Juri Lelli 52d85d7630 ftrace: Fix stddev calculation in function profiler ... When FUNCTION_GRAPH_TRACER is enabled, ftrace can profile kernel functions and print basic statistics about them. Unfortunately, running stddev calculation is wrong. This patch corrects it implementing Welford’s method: s^2 = 1 / (n * (n-1)) * (n * \Sum (x_i)^2 - (\Sum x_i)^2) . Link: http://lkml.kernel.org/r/1371031398-24048-1-git-send-email-juri.lelli@gmail.com Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Juri Lelli <juri.lelli@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>		2013-06-19 23:32:09 -04:00
..
cpu	rcu/idle: Wrap cpu-idle poll mode within rcu_idle_enter/exit	2013-05-14 17:43:29 +02:00
debug	kgdb/sysrq: fix inconstistent help message of sysrq key	2013-04-30 17:04:10 -07:00
events	perf: Factor out auxiliary events notification	2013-05-07 13:17:29 +02:00
gcov	kernel/gcov: remove depends on CONFIG_EXPERIMENTAL	2013-01-11 11:39:33 -08:00
irq	irqdomain: document the simple domain first_irq	2013-06-08 21:15:09 +01:00
power	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2013-05-02 19:40:34 -07:00
sched	Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-05-05 13:23:27 -07:00
time	Merge branch 'fortglx/3.10/time' of git://git.linaro.org/people/jstultz/linux into timers/urgent	2013-05-29 09:55:01 +02:00
trace	ftrace: Fix stddev calculation in function profiler	2013-06-19 23:32:09 -04:00
.gitignore	kernel/hz.bc: ignore.	2013-04-22 07:09:06 -07:00
Kconfig.freezer	…
Kconfig.hz	…
Kconfig.locks	locking: Adjust spin lock inlining Kconfig options	2012-09-13 17:56:13 +02:00
Kconfig.preempt	…
Makefile	We get rid of the general module prefix confusion with a binary config option,	2013-05-05 10:58:06 -07:00
acct.c	fs: Fix hang with BSD accounting on frozen filesystem	2013-05-04 14:57:58 -04:00
async.c	async: rename and redefine async_func_ptr	2013-03-12 13:59:14 -07:00
audit.c	Merge git://git.infradead.org/users/eparis/audit	2013-05-11 14:29:11 -07:00
audit.h	Merge git://git.infradead.org/users/eparis/audit	2013-05-11 14:29:11 -07:00
audit_tree.c	kernel/audit_tree.c: tree will leak memory when failure occurs in audit_trim_trees()	2013-04-29 15:54:26 -07:00
audit_watch.c	audit: catch possible NULL audit buffers	2013-01-11 14:54:55 -08:00
auditfilter.c	auditfilter.c: fix kernel-doc warnings	2013-05-24 16:22:52 -07:00
auditsc.c	audit: Make testing for a valid loginuid explicit.	2013-05-07 22:27:15 -04:00
backtracetest.c	…
bounds.c	…
capability.c	Add file_ns_capable() helper function for open-time capability checking	2013-04-14 10:06:31 -07:00
cgroup.c	cgroup: warn about mismatching options of a new mount of an existing hierarchy	2013-05-29 07:59:39 +09:00
cgroup_freezer.c	cgroup: rename ->create/post_create/pre_destroy/destroy() to ->css_alloc/online/offline/free()	2012-11-19 08:13:38 -08:00
compat.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2013-05-01 07:21:43 -07:00
configs.c	proc: Supply PDE attribute setting accessor functions	2013-05-01 17:29:18 -04:00
context_tracking.c	Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-19 18:19:48 -08:00
cpu.c	Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-02-19 19:04:55 -08:00
cpu_pm.c	…
cpuset.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-05-01 17:51:54 -07:00
crash_dump.c	…
cred.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2012-12-18 10:55:28 -08:00
delayacct.c	cputime: Use accessors to read task cputime stats	2013-01-27 19:23:31 +01:00
dma.c	…
elfcore.c	…
exec_domain.c	…
exit.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-05-01 17:51:54 -07:00
extable.c	extable: Flip the sorting message	2013-04-15 13:25:16 +02:00
fork.c	Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block	2013-05-08 11:51:05 -07:00
