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

..

irq

Revert "genirq: assert that irq handlers are indeed running in hardirq context"

2009-05-01 15:16:04 +02:00

power

PM: Do not hold dpm_list_mtx while disabling/enabling nonboot CPUs

2009-05-24 21:15:07 +02:00

time

clockevents: prevent endless loop in tick_handle_periodic()

2009-05-02 10:22:27 +02:00

trace

tracing: Append prompt in /debug/tracing/README file

2009-05-15 19:43:22 +02:00

.gitignore

…

acct.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

async.c

async: make sure independent async domains can't accidentally entangle

2009-05-24 13:38:41 -07:00

audit_tree.c

No need for crossing to mountpoint in audit_tag_tree()

2009-04-20 23:01:15 -04:00

audit.c

Audit: remove spaces from audit_log_d_path

2009-04-05 13:49:04 -04:00

audit.h

fixing audit rule ordering mess, part 1

2009-01-04 15:14:41 -05:00

auditfilter.c

inotify: use GFP_NOFS in kernel_event() to work around a lockdep false-positive

2009-05-06 16:36:09 -07:00

auditsc.c

Audit: remove spaces from audit_log_d_path

2009-04-05 13:49:04 -04:00

backtracetest.c

…

bounds.c

…

capability.c

[CVE-2009-0029] System call wrappers part 04

2009-01-14 14:15:19 +01:00

cgroup_debug.c

debug cgroup: remove unneeded cgroup_lock

2009-04-02 19:04:54 -07:00

cgroup_freezer.c

freezer_cg: disable writing freezer.state of root cgroup

2008-11-12 17:17:16 -08:00

cgroup.c

Convert obvious places to deactivate_locked_super()

2009-05-09 10:49:40 -04:00

compat.c

signals: implement sys_rt_tgsigqueueinfo

2009-04-30 19:24:24 +02:00

configs.c

…

cpu.c

cpumask: use set_cpu_active in init/main.c

2009-03-30 22:05:12 +10:30

cpuset.c

cpusets: prevent PF_THREAD_BOUND tasks from attaching to non-root cpusets

2009-04-02 19:04:57 -07:00

cred-internals.h

CRED: Inaugurate COW credentials

2008-11-14 10:39:23 +11:00

cred.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6

2009-01-09 13:59:25 -08:00

delayacct.c

schedstat: consolidate per-task cpu runtime stats

2008-12-18 13:54:01 +01:00

dma-coherent.c

dma-coherent: Restore dma_alloc_from_coherent() large alloc fall back policy.

2009-01-21 18:51:53 +09:00

dma.c

…

exec_domain.c

Get rid of indirect include of fs_struct.h

2009-03-31 23:00:27 -04:00

exit.c

perf_counter: Dynamically allocate tasks' perf_counter_context struct

2009-05-22 12:18:19 +02:00

extable.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

fork.c

perf_counter: Add fork event

2009-06-04 17:51:38 +02:00

freezer.c

freezer_cg: use thaw_process() in unfreeze_cgroup()

2008-10-30 11:38:45 -07:00

futex_compat.c

CRED: Use RCU to access another task's creds and to release a task's own creds

2008-11-14 10:39:19 +11:00

futex.c

futex: setup writeable mapping for futex ops which modify user space data

2009-05-19 23:36:52 +02:00

hrtimer.c

hrtimer: fix rq->lock inversion (again)

2009-03-31 14:52:52 +02:00

hung_task.c

softlockup: ensure the task has been switched out once

2009-02-11 11:04:16 +01:00

itimer.c

timers: split process wide cpu clocks/timers

2009-02-05 13:04:33 +01:00

kallsyms.c

Ksplice: Add functions for walking kallsyms symbols

2009-03-31 13:05:32 +10:30

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.preempt

rcu: provide RCU options on non-preempt architectures too

2008-12-25 09:31:28 +01:00

kexec.c

PM: Do not hold dpm_list_mtx while disabling/enabling nonboot CPUs

2009-05-24 21:15:07 +02:00

kfifo.c

…

kgdb.c

sysrq, intel_fb: fix sysrq g collision

2009-05-15 07:56:24 -05:00

kmod.c

kmod: Release sub_info on cred allocation failure.

