linux/arch/x86/kernel/cpu
Peter Zijlstra bd2b5b1284 perf_counter: More aggressive frequency adjustment
Also employ the overflow handler to adjust the frequency, this results
in a stable frequency in about 40~50 samples, instead of that many ticks.

This also means we can start sampling at a sample period of 1 without
running head-first into the throttle.

It relies on sched_clock() to accurately measure the time difference
between the overflow NMIs.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-10 16:55:26 +02:00
..
cpufreq acpi-cpufreq: fix printk typo and indentation 2009-05-29 21:26:26 -04:00
mcheck x86: MCE: make cmci_discover_lock irq-safe 2009-05-08 11:03:26 +02:00
mtrr x86: mtrr: Fix high_width computation when phys-addr is >= 44bit 2009-05-11 11:40:43 +02:00
.gitignore
addon_cpuid_features.c x86 ACPI: Add support for Always Running APIC timer 2009-04-07 18:17:51 -04:00
amd.c perf_counter, x86: remove X86_FEATURE_ARCH_PERFMON flag for AMD cpus 2009-04-29 14:51:00 +02:00
bugs_64.c
bugs.c
centaur.c x86/centaur: merge 32 & 64 bit version 2009-03-14 16:27:29 +01:00
cmpxchg.c
common.c Merge branch 'linus' into perfcounters/core 2009-06-01 10:01:39 +02:00
cpu_debug.c x86: cpu_debug remove execute permission 2009-04-09 06:34:02 +02:00
cpu.h x86: cpu/cpu.h cleanup 2009-03-23 02:06:51 +05:30
cyrix.c x86: move various CPU initialization objects into .cpuinit.rodata 2009-03-12 13:13:07 +01:00
hypervisor.c x86: hypervisor - fix sparse warnings 2008-11-23 11:11:52 +01:00
intel_cacheinfo.c Merge branch 'linus' into cpumask-for-linus 2009-03-30 23:53:32 +02:00
intel.c Merge branch 'linus' into x86/core 2009-03-28 22:27:45 +01:00
Makefile Merge branch 'linus' into perfcounters/core-v2 2009-04-06 09:02:57 +02:00
mkcapflags.pl
perf_counter.c perf_counter: More aggressive frequency adjustment 2009-06-10 16:55:26 +02:00
perfctr-watchdog.c x86: fold apic_ops into genapic 2009-02-17 12:22:20 +01:00
powerflags.c
proc.c x86: show number of core_siblings instead of thread_siblings in /proc/cpuinfo 2009-05-04 20:36:49 +02:00
transmeta.c x86: move various CPU initialization objects into .cpuinit.rodata 2009-03-12 13:13:07 +01:00
umc.c x86: move various CPU initialization objects into .cpuinit.rodata 2009-03-12 13:13:07 +01:00
vmware.c x86: vmware - fix sparse warnings 2008-11-23 11:02:36 +01:00