
if (stimescaled)
|
||||
*stimescaled = t->stimescaled;
|
||||
*utime = t->utime;
|
||||
*stime = t->stime;
|
||||
}
|
||||
|
||||
static inline cputime_t task_gtime(struct task_struct *t)
|
||||
@ -2248,6 +2259,24 @@ static inline cputime_t task_gtime(struct task_struct *t)
|
||||
return t->gtime;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
|
||||
static inline void task_cputime_scaled(struct task_struct *t,
|
||||
cputime_t *utimescaled,
|
||||
cputime_t *stimescaled)
|
||||
{
|
||||
*utimescaled = t->utimescaled;
|
||||
*stimescaled = t->stimescaled;
|
||||
}
|
||||
#else
|
||||
static inline void task_cputime_scaled(struct task_struct *t,
|
||||
cputime_t *utimescaled,
|
||||
cputime_t *stimescaled)
|
||||
{
|
||||
task_cputime(t, utimescaled, stimescaled);
|
||||
}
|
||||
#endif
|
||||
|
||||
extern void task_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st);
|
||||
extern void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime_t *st);
|
||||
|
||||
|
||||
@ -36,7 +36,6 @@ extern unsigned int sysctl_numa_balancing_scan_size;
|
||||
extern unsigned int sysctl_sched_migration_cost;
|
||||
extern unsigned int sysctl_sched_nr_migrate;
|
||||
extern unsigned int sysctl_sched_time_avg;
|
||||
extern unsigned int sysctl_sched_shares_window;
|
||||
|
||||
int sched_proc_update_handler(struct ctl_table *table, int write,
|
||||
void __user *buffer, size_t *length,
|
||||
|
||||
@ -354,6 +354,8 @@ void free_task(struct task_struct *tsk)
|
||||
ftrace_graph_exit_task(tsk);
|
||||
put_seccomp_filter(tsk);
|
||||
arch_release_task_struct(tsk);
|
||||
if (tsk->flags & PF_KTHREAD)
|
||||
free_kthread_struct(tsk);
|
||||
free_task_struct(tsk);
|
||||
}
|
||||
EXPORT_SYMBOL(free_task);
|
||||
@ -1551,7 +1553,9 @@ static __latent_entropy struct task_struct *copy_process(
|
||||
init_sigpending(&p->pending);
|
||||
|
||||
p->utime = p->stime = p->gtime = 0;
|
||||
#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
|
||||
p->utimescaled = p->stimescaled = 0;
|
||||
#endif
|
||||
prev_cputime_init(&p->prev_cputime);
|
||||
|
||||
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
|
||||
|
||||
142
kernel/kthread.c
142
kernel/kthread.c
@ -53,20 +53,29 @@ enum KTHREAD_BITS {
|
||||
KTHREAD_IS_PARKED,
|
||||
};
|
||||
|
||||
#define __to_kthread(vfork) \
|
||||
container_of(vfork, struct kthread, exited)
|
||||
static inline void set_kthread_struct(void *kthread)
|
||||
{
|
||||
/*
|
||||
* We abuse ->set_child_tid to avoid the new member and because it
|
||||
* can't be wrongly copied by copy_process(). We also rely on fact
|
||||
* that the caller can't exec, so PF_KTHREAD can't be cleared.
|
||||
*/
|
||||
current->set_child_tid = (__force void __user *)kthread;
|
||||
}
|
||||
|
||||
static inline struct kthread *to_kthread(struct task_struct *k)
|
||||
{
|
||||
return __to_kthread(k->vfork_done);
|
||||
WARN_ON(!(k->flags & PF_KTHREAD));
|
||||
return (__force void *)k->set_child_tid;
|
||||
}
|
||||
|
||||
static struct kthread *to_live_kthread(struct task_struct *k)
|
||||
void free_kthread_struct(struct task_struct *k)
|
||||
{
|
||||
struct completion *vfork = ACCESS_ONCE(k->vfork_done);
|
||||
if (likely(vfork) && try_get_task_stack(k))
|
||||
return __to_kthread(vfork);
|
||||
return NULL;
|
||||
/*
|
||||
* Can be NULL if this kthread was created by kernel_thread()
|
||||
* or if kmalloc() in kthread() failed.