freezer.c	freezer: change ptrace_stop/do_signal_stop to use freezable_schedule()	2012-10-26 14:27:49 -07:00
futex.c	futex: fix kernel-doc notation and spello	2013-03-12 20:42:10 -07:00
futex_compat.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2013-02-23 18:50:11 -08:00
groups.c	…
hrtimer.c	Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-05-05 13:23:27 -07:00
hung_task.c	…
irq_work.c	Merge branch 'nohz/printk-v8' into irq/core	2013-02-05 00:48:46 +01:00
itimer.c	…
jump_label.c	jump_label: Export jump_label_rate_limit()	2012-08-06 19:00:35 +03:00
kallsyms.c	kernel: kallsyms: memory override issue, need check destination buffer length	2013-04-15 15:17:26 +09:30
kcmp.c	kcmp: include linux/ptrace.h	2012-12-20 17:40:19 -08:00
kexec.c	kexec: Use min() and min_t() to simplify logic	2013-04-30 17:04:07 -07:00
kmod.c	usermodehelper: check subprocess_info->path != NULL	2013-05-16 12:01:11 -07:00
kprobes.c	kprobes: Fix a double lock bug of kprobe_mutex	2013-04-18 08:58:38 -07:00
ksysfs.c	Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2012-12-11 18:10:49 -08:00
kthread.c	kthread: implement probe_kthread_data()	2013-04-30 17:04:02 -07:00
latencytop.c	…
lglock.c	…
lockdep.c	Merge branch 'for-3.10/drivers' of git://git.kernel.dk/linux-block	2013-05-08 11:51:05 -07:00
lockdep_internals.h	…
lockdep_proc.c	lockdep: Use KSYM_NAME_LEN'ed buffer for __get_key_name()	2012-10-24 12:39:09 +02:00
lockdep_states.h	…
modsign_certificate.S	CONFIG_SYMBOL_PREFIX: cleanup.	2013-03-15 15:09:43 +10:30
modsign_pubkey.c	keys: use keyring_alloc() to create module signing keyring	2012-12-20 17:40:21 -08:00
module-internal.h	MODSIGN: Move the magic string to the end of a module and eliminate the search	2012-10-19 17:30:40 -07:00
module.c	kmemleak: No need for scanning specific module sections	2013-05-17 09:53:36 +01:00
module_signing.c	MODSIGN: Don't use enum-type bitfields in module signature info block	2012-12-05 11:27:24 +10:30
mutex-debug.c	…
mutex-debug.h	…
mutex.c	mutex: Back out architecture specific check for negative mutex count	2013-04-19 09:33:36 +02:00
mutex.h	…
notifier.c	…
nsproxy.c	proc: Split the namespace stuff out into linux/proc_ns.h	2013-05-01 17:29:39 -04:00
padata.c	padata: use __this_cpu_read per-cpu helper	2012-12-06 17:16:23 +08:00
panic.c	tracing: Disable tracing on warning	2013-06-19 23:32:07 -04:00
params.c	params: Fix potential memory leak in add_sysfs_param()	2013-03-18 11:40:21 +00:00
pid.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-05-01 17:51:54 -07:00
pid_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-05-01 17:51:54 -07:00
posix-cpu-timers.c	posix_timers: Fix pre-condition to stop the tick on full dynticks	2013-04-22 19:59:25 +02:00
posix-timers.c	posix-timers: Remove unused variable	2013-04-18 12:51:19 +02:00
printk.c	aio: don't include aio.h in sched.h	2013-05-07 20:16:25 -07:00
profile.c	proc: Supply PDE attribute setting accessor functions	2013-05-01 17:29:18 -04:00
ptrace.c	aio: don't include aio.h in sched.h	2013-05-07 20:16:25 -07:00
range.c	x86, range: fix missing merge during add range	2013-05-17 11:49:10 -07:00
rcu.h	rcu: Provide RCU CPU stall warnings for tiny RCU	2013-01-28 22:06:21 -08:00
rcupdate.c	Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD	2013-01-28 22:25:21 -08:00
rcutiny.c	Merge branches 'doctorture.2013.01.29a', 'fixes.2013.01.26a', 'tagcb.2013.01.24a' and 'tiny.2013.01.29b' into HEAD	2013-01-28 22:25:21 -08:00
rcutiny_plugin.h	rcu: Provide RCU CPU stall warnings for tiny RCU	2013-01-28 22:06:21 -08:00
rcutorture.c	rcu: Allow rcutorture to be built at low optimization levels	2013-02-04 12:18:20 -08:00
rcutree.c	Merge commit '8700c95adb03' into timers/nohz	2013-05-02 17:54:19 +02:00
rcutree.h	Merge commit '8700c95adb03' into timers/nohz	2013-05-02 17:54:19 +02:00
