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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 Update .gitignore files for generated targets 2008-10-20 11:24:31 -07:00
Makefile x86: Remove "x86 CPU features in debugfs" (CONFIG_X86_CPU_DEBUG) 2010-01-23 18:27:47 -08:00
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.c x86/cpu: Clean up various files a bit 2009-07-11 11:24:09 +02:00
bugs_64.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 x86: move cmpxchg fallbacks to a generic place 2008-08-18 16:05:47 +02:00
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.c x86: Reenable TSC sync check at boot, even with NONSTOP_TSC 2009-12-17 14:44:35 -08:00
intel_cacheinfo.c Driver core: Constify struct sysfs_ops in struct kobj_type 2010-03-07 17:04:49 -08:00
mkcapflags.pl x86: generate names for /proc/cpuinfo from <asm/cpufeature.h> 2008-08-27 19:23:22 -07:00
perf_event.c perf, x86: Disable PEBS on clovertown chips 2010-03-10 13:23:35 +01:00
perf_event_amd.c perf, x86: Use unlocked bitops 2010-03-10 13:22:29 +01:00
perf_event_intel.c perf, x86: Reorder intel_pmu_enable_all() 2010-03-10 13:23:37 +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_p6.c perf, x86: Change x86_pmu.{enable,disable} calling convention 2010-03-10 13:22:28 +01:00
perfctr-watchdog.c perf, x86: rename macro in ARCH_PERFMON_EVENTSEL_ENABLE 2010-03-01 14:21:23 +01:00
powerflags.c x86: generate names for /proc/cpuinfo from <asm/cpufeature.h> 2008-08-27 19:23:22 -07:00
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