|
||||
*/
|
||||
kfree(to_kthread(k));
|
||||
}
|
||||
|
||||
/**
|
||||
@ -181,14 +190,11 @@ static int kthread(void *_create)
|
||||
int (*threadfn)(void *data) = create->threadfn;
|
||||
void *data = create->data;
|
||||
struct completion *done;
|
||||
struct kthread self;
|
||||
struct kthread *self;
|
||||
int ret;
|
||||
|
||||
self.flags = 0;
|
||||
self.data = data;
|
||||
init_completion(&self.exited);
|
||||
init_completion(&self.parked);
|
||||
current->vfork_done = &self.exited;
|
||||
self = kmalloc(sizeof(*self), GFP_KERNEL);
|
||||
set_kthread_struct(self);
|
||||
|
||||
/* If user was SIGKILLed, I release the structure. */
|
||||
done = xchg(&create->done, NULL);
|
||||
@ -196,6 +202,19 @@ static int kthread(void *_create)
|
||||
kfree(create);
|
||||
do_exit(-EINTR);
|
||||
}
|
||||
|
||||
if (!self) {
|
||||
create->result = ERR_PTR(-ENOMEM);
|
||||
complete(done);
|
||||
do_exit(-ENOMEM);
|
||||
}
|
||||
|
||||
self->flags = 0;
|
||||
self->data = data;
|
||||
init_completion(&self->exited);
|
||||
init_completion(&self->parked);
|
||||
current->vfork_done = &self->exited;
|
||||
|
||||
/* OK, tell user we're spawned, wait for stop or wakeup */
|
||||
__set_current_state(TASK_UNINTERRUPTIBLE);
|
||||
create->result = current;
|
||||
@ -203,12 +222,10 @@ static int kthread(void *_create)
|
||||
schedule();
|
||||
|
||||
ret = -EINTR;
|
||||
|
||||
if (!test_bit(KTHREAD_SHOULD_STOP, &self.flags)) {
|
||||
__kthread_parkme(&self);
|
||||
if (!test_bit(KTHREAD_SHOULD_STOP, &self->flags)) {
|
||||
__kthread_parkme(self);
|
||||
ret = threadfn(data);
|
||||
}
|
||||
/* we can't just return, we must preserve "self" on stack */
|
||||
do_exit(ret);
|
||||
}
|
||||
|
||||
@ -409,8 +426,18 @@ struct task_struct *kthread_create_on_cpu(int (*threadfn)(void *data),
|
||||
return p;
|
||||
}
|
||||
|
||||
static void __kthread_unpark(struct task_struct *k, struct kthread *kthread)
|
||||
/**
|
||||
* kthread_unpark - unpark a thread created by kthread_create().
|
||||
* @k: thread created by kthread_create().
|
||||
*
|
||||
* Sets kthread_should_park() for @k to return false, wakes it, and
|
||||
* waits for it to return. If the thread is marked percpu then its
|
||||
* bound to the cpu again.
|
||||
*/
|
||||
void kthread_unpark(struct task_struct *k)
|
||||
{
|
||||
struct kthread *kthread = to_kthread(k);
|
||||
|
||||
clear_bit(KTHREAD_SHOULD_PARK, &kthread->flags);
|
||||
/*
|
||||
* We clear the IS_PARKED bit here as we don't wait
|
||||
@ -428,24 +455,6 @@ static void __kthread_unpark(struct task_struct *k, struct kthread *kthread)
|
||||
wake_up_state(k, TASK_PARKED);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* kthread_unpark - unpark a thread created by kthread_create().
|
||||
* @k: thread created by kthread_create().
|
||||
*
|
||||
* Sets kthread_should_park() for @k to return false, wakes it, and
|
||||
* waits for it to return. If the thread is marked percpu then its
|
||||
* bound to the cpu again.