rcutree_plugin.h	rcu: Don't allocate bootmem from rcu_init()	2013-05-15 10:41:12 -07:00
rcutree_trace.c	rcutrace: single_open() leaks	2013-05-05 00:16:35 -04:00
relay.c	Merge branch 'for-3.10/core' of git://git.kernel.dk/linux-block	2013-05-08 10:13:35 -07:00
res_counter.c	res_counter: return amount of charges after res_counter_uncharge()	2012-12-18 15:02:12 -08:00
resource.c	mem hotunplug: fix kfree() of bootmem memory	2013-04-29 15:54:40 -07:00
rtmutex-debug.c	sched/rt: Move rt specific bits into new header file	2013-02-07 20:51:08 +01:00
rtmutex-debug.h	…
rtmutex-tester.c	locking/rtmutex/tester: Set correct permissions on sysfs files	2013-04-10 14:48:37 +02:00
rtmutex.c	sched/rt: Move rt specific bits into new header file	2013-02-07 20:51:08 +01:00
rtmutex.h	…
rtmutex_common.h	…
rwsem.c	Revert "rw_semaphore: remove up/down_read_non_owner"	2013-03-23 15:53:52 -07:00
seccomp.c	seccomp: allow BPF_XOR based ALU instructions.	2013-03-26 11:07:19 +11:00
semaphore.c	semaphore: use `bool' type for semaphore_waiter's up	2013-04-30 17:04:08 -07:00
signal.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-05-01 14:08:52 -07:00
smp.c	kernel/smp.c: cleanups	2013-04-30 17:04:03 -07:00
smpboot.c	kthread: Prevent unpark race which puts threads on the wrong cpu	2013-04-12 14:18:43 +02:00
smpboot.h	smpboot: Provide infrastructure for percpu hotplug threads	2012-08-13 17:01:07 +02:00
softirq.c	Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-05-05 13:23:27 -07:00
spinlock.c	…
srcu.c	srcu: use ACCESS_ONCE() to access sp->completed in srcu_read_lock()	2013-02-07 15:19:36 -08:00
stacktrace.c	…
stop_machine.c	stop_machine: Mark per cpu stopper enabled early	2013-02-26 22:25:17 +01:00
sys.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal	2013-05-01 07:21:43 -07:00
sys_ni.c	unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE	2013-05-09 13:46:38 -04:00
sysctl.c	tracing: Disable tracing on warning	2013-06-19 23:32:07 -04:00
sysctl_binary.c	switch compat_sys_sysctl to COMPAT_SYSCALL_DEFINE	2013-05-09 14:53:20 -04:00
task_work.c	task_work: task_work_add() should not succeed after exit_task_work()	2012-09-13 16:47:34 +02:00
taskstats.c	taskstats: cgroupstats_user_cmd() may leak on error	2012-10-06 03:05:31 +09:00
test_kprobes.c	kernel/: rename random32() to prandom_u32()	2013-04-29 18:28:42 -07:00
time.c	timekeeping: Use inject_offset in warp_clock	2013-03-15 16:50:20 -07:00
timeconst.bc	kernel: Replace timeconst.pl with a bc script	2013-02-16 23:17:25 +01:00
timer.c	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2013-05-15 14:05:17 -07:00
tracepoint.c	Tracing updates for Linux 3.10	2013-04-29 13:55:38 -07:00
tsacct.c	cputime: Use accessors to read task cputime stats	2013-01-27 19:23:31 +01:00
uid16.c	make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect	2013-03-03 22:58:33 -05:00
up.c	…
user-return-notifier.c	hlist: drop the node parameter from iterators	2013-02-27 19:10:24 -08:00
user.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-05-01 17:51:54 -07:00
user_namespace.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2013-05-01 17:51:54 -07:00
utsname.c	proc: Split the namespace stuff out into linux/proc_ns.h	2013-05-01 17:29:39 -04:00
utsname_sysctl.c	kernel/utsname_sysctl.c: put get/get_uts() into CONFIG_PROC_SYSCTL code block	2013-02-27 19:10:22 -08:00
wait.c	propagate name change to comments in kernel source	2012-12-06 10:39:54 +01:00
watchdog.c	watchdog: Add comments to explain the watchdog_disabled variable	2013-03-14 08:24:05 +01:00
workqueue.c	workqueue: don't perform NUMA-aware allocations on offline nodes in wq_numa_init()	2013-05-15 14:24:24 -07:00
workqueue_internal.h	workqueue: include workqueue info when printing debug dump of a worker task	2013-04-30 17:04:02 -07:00