2009-05-26 12:11:19 -07:00

kprobes.c

kprobes: fix to use text_mutex around arm/disarm kprobe

2009-05-08 16:23:48 -07:00

ksysfs.c

kernel/ksysfs.c:fix dependence on CONFIG_NET

2009-01-06 10:44:31 -08:00

kthread.c

kthread: move sched-realeted initialization from kthreadd context

2009-04-09 09:50:37 +09:30

latencytop.c

sched, latencytop: incorporate review feedback from Andrew Morton

2009-02-11 10:18:04 +01:00

lockdep_internals.h

lockdep: increase MAX_LOCKDEP_ENTRIES and MAX_LOCKDEP_CHAINS

2009-05-12 19:59:52 +02:00

lockdep_proc.c

lockstat: warn about disabled lock debugging

2009-02-14 23:28:28 +01:00

lockdep_states.h

lockdep: move state bit definitions around

2009-02-14 23:27:59 +01:00

lockdep.c

lockdep: more robust lockdep_map init sequence

2009-04-17 18:00:00 +02:00

Makefile

Merge commit 'v2.6.30-rc1' into perfcounters/core

2009-04-08 10:35:30 +02:00

marker.c

markers/tracpoints: fix non-modular build

2008-11-16 09:52:03 +01:00

module.c

async: Fix module loading async-work regression

2009-04-11 12:44:49 -07:00

mutex-debug.c

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex-debug.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

mutex.c

Merge branch 'core/locking' into perfcounters/core

2009-05-06 08:47:26 +02:00

mutex.h

mutex: implement adaptive spinning

2009-01-14 18:09:02 +01:00

notifier.c

Merge commit 'v2.6.28-rc6' into core/debug

2008-11-26 08:22:50 +01:00

ns_cgroup.c

cgroups: relax ns_can_attach checks to allow attaching to grandchild cgroups

2009-04-02 19:04:53 -07:00

nsproxy.c

User namespaces: set of cleanups (v2)

2008-11-24 18:57:41 -05:00

panic.c

Fix caller information for warn_slowpath_null

2009-05-16 13:41:28 -07:00

params.c

param: fix charp parameters set via sysfs

2009-03-31 13:05:30 +10:30

perf_counter.c

perf_counter: More aggressive frequency adjustment

2009-06-10 16:55:26 +02:00

pid_namespace.c

signals: zap_pid_ns_process() should use force_sig()

2009-04-02 19:04:58 -07:00

pid.c

pids: refactor vnr/nr_ns helpers to make them safe

2009-04-02 19:05:02 -07:00

pm_qos_params.c

…

posix-cpu-timers.c

kernel/posix-cpu-timers.c: fix sparse warning

2009-04-30 08:08:31 +02:00

posix-timers.c

[CVE-2009-0029] System call wrappers part 05

2009-01-14 14:15:20 +01:00

printk.c

Merge branch 'printk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 10:23:25 -07:00

profile.c

profiling: fix broken profiling regression

2009-02-10 00:50:37 +01:00

ptrace.c

ptrace: ptrace_attach: fix the usage of ->cred_exec_mutex

2009-04-27 20:30:51 +10:00

rcuclassic.c

kmemtrace, rcu: fix linux/rcutree.h and linux/rcuclassic.h dependencies

2009-04-03 12:23:02 +02:00

rcupdate.c

RCU: Don't try and predeclare inline funcs as it upsets some versions of gcc

2009-04-15 13:55:14 -07:00

rcupreempt_trace.c

"Tree RCU": scalable classic RCU implementation

2008-12-18 21:56:04 +01:00

rcupreempt.c

kmemtrace, rcu: fix rcupreempt.c data structure dependencies

2009-04-03 12:23:04 +02:00

rcutorture.c

cpumask: convert rcutorture.c

2009-03-30 22:05:16 +10:30

rcutree_trace.c

rcu: Make hierarchical RCU less IPI-happy

2009-04-14 11:31:50 +02:00

rcutree.c

rcu: Make hierarchical RCU less IPI-happy

2009-04-14 11:31:50 +02:00

rcutree.h

kmemtrace, rcu: fix rcu_tree_trace.c data structure dependencies

2009-04-03 12:23:03 +02:00

relay.c

Merge branch 'tracing-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-04-05 11:04:19 -07:00

res_counter.c

memcg: memory cgroup resource counters for hierarchy

2009-01-08 08:31:05 -08:00

resource.c

Remove 'recurse into child resources' logic from 'reserve_region_with_split()'