|
||||
*/
|
||||
void kthread_unpark(struct task_struct *k)
|
||||
{
|
||||
struct kthread *kthread = to_live_kthread(k);
|
||||
|
||||
if (kthread) {
|
||||
__kthread_unpark(k, kthread);
|
||||
put_task_stack(k);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(kthread_unpark);
|
||||
|
||||
/**
|
||||
@ -462,21 +471,20 @@ EXPORT_SYMBOL_GPL(kthread_unpark);
|
||||
*/
|
||||
int kthread_park(struct task_struct *k)
|
||||
{
|
||||
struct kthread *kthread = to_live_kthread(k);
|
||||
int ret = -ENOSYS;
|
||||
struct kthread *kthread = to_kthread(k);
|
||||
|
||||
if (kthread) {
|
||||
if (!test_bit(KTHREAD_IS_PARKED, &kthread->flags)) {
|
||||
set_bit(KTHREAD_SHOULD_PARK, &kthread->flags);
|
||||
if (k != current) {
|
||||
wake_up_process(k);
|
||||
wait_for_completion(&kthread->parked);
|
||||
}
|
||||
if (WARN_ON(k->flags & PF_EXITING))
|
||||
return -ENOSYS;
|
||||
|
||||
if (!test_bit(KTHREAD_IS_PARKED, &kthread->flags)) {
|
||||
set_bit(KTHREAD_SHOULD_PARK, &kthread->flags);
|
||||
if (k != current) {
|
||||
wake_up_process(k);
|
||||
wait_for_completion(&kthread->parked);
|
||||
}
|
||||
put_task_stack(k);
|
||||
ret = 0;
|
||||
}
|
||||
return ret;
|
||||
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(kthread_park);
|
||||
|
||||
@ -503,14 +511,11 @@ int kthread_stop(struct task_struct *k)
|
||||
trace_sched_kthread_stop(k);
|
||||
|
||||
get_task_struct(k);
|
||||
kthread = to_live_kthread(k);
|
||||
if (kthread) {
|
||||
set_bit(KTHREAD_SHOULD_STOP, &kthread->flags);
|
||||
__kthread_unpark(k, kthread);
|
||||
wake_up_process(k);
|
||||
wait_for_completion(&kthread->exited);
|
||||
put_task_stack(k);
|
||||
}
|
||||
kthread = to_kthread(k);
|
||||
set_bit(KTHREAD_SHOULD_STOP, &kthread->flags);
|
||||
kthread_unpark(k);
|
||||
wake_up_process(k);
|
||||
wait_for_completion(&kthread->exited);
|
||||
ret = k->exit_code;
|
||||
put_task_struct(k);
|
||||
|
||||
@ -636,6 +641,7 @@ __kthread_create_worker(int cpu, unsigned int flags,
|
||||
{
|
||||
struct kthread_worker *worker;
|
||||
struct task_struct *task;
|
||||
int node = -1;
|
||||
|
||||
worker = kzalloc(sizeof(*worker), GFP_KERNEL);
|
||||
if (!worker)
|
||||
@ -643,25 +649,17 @@ __kthread_create_worker(int cpu, unsigned int flags,
|
||||
|
||||
kthread_init_worker(worker);
|
||||
|
||||
if (cpu >= 0) {
|
||||
char name[TASK_COMM_LEN];
|
||||
|
||||
/*
|
||||
* kthread_create_worker_on_cpu() allows to pass a generic
|
||||
* namefmt in compare with kthread_create_on_cpu. We need
|
||||
* to format it here.
|
||||
*/
|
||||
vsnprintf(name, sizeof(name), namefmt, args);
|
||||
task = kthread_create_on_cpu(kthread_worker_fn, worker,
|
||||
cpu, name);
|
||||
} else {
|
||||
task = __kthread_create_on_node(kthread_worker_fn, worker,
|
||||
-1, namefmt, args);
|
||||
}
|
||||
if (cpu >= 0)
|
||||
node = cpu_to_node(cpu);
|
||||
|
||||
task = __kthread_create_on_node(kthread_worker_fn, worker,
|
||||
node, namefmt, args);
|
||||
if (IS_ERR(task))
|
||||
goto fail_task;
|
||||
|
||||
if (cpu >= 0)
|
||||
kthread_bind(task, cpu);
|
||||
|
||||
worker->flags = flags;
|
||||
worker->task = task;
|
||||
wake_up_process(task);
|
||||
|
||||
@ -1995,14 +1995,15 @@ static void ttwu_queue(struct task_struct *p, int cpu, int wake_flags)
|
||||
* @state: the mask of task states that can be woken
|
||||
* @wake_flags: wake modifier flags (WF_*)
|
||||
*
|
||||
* Put it on the run-queue if it's not already there. The "current"
|
||||
* thread is always on the run-queue (except when the actual
|
||||
* re-schedule is in progress), and as such you're allowed to do
|
||||
* the simpler "current->state = TASK_RUNNING" to mark yourself
|
||||
* runnable without the overhead of this.
