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00b65985fb
linux/arch/ia64/kernel
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Chen, Kenneth W 00b65985fb [IA64] relax per-cpu TLB requirement to DTC 
Instead of pinning per-cpu TLB into a DTR, use DTC.  This will free up
one TLB entry for application, or even kernel if access pattern to
per-cpu data area has high temporal locality.

Since per-cpu is mapped at the top of region 7 address, we just need to
add special case in alt_dtlb_miss.  The physical address of per-cpu data
is already conveniently stored in IA64_KR(PER_CPU_DATA).  Latency for
alt_dtlb_miss is not affected as we can hide all the latency.  It was
measured that alt_dtlb_miss handler has 23 cycles latency before and
after the patch.

The performance effect is massive for applications that put lots of tlb
pressure on CPU.  Workload environment like database online transaction
processing or application uses tera-byte of memory would benefit the most.
Measurement with industry standard database benchmark shown an upward
of 1.6% gain.  While smaller workloads like cpu, java also showing small
improvement.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-02-06 15:04:48 -08:00
..
cpufreq ACPI: replace kmalloc+memset with kzalloc 2006-12-20 16:54:54 -05:00
acpi-ext.c Pull acpi_os_free into release branch 2006-07-01 17:19:08 -04:00
acpi-processor.c fix file specification in comments 2006-10-03 23:01:26 +02:00
acpi.c [PATCH] Altix: more ACPI PRT support 2007-02-03 11:26:06 -08:00
asm-offsets.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
audit.c [PATCH] audit: AUDIT_PERM support 2006-09-11 13:32:30 -04:00
brl_emu.c
crash_dump.c [IA64] CONFIG_KEXEC/CONFIG_CRASH_DUMP permutations 2006-12-12 10:11:00 -08:00
crash.c [IA64] CONFIG_KEXEC/CONFIG_CRASH_DUMP permutations 2006-12-12 10:11:00 -08:00
cyclone.c
efi_stub.S [IA64] make efi_stub.S fit in 80 cols 2006-06-21 14:35:28 -07:00
efi.c [IA64] resolve name clash by renaming is_available_memory() 2006-12-07 13:46:12 -08:00
entry.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
entry.S [IA64] remove per-cpu ia64_phys_stacked_size_p8 2007-02-06 15:04:18 -08:00
esi_stub.S [IA64] esi-support 2006-06-21 11:19:22 -07:00
esi.c [IA64] esi-support 2006-06-21 11:19:22 -07:00
fsys.S
gate-data.S
gate.lds.S [PATCH] vDSO hash-style fix 2006-07-31 13:28:43 -07:00
gate.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
head.S [IA64] Save register stack contents on cpu start 2006-09-08 11:05:13 -07:00
ia64_ksyms.c [IA64] Need export for csum_ipv6_magic 2006-12-07 13:18:57 -08:00
init_task.c [PATCH] nsproxy: move init_nsproxy into kernel/nsproxy.c 2006-10-02 07:57:20 -07:00
iosapic.c [IA64] IA64 Kexec/kdump 2006-12-07 09:51:35 -08:00
irq_ia64.c [IA64] use generic_handle_irq() 2006-11-16 09:38:35 -08:00
irq_lsapic.c [IA64] typename -> name conversion 2006-11-16 09:38:02 -08:00
irq.c [PATCH] kexec: Avoid migration of already disabled irqs (ia64) 2007-02-03 11:26:06 -08:00
ivt.S [IA64] relax per-cpu TLB requirement to DTC 2007-02-06 15:04:48 -08:00
jprobes.S [IA64] enable trap code on slot 1 2006-12-12 12:00:55 -08:00
kprobes.c [IA64] kprobe clears qp bits for special instructions 2006-12-12 12:04:42 -08:00
machine_kexec.c [IA64] kexec/kdump: tidy up declaration of relocate_new_kernel_t 2006-12-12 10:12:08 -08:00
machvec.c IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
Makefile [IA64] CONFIG_KEXEC/CONFIG_CRASH_DUMP permutations 2006-12-12 10:11:00 -08:00
mca_asm.S [IA64] relax per-cpu TLB requirement to DTC 2007-02-06 15:04:48 -08:00
mca_drv_asm.S Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
mca_drv.c [IA64] MCA recovery: Montecito support 2006-10-31 14:30:34 -08:00
mca_drv.h [IA64] printing support for MCA/INIT 2006-09-26 14:44:37 -07:00
mca.c [IA64] CONFIG_KEXEC/CONFIG_CRASH_DUMP permutations 2006-12-12 10:11:00 -08:00
minstate.h Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
module.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
msi_ia64.c [PATCH] msi: move the ia64 code into arch/ia64 2006-10-04 07:55:29 -07:00
numa.c [PATCH] cpumask: export node_to_cpu_mask consistently 2006-10-02 07:57:17 -07:00
pal.S [IA64] reformat pal.S to fit in 80 columns, fix typos 2006-10-17 14:54:19 -07:00
palinfo.c Merge branch 'release' of master.kernel.org:/pub/scm/linux/kernel/git/aegl/linux-2.6 2006-12-07 15:39:22 -08:00
patch.c [IA64] remove per-cpu ia64_phys_stacked_size_p8 2007-02-06 15:04:18 -08:00
perfmon_default_smpl.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
perfmon_generic.h
perfmon_itanium.h
perfmon_mckinley.h
perfmon_montecito.h [IA64] sparse cleanups 2006-12-07 10:48:19 -08:00
perfmon.c [PATCH] struct path: convert ia64 2006-12-08 08:28:45 -08:00
process.c [PATCH] sched: fix bad missed wakeups in the i386, x86_64, ia64, ACPI and APM idle code 2006-12-22 08:55:51 -08:00
ptrace.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
relocate_kernel.S [IA64] IA64 Kexec/kdump 2006-12-07 09:51:35 -08:00
sal.c [IA64] move SAL_CACHE_FLUSH check later in boot 2006-10-31 14:32:10 -08:00
salinfo.c [PATCH] struct path: convert ia64 2006-12-08 08:28:45 -08:00
semaphore.c
setup.c [IA64] remove per-cpu ia64_phys_stacked_size_p8 2007-02-06 15:04:18 -08:00
sigframe.h
signal.c Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
smp.c [IA64] CONFIG_KEXEC/CONFIG_CRASH_DUMP permutations 2006-12-12 10:11:00 -08:00
smpboot.c WorkQueue: Fix up arch-specific work items where possible 2006-12-05 19:36:26 +00:00
sys_ia64.c [PATCH] IA64,sparc: local DoS with corrupted ELFs 2006-09-08 08:40:46 -07:00
time.c [IA64] - Allow IPIs in timer loop 2006-10-17 14:51:49 -07:00
topology.c [PATCH] i386: change the 'no_control' field to 'hotpluggable' in the struct cpu 2006-12-07 02:14:10 +01:00
traps.c [IA64] - Reduce overhead of FP exception logging messages 2006-12-12 11:47:09 -08:00
unaligned.c
uncached.c [PATCH] Define easier to handle GFP_THISNODE 2006-09-26 08:48:50 -07:00
unwind_decoder.c
unwind_i.h
unwind.c
vmlinux.lds.S [IA64] remove per-cpu ia64_phys_stacked_size_p8 2007-02-06 15:04:18 -08:00