2009-04-18 21:44:24 -07:00

rtmutex_common.h

…

rtmutex-debug.c

…

rtmutex-debug.h

…

rtmutex-tester.c

…

rtmutex.c

locking, rtmutex.c: Documentation cleanup

2009-04-29 23:20:17 +02:00

rtmutex.h

…

rwsem.c

…

sched_clock.c

sched: Fix fallback sched_clock()'s offset when using jiffies

2009-05-09 10:08:19 +02:00

sched_cpupri.c

sched_rt: don't allocate cpumask in fastpath

2009-04-01 13:24:51 +02:00

sched_cpupri.h

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sched_debug.c

sched: remove unused fields from struct rq

2009-03-24 23:16:51 +01:00

sched_fair.c

Merge branch 'sched/urgent'; commit 'v2.6.29-rc5' into sched/core

2009-02-15 21:15:16 +01:00

sched_features.h

Merge branch 'locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2009-03-30 17:17:35 -07:00

sched_idletask.c

…

sched_rt.c

Merge commit 'v2.6.30-rc1' into sched/urgent

2009-04-08 17:26:00 +02:00

sched_stats.h

sched: remove unused fields from struct rq

2009-03-24 23:16:51 +01:00

sched.c

perf_counter: Fix cpu migration counter

2009-06-02 13:10:54 +02:00

seccomp.c

x86-64: seccomp: fix 32/64 syscall hole

2009-03-02 15:41:30 -08:00

semaphore.c

…

signal.c

signals: implement sys_rt_tgsigqueueinfo

2009-04-30 19:24:24 +02:00

slow-work.c

Delete slow-work timers properly

2009-04-24 07:47:59 -07:00

smp.c

generic-ipi: eliminate WARN_ON()s during oops/panic

2009-03-13 10:47:34 +01:00

softirq.c

kernel/softirq.c: fix sparse warning

2009-04-17 01:57:54 +02:00

softlockup.c

softlockup: decouple hung tasks check from softlockup detection

2009-01-16 14:06:04 +01:00

spinlock.c

Allow rwlocks to re-enable interrupts

2009-04-02 19:05:11 -07:00

srcu.c

…

stacktrace.c

stacktrace: provide save_stack_trace_tsk() weak alias

2008-12-25 11:44:43 +01:00

stop_machine.c

cpumask: remove cpumask_t from core

2009-03-30 22:05:17 +10:30

sys_ni.c

Merge commit 'v2.6.29-rc2' into perfcounters/core

2009-01-21 16:37:27 +01:00

sys.c

Merge branch 'linus' into perfcounters/core

2009-04-29 14:47:05 +02:00

sysctl_check.c

net: add ARP notify option for devices

2009-02-01 01:04:33 -08:00

sysctl.c

perf_counter: Generic per counter interrupt throttle

2009-05-25 21:41:12 +02:00

taskstats.c

cpumask: convert rest of files in kernel/

2009-01-01 10:12:28 +10:30

test_kprobes.c

kprobes: add tests for register_kprobes

2009-01-06 15:59:20 -08:00

time.c

[CVE-2009-0029] System call wrappers part 01

2009-01-14 14:15:18 +01:00

timeconst.pl

…

timer.c

Merge branch 'linus' into perfcounters/core

2009-04-29 14:47:05 +02:00

tracepoint.c

tracepoints: dont update zero-sized tracepoint sections

2009-03-18 19:55:00 +01:00

tsacct.c

Fix fixpoint divide exception in acct_update_integrals

2009-03-09 08:13:35 -07:00

uid16.c

[CVE-2009-0029] System call wrappers part 19

2009-01-14 14:15:26 +01:00

up.c

smp_call_function_single(): be slightly less stupid, fix #2

2009-01-12 16:04:37 +01:00

user_namespace.c

Fix recursive lock in free_uid()/free_user_ns()

2009-02-27 16:26:21 -08:00

user.c

Merge branch 'master' into next

2009-03-24 10:52:46 +11:00

utsname_sysctl.c

proc_sysctl: use CONFIG_PROC_SYSCTL around ipc and utsname proc_handlers

2009-04-02 19:05:01 -07:00

utsname.c

…

wait.c

wait: prevent exclusive waiter starvation

2009-02-05 12:56:48 -08:00

workqueue.c

work_on_cpu(): rewrite it to create a kernel thread on demand

2009-04-09 09:50:37 +09:30