|
||||
* If (@state & @p->state) @p->state = TASK_RUNNING.
|
||||
*
|
||||
* Return: %true if @p was woken up, %false if it was already running.
|
||||
* or @state didn't match @p's state.
|
||||
* If the task was not queued/runnable, also place it back on a runqueue.
|
||||
*
|
||||
* Atomic against schedule() which would dequeue a task, also see
|
||||
* set_current_state().
|
||||
*
|
||||
* Return: %true if @p->state changes (an actual wakeup was done),
|
||||
* %false otherwise.
|
||||
*/
|
||||
static int
|
||||
try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags)
|
||||
@ -5707,7 +5708,7 @@ static int sched_domain_debug_one(struct sched_domain *sd, int cpu, int level,
|
||||
printk(KERN_CONT " %*pbl",
|
||||
cpumask_pr_args(sched_group_cpus(group)));
|
||||
if (group->sgc->capacity != SCHED_CAPACITY_SCALE) {
|
||||
printk(KERN_CONT " (cpu_capacity = %d)",
|
||||
printk(KERN_CONT " (cpu_capacity = %lu)",
|
||||
group->sgc->capacity);
|
||||
}
|
||||
|
||||
@ -6184,6 +6185,7 @@ build_overlap_sched_groups(struct sched_domain *sd, int cpu)
|
||||
* die on a /0 trap.
|
||||
*/
|
||||
sg->sgc->capacity = SCHED_CAPACITY_SCALE * cpumask_weight(sg_span);
|
||||
sg->sgc->min_capacity = SCHED_CAPACITY_SCALE;
|
||||
|
||||
/*
|
||||
* Make sure the first group of this domain contains the
|
||||
@ -6301,7 +6303,22 @@ static void init_sched_groups_capacity(int cpu, struct sched_domain *sd)
|
||||
WARN_ON(!sg);
|
||||
|
||||
do {
|
||||
int cpu, max_cpu = -1;
|
||||
|
||||
sg->group_weight = cpumask_weight(sched_group_cpus(sg));
|
||||
|
||||
if (!(sd->flags & SD_ASYM_PACKING))
|
||||
goto next;
|
||||
|
||||
for_each_cpu(cpu, sched_group_cpus(sg)) {
|
||||
if (max_cpu < 0)
|
||||
max_cpu = cpu;
|
||||
else if (sched_asym_prefer(cpu, max_cpu))
|
||||
max_cpu = cpu;
|
||||
}
|
||||
sg->asym_prefer_cpu = max_cpu;
|
||||
|
||||
next:
|
||||
sg = sg->next;
|
||||
} while (sg != sd->groups);
|
||||
|
||||
@ -7602,6 +7619,7 @@ void __init sched_init(void)
|
||||
#ifdef CONFIG_FAIR_GROUP_SCHED
|
||||
root_task_group.shares = ROOT_TASK_GROUP_LOAD;
|
||||
INIT_LIST_HEAD(&rq->leaf_cfs_rq_list);
|
||||
rq->tmp_alone_branch = &rq->leaf_cfs_rq_list;
|
||||
/*
|
||||
* How much cpu bandwidth does root_task_group get?
|
||||
*
|
||||
|
||||
@ -297,7 +297,7 @@ static int cpuacct_stats_show(struct seq_file *sf, void *v)
|
||||
for (stat = 0; stat < CPUACCT_STAT_NSTATS; stat++) {
|
||||
seq_printf(sf, "%s %lld\n",
|
||||
cpuacct_stat_desc[stat],
|
||||
cputime64_to_clock_t(val[stat]));
|
||||
(long long)cputime64_to_clock_t(val[stat]));
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
@ -128,16 +128,13 @@ static inline void task_group_account_field(struct task_struct *p, int index,
|
||||
* Account user cpu time to a process.
