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b83a46e7da
linux/arch/x86/kernel/cpu
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Peter Zijlstra b83a46e7da perf, x86: Don't reset the LBR as frequently 
If we reset the LBR on each first counter, simple counter rotation which
first deschedules all counters and then reschedules the new ones will
lead to LBR reset, even though we're still in the same task context.

Reduce this by not flushing on the first counter but only flushing on
different task contexts.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: paulus@samba.org
Cc: eranian@google.com
Cc: robert.richter@amd.com
Cc: fweisbec@gmail.com
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2010-03-10 13:23:38 +01:00
..
cpufreq Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2010-03-07 12:52:38 -08:00
mcheck sysfs: Use sysfs_attr_init and sysfs_bin_attr_init on dynamic attributes 2010-03-07 17:04:51 -08:00
mtrr x86: fix mtrr missing kernel-doc 2010-03-05 11:46:03 -08:00
.gitignore
addon_cpuid_features.c x86, cpu: Print AMD virtualization features in /proc/cpuinfo 2010-02-13 15:04:40 -08:00
amd.c x86, amd: Get multi-node CPU info from NodeId MSR instead of PCI config space 2009-12-16 15:06:23 -08:00
bugs_64.c x86/cpu: Clean up various files a bit 2009-07-11 11:24:09 +02:00
bugs.c x86/cpu: Clean up various files a bit 2009-07-11 11:24:09 +02:00
centaur.c x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
cmpxchg.c
common.c Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-12-14 12:36:46 -08:00
cpu.h x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
cyrix.c x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
hypervisor.c x86: Move tsc_calibration to x86_init_ops 2009-08-31 09:35:47 +02:00
intel_cacheinfo.c Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
intel.c x86: Reenable TSC sync check at boot, even with NONSTOP_TSC 2009-12-17 14:44:35 -08:00
Makefile x86: Remove "x86 CPU features in debugfs" (CONFIG_X86_CPU_DEBUG) 2010-01-23 18:27:47 -08:00
mkcapflags.pl
perf_event_amd.c perf, x86: Use unlocked bitops 2010-03-10 13:22:29 +01:00
perf_event_intel_ds.c perf, x86: Fix silly bug in intel_pmu_pebs_{enable,disable} 2010-03-10 13:23:38 +01:00
perf_event_intel_lbr.c perf, x86: Don't reset the LBR as frequently 2010-03-10 13:23:38 +01:00
perf_event_intel.c perf, x86: Reorder intel_pmu_enable_all() 2010-03-10 13:23:37 +01:00
perf_event_p6.c perf, x86: Change x86_pmu.{enable,disable} calling convention 2010-03-10 13:22:28 +01:00
perf_event.c perf, x86: Disable PEBS on clovertown chips 2010-03-10 13:23:35 +01:00
perfctr-watchdog.c perf, x86: rename macro in ARCH_PERFMON_EVENTSEL_ENABLE 2010-03-01 14:21:23 +01:00
powerflags.c
proc.c Merge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2009-09-14 07:57:32 -07:00
sched.c sched: x86: Name old_perf in a unique way 2009-09-16 11:21:07 +02:00
transmeta.c x86, cpu: mv display_cacheinfo -> cpu_detect_cache_sizes 2009-11-23 11:59:53 -08:00
umc.c x86: move various CPU initialization objects into .cpuinit.rodata 2009-03-12 13:13:07 +01:00
vmware.c x86: Print the hypervisor returned tsc_khz during boot 2009-09-20 20:25:36 +02:00