leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
35af99e646
linux/arch/x86
History
Peter Zijlstra 35af99e646 sched/clock, x86: Use a static_key for sched_clock_stable 
In order to avoid the runtime condition and variable load turn
sched_clock_stable into a static_key.

Also provide a shorter implementation of local_clock() and
cpu_clock(int) when sched_clock_stable==1.

                        MAINLINE   PRE       POST

    sched_clock_stable: 1          1         1
    (cold) sched_clock: 329841     221876    215295
    (cold) local_clock: 301773     234692    220773
    (warm) sched_clock: 38375      25602     25659
    (warm) local_clock: 100371     33265     27242
    (warm) rdtsc:       27340      24214     24208
    sched_clock_stable: 0          0         0
    (cold) sched_clock: 382634     235941    237019
    (cold) local_clock: 396890     297017    294819
    (warm) sched_clock: 38194      25233     25609
    (warm) local_clock: 143452     71234     71232
    (warm) rdtsc:       27345      24245     24243

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/n/tip-eummbdechzz37mwmpags1gjr@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-01-13 15:13:13 +01:00
..
boot x86, build: Pass in additional -mno-mmx, -mno-sse options 2013-12-09 15:52:39 -08:00
configs x86, defconfig: Add DEVTMPFS and DEVTMPFS_MOUNT to *86*_defconfig 2013-11-04 20:01:55 -08:00
crypto crypto: sha256_ssse3 - also test for BMI2 2013-10-07 14:17:10 +08:00
ia32 constify copy_siginfo_to_user{,32}() 2013-11-09 00:16:29 -05:00
include sched/clock, x86: Rewrite cyc2ns() to avoid the need to disable IRQs 2014-01-13 15:13:06 +01:00
kernel sched/clock, x86: Use a static_key for sched_clock_stable 2014-01-13 15:13:13 +01:00
kvm KVM: nVMX: Unconditionally uninit the MMU on nested vmexit 2014-01-02 11:22:14 -02:00
lguest lguest: fix GPF in guest when using gdb. 2013-09-06 08:09:28 +09:30
lib ACPI and power management updates for 3.13-rc1 2013-11-14 13:41:48 +09:00
math-emu
mm mm: numa: serialise parallel get_user_page against THP migration 2013-12-18 19:04:50 -08:00
net net: x86: bpf: don't forget to free sk_filter (v2) 2013-11-07 19:06:52 -05:00
oprofile perf: Fix arch_perf_out_copy_user default 2013-11-06 12:34:25 +01:00
pci ACPI / driver core: Store an ACPI device pointer in struct acpi_dev_node 2013-11-14 23:14:43 +01:00
platform sched/clock, x86: Rewrite cyc2ns() to avoid the need to disable IRQs 2014-01-13 15:13:06 +01:00
power x86, asmlinkage, power: Make various symbols used by the suspend asm code visible 2013-08-06 14:21:03 -07:00
realmode x86, build: Pass in additional -mno-mmx, -mno-sse options 2013-12-09 15:52:39 -08:00
syscalls sched: Add new scheduler syscalls to support an extended scheduling parameters ABI 2014-01-13 13:41:04 +01:00
tools Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-09-04 08:39:38 -07:00
um Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 2013-11-19 11:42:32 -08:00
vdso seqcount: Add lockdep functionality to seqcount/seqlock structures 2013-11-06 12:40:26 +01:00
video
xen Features: 2013-11-15 13:34:37 +09:00
.gitignore
Kbuild
Kconfig math64: Add mul_u64_u32_shr() 2013-12-11 15:52:34 +01:00
Kconfig.cpu
Kconfig.debug x86/efi: Add EFI framebuffer earlyprintk support 2013-10-28 18:09:58 +00:00
Makefile x86, build: Pass in additional -mno-mmx, -mno-sse options 2013-12-09 15:52:39 -08:00
Makefile_32.cpu
Makefile.um