|
||||
* @p: the process that the cpu time gets accounted to
|
||||
* @cputime: the cpu time spent in user space since the last update
|
||||
* @cputime_scaled: cputime scaled by cpu frequency
|
||||
*/
|
||||
void account_user_time(struct task_struct *p, cputime_t cputime,
|
||||
cputime_t cputime_scaled)
|
||||
void account_user_time(struct task_struct *p, cputime_t cputime)
|
||||
{
|
||||
int index;
|
||||
|
||||
/* Add user time to process. */
|
||||
p->utime += cputime;
|
||||
p->utimescaled += cputime_scaled;
|
||||
account_group_user_time(p, cputime);
|
||||
|
||||
index = (task_nice(p) > 0) ? CPUTIME_NICE : CPUTIME_USER;
|
||||
@ -153,16 +150,13 @@ void account_user_time(struct task_struct *p, cputime_t cputime,
|
||||
* Account guest cpu time to a process.
|
||||
* @p: the process that the cpu time gets accounted to
|
||||
* @cputime: the cpu time spent in virtual machine since the last update
|
||||
* @cputime_scaled: cputime scaled by cpu frequency
|
||||
*/
|
||||
static void account_guest_time(struct task_struct *p, cputime_t cputime,
|
||||
cputime_t cputime_scaled)
|
||||
static void account_guest_time(struct task_struct *p, cputime_t cputime)
|
||||
{
|
||||
u64 *cpustat = kcpustat_this_cpu->cpustat;
|
||||
|
||||
/* Add guest time to process. */
|
||||
p->utime += cputime;
|
||||
p->utimescaled += cputime_scaled;
|
||||
account_group_user_time(p, cputime);
|
||||
p->gtime += cputime;
|
||||
|
||||
@ -180,16 +174,13 @@ static void account_guest_time(struct task_struct *p, cputime_t cputime,
|
||||
* Account system cpu time to a process and desired cpustat field
|
||||
* @p: the process that the cpu time gets accounted to
|
||||
* @cputime: the cpu time spent in kernel space since the last update
|
||||
* @cputime_scaled: cputime scaled by cpu frequency
|
||||
* @target_cputime64: pointer to cpustat field that has to be updated
|
||||
* @index: pointer to cpustat field that has to be updated
|
||||
*/
|
||||
static inline
|
||||
void __account_system_time(struct task_struct *p, cputime_t cputime,
|
||||
cputime_t cputime_scaled, int index)
|
||||
void __account_system_time(struct task_struct *p, cputime_t cputime, int index)
|
||||
{
|
||||
/* Add system time to process. */
|
||||
p->stime += cputime;
|
||||
p->stimescaled += cputime_scaled;
|
||||
account_group_system_time(p, cputime);
|
||||
|
||||
/* Add system time to cpustat. */
|
||||
@ -204,15 +195,14 @@ void __account_system_time(struct task_struct *p, cputime_t cputime,
|
||||
* @p: the process that the cpu time gets accounted to
|
||||
* @hardirq_offset: the offset to subtract from hardirq_count()
|
||||
* @cputime: the cpu time spent in kernel space since the last update
|
||||
* @cputime_scaled: cputime scaled by cpu frequency
|
||||
*/
|
||||
void account_system_time(struct task_struct *p, int hardirq_offset,
|
||||
cputime_t cputime, cputime_t cputime_scaled)
|
||||
cputime_t cputime)
|
||||
{
|
||||
int index;
|
||||
|
||||
if ((p->flags & PF_VCPU) && (irq_count() - hardirq_offset == 0)) {
|
||||
account_guest_time(p, cputime, cputime_scaled);
|
||||
account_guest_time(p, cputime);
|
||||
return;
|
||||
}
|
||||
|
||||
@ -223,7 +213,7 @@ void account_system_time(struct task_struct *p, int hardirq_offset,
|
||||
else
|
||||
index = CPUTIME_SYSTEM;
|
||||
|
||||
__account_system_time(p, cputime, cputime_scaled, index);
|
||||
__account_system_time(p, cputime, index);
|
||||
}
|
||||
|
||||
/*
|
||||
@ -390,7 +380,7 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
|
||||
struct rq *rq, int ticks)
|
||||
{
|
||||
u64 cputime = (__force u64) cputime_one_jiffy * ticks;
|
||||
cputime_t scaled, other;
|
||||
cputime_t other;
|
||||
|
||||
/*
|
||||
* When returning from idle, many ticks can get accounted at
|
||||
@ -403,7 +393,6 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
|
||||
if (other >= cputime)
|
||||
return;
|
||||
cputime -= other;
|
||||
scaled = cputime_to_scaled(cputime);
|
||||
|
||||
if (this_cpu_ksoftirqd() == p) {
|
||||
/*
|
||||
@ -411,15 +400,15 @@ static void irqtime_account_process_tick(struct task_struct *p, int user_tick,
|
||||
* So, we have to handle it separately here.
|
||||
* Also, p->stime needs to be updated for ksoftirqd.
|
||||
*/
|
||||
__account_system_time(p, cputime, scaled, CPUTIME_SOFTIRQ);
|
||||
__account_system_time(p, cputime, CPUTIME_SOFTIRQ);
|
||||
} else if (user_tick) {
|
||||
account_user_time(p, cputime, scaled);
|
||||
account_user_time(p, cputime);
|
||||
} else if (p == rq->idle) {
|
||||
account_idle_time(cputime);
|
||||
} else if (p->flags & PF_VCPU) { /* System time or guest time */
|
||||
account_guest_time(p, cputime, scaled);
|
||||
account_guest_time(p, cputime);
|
||||
} else {
|
||||
__account_system_time(p, cputime, scaled, CPUTIME_SYSTEM);
|
||||
__account_system_time(p, cputime, CPUTIME_SYSTEM);
|
||||
}
|
||||
}
|
||||
|
||||
@ -502,7 +491,7 @@ void thread_group_cputime_adjusted(struct task_struct *p, cputime_t *ut, cputime
|
||||
*/
|
||||
void account_process_tick(struct task_struct *p, int user_tick)
|
||||
{
|
||||
cputime_t cputime, scaled, steal;
|
||||
cputime_t cputime, steal;
|
||||
struct rq *rq = this_rq();
|
||||
|
||||
if (vtime_accounting_cpu_enabled())
|
||||
@ -520,12 +509,11 @@ void account_process_tick(struct task_struct *p, int user_tick)
|
||||
return;
|
||||
|
||||
cputime -= steal;
|
||||
scaled = cputime_to_scaled(cputime);
|
||||
|
||||
if (user_tick)
|
||||
account_user_time(p, cputime, scaled);
|
||||
account_user_time(p, cputime);
|
||||
else if ((p != rq->idle) || (irq_count() != HARDIRQ_OFFSET))
|
||||
account_system_time(p, HARDIRQ_OFFSET, cputime, scaled);
|
||||
account_system_time(p, HARDIRQ_OFFSET, cputime);
|
||||
else
|
||||
account_idle_time(cputime);
|
||||
}
|
||||
@ -746,7 +734,7 @@ static void __vtime_account_system(struct task_struct *tsk)
|
||||
{
|
||||
cputime_t delta_cpu = get_vtime_delta(tsk);
|
||||
|
||||
account_system_time(tsk, irq_count(), delta_cpu, cputime_to_scaled(delta_cpu));
|
||||
account_system_time(tsk, irq_count(), delta_cpu);
|
||||
}
|
||||
|
||||
void vtime_account_system(struct task_struct *tsk)
|
||||
@ -767,7 +755,7 @@ void vtime_account_user(struct task_struct *tsk)
|
||||
tsk->vtime_snap_whence = VTIME_SYS;
|
||||
if (vtime_delta(tsk)) {
|
||||
delta_cpu = get_vtime_delta(tsk);
|
||||
account_user_time(tsk, delta_cpu, cputime_to_scaled(delta_cpu));
|
||||
account_user_time(tsk, delta_cpu);
|
||||
}
|
||||
write_seqcount_end(&tsk->vtime_seqcount);
|
||||
}
|
||||
@ -863,29 +851,25 @@ cputime_t task_gtime(struct task_struct *t)
|
||||
* add up the pending nohz execution time since the last
|
||||
* cputime snapshot.
|
||||
*/
|
||||
static void
|
||||
fetch_task_cputime(struct task_struct *t,
|
||||
cputime_t *u_dst, cputime_t *s_dst,
|
||||
cputime_t *u_src, cputime_t *s_src,
|
||||
cputime_t *udelta, cputime_t *sdelta)
|
||||
void task_cputime(struct task_struct *t, cputime_t *utime, cputime_t *stime)
|
||||
{
|
||||
cputime_t delta;
|
||||
unsigned int seq;
|
||||
unsigned long long delta;
|
||||
|
||||
if (!vtime_accounting_enabled()) {
|
||||
*utime = t->utime;
|
||||
*stime = t->stime;
|
||||
return;
|
||||
}
|
||||
|
||||
do {
|
||||
*udelta = 0;
|
||||
*sdelta = 0;
|
||||
|
||||
seq = read_seqcount_begin(&t->vtime_seqcount);
|
||||
|
||||
if (u_dst)
|
||||
*u_dst = *u_src;
|
||||
if (s_dst)
|
||||
*s_dst = *s_src;
|
||||
*utime = t->utime;
|
||||
*stime = t->stime;
|
||||
|
||||
/* Task is sleeping, nothing to add */
|
||||
if (t->vtime_snap_whence == VTIME_INACTIVE ||
|
||||
is_idle_task(t))
|
||||
if (t->vtime_snap_whence == VTIME_INACTIVE || is_idle_task(t))
|
||||
continue;
|
||||
|
||||
delta = vtime_delta(t);
|
||||
@ -894,54 +878,10 @@ fetch_task_cputime(struct task_struct *t,
|
||||
* Task runs either in user or kernel space, add pending nohz time to
|
||||
* the right place.
|
||||
*/
|
||||
if (t->vtime_snap_whence == VTIME_USER || t->flags & PF_VCPU) {
|
||||
*udelta = delta;
|
||||
} else {
|
||||
if (t->vtime_snap_whence == VTIME_SYS)
|
||||
*sdelta = delta;
|
||||
}
|
||||
if (t->vtime_snap_whence == VTIME_USER || t->flags & PF_VCPU)
|
||||
*utime += delta;
|
||||
else if (t->vtime_snap_whence == VTIME_SYS)
|
||||
*stime += delta;
|
||||
} while (read_seqcount_retry(&t->vtime_seqcount, seq));
|
||||
}
|
||||
|
||||
|
||||
void task_cputime(struct task_struct *t, cputime_t *utime, cputime_t *stime)
|
||||
{
|
||||
cputime_t udelta, sdelta;
|
||||
|
||||
if (!vtime_accounting_enabled()) {
|
||||
if (utime)
|
||||
*utime = t->utime;
|
||||
if (stime)
|
||||
*stime = t->stime;
|
||||
return;
|
||||
}
|
||||
|
||||
fetch_task_cputime(t, utime, stime, &t->utime,
|
||||
&t->stime, &udelta, &sdelta);
|
||||
if (utime)
|
||||
*utime += udelta;
|
||||
if (stime)
|
||||
*stime += sdelta;
|
||||
}
|
||||
|
||||
void task_cputime_scaled(struct task_struct *t,
|
||||
cputime_t *utimescaled, cputime_t *stimescaled)
|
||||
{
|
||||
cputime_t udelta, sdelta;
|
||||
|
||||
if (!vtime_accounting_enabled()) {
|
||||
if (utimescaled)
|
||||
*utimescaled = t->utimescaled;
|
||||
if (stimescaled)
|
||||
*stimescaled = t->stimescaled;
|
||||
return;
|
||||
}
|
||||
|
||||
fetch_task_cputime(t, utimescaled, stimescaled,
|
||||
&t->utimescaled, &t->stimescaled, &udelta, &sdelta);
|
||||
if (utimescaled)
|
||||
*utimescaled += cputime_to_scaled(udelta);
|
||||
if (stimescaled)
|
||||
*stimescaled += cputime_to_scaled(sdelta);
|
||||
}
|
||||
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_GEN */
|
||||
|
||||
@ -586,7 +586,7 @@ static enum hrtimer_restart dl_task_timer(struct hrtimer *timer)
|
||||
|
||||
/*
|
||||
* The task might have changed its scheduling policy to something
|
||||
* different than SCHED_DEADLINE (through switched_fromd_dl()).
|
||||
* different than SCHED_DEADLINE (through switched_from_dl()).
|
||||
*/
|
||||
if (!dl_task(p)) {
|
||||
__dl_clear_params(p);
|
||||
@ -1137,7 +1137,7 @@ pick_next_task_dl(struct rq *rq, struct task_struct *prev, struct pin_cookie coo
|
||||
pull_dl_task(rq);
|
||||
lockdep_repin_lock(&rq->lock, cookie);
|
||||
/*
|
||||
* pull_rt_task() can drop (and re-acquire) rq->lock; this
|
||||
* pull_dl_task() can drop (and re-acquire) rq->lock; this
|
||||
* means a stop task can slip in, in which case we need to
|
||||
* re-start task selection.
|
||||
*/
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@ -404,6 +404,7 @@ struct cfs_rq {
|
||||
unsigned long runnable_load_avg;
|
||||
#ifdef CONFIG_FAIR_GROUP_SCHED
|
||||
unsigned long tg_load_avg_contrib;
|
||||
unsigned long propagate_avg;
|
||||
#endif
|
||||
atomic_long_t removed_load_avg, removed_util_avg;
|
||||
#ifndef CONFIG_64BIT
|
||||
@ -539,6 +540,11 @@ struct dl_rq {
|
||||
|
||||
#ifdef CONFIG_SMP
|
||||
|
||||
static inline bool sched_asym_prefer(int a, int b)
|
||||
{
|
||||
return arch_asym_cpu_priority(a) > arch_asym_cpu_priority(b);
|
||||
}
|
||||
|
||||
/*
|
||||
* We add the notion of a root-domain which will be used to define per-domain
|
||||
* variables. Each exclusive cpuset essentially defines an island domain by
|
||||
@ -623,6 +629,7 @@ struct rq {
|
||||
#ifdef CONFIG_FAIR_GROUP_SCHED
|
||||
/* list of leaf cfs_rq on this cpu: */
|
||||
struct list_head leaf_cfs_rq_list;
|
||||
struct list_head *tmp_alone_branch;
|
||||
#endif /* CONFIG_FAIR_GROUP_SCHED */
|
||||
|
||||
/*
|
||||
@ -892,7 +899,8 @@ struct sched_group_capacity {
|
||||
* CPU capacity of this group, SCHED_CAPACITY_SCALE being max capacity
|
||||
* for a single CPU.
|
||||
*/
|
||||
unsigned int capacity;
|
||||
unsigned long capacity;
|
||||
unsigned long min_capacity; /* Min per-CPU capacity in group */
|
||||
unsigned long next_update;
|
||||
int imbalance; /* XXX unrelated to capacity but shared group state */
|
||||
|
||||
@ -905,6 +913,7 @@ struct sched_group {
|
||||
|
||||
unsigned int group_weight;
|
||||
struct sched_group_capacity *sgc;
|
||||
int asym_prefer_cpu; /* cpu of highest priority in group */
|
||||
|
||||
/*
|
||||
* The CPUs this group covers.
|
||||
|
||||
@ -347,13 +347,6 @@ static struct ctl_table kern_table[] = {
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
},
|
||||
{
|
||||
.procname = "sched_shares_window_ns",
|
||||
.data = &sysctl_sched_shares_window,
|
||||
.maxlen = sizeof(unsigned int),
|
||||
.mode = 0644,
|
||||
.proc_handler = proc_dointvec,
|
||||
},
|
||||
#ifdef CONFIG_SCHEDSTATS
|
||||
{
|
||||
.procname = "sched_schedstats",
|
||||
|
||||
@ -133,9 +133,9 @@ static inline unsigned long long prof_ticks(struct task_struct *p)
|
||||
}
|
||||
static inline unsigned long long virt_ticks(struct task_struct *p)
|
||||
{
|
||||
cputime_t utime;
|
||||
cputime_t utime, stime;
|
||||
|
||||
task_cputime(p, &utime, NULL);
|
||||
task_cputime(p, &utime, &stime);
|
||||
|
||||
return cputime_to_expires(utime);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user