Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Steven Rostedt ea4e2bc4d9 ftrace: graph of a single function ... This patch adds the file: /debugfs/tracing/set_graph_function which can be used along with the function graph tracer. When this file is empty, the function graph tracer will act as usual. When the file has a function in it, the function graph tracer will only trace that function. For example: # echo blk_unplug > /debugfs/tracing/set_graph_function # cat /debugfs/tracing/trace [...] ------------------------------------------ | 2) make-19003 => kjournald-2219 ------------------------------------------ 2) | blk_unplug() { 2) | dm_unplug_all() { 2) | dm_get_table() { 2) 1.381 us | _read_lock(); 2) 0.911 us | dm_table_get(); 2) 1. 76 us | _read_unlock(); 2) + 12.912 us | } 2) | dm_table_unplug_all() { 2) | blk_unplug() { 2) 0.778 us | generic_unplug_device(); 2) 2.409 us | } 2) 5.992 us | } 2) 0.813 us | dm_table_put(); 2) + 29. 90 us | } 2) + 34.532 us | } You can add up to 32 functions into this file. Currently we limit it to 32, but this may change with later improvements. To add another function, use the append '>>': # echo sys_read >> /debugfs/tracing/set_graph_function # cat /debugfs/tracing/set_graph_function blk_unplug sys_read Using the '>' will clear out the function and write anew: # echo sys_write > /debug/tracing/set_graph_function # cat /debug/tracing/set_graph_function sys_write Note, if you have function graph running while doing this, the small time between clearing it and updating it will cause the graph to record all functions. This should not be an issue because after it sets the filter, only those functions will be recorded from then on. If you need to only record a particular function then set this file first before starting the function graph tracer. In the future this side effect may be corrected. The set_graph_function file is similar to the set_ftrace_filter but it does not take wild cards nor does it allow for more than one function to be set with a single write. There is no technical reason why this is the case, I just do not have the time yet to implement that. Note, dynamic ftrace must be enabled for this to appear because it uses the dynamic ftrace records to match the name to the mcount call sites. Signed-off-by: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>		2008-12-04 09:09:34 +01:00
..
irq	genirq: __irq_set_trigger: change pr_warning to pr_debug	2008-11-13 11:59:48 +01:00
power	tracing: allow tracing of suspend/resume & hibernation code again	2008-11-23 10:48:44 +01:00
time	nohz: disable tick_nohz_kick_tick() for now	2008-11-10 22:39:27 +01:00
trace	ftrace: graph of a single function	2008-12-04 09:09:34 +01:00
.gitignore
acct.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
audit.c	[PATCH] Fix the bug of using AUDIT_STATUS_RATE_LIMIT when set fail, no error output.	2008-08-01 12:15:16 -04:00
audit.h
audit_tree.c	Fix inotify watch removal/umount races	2008-11-15 12:26:44 -08:00
auditfilter.c	Fix inotify watch removal/umount races	2008-11-15 12:26:44 -08:00
auditsc.c	tty: Fix abusers of current->sighand->tty	2008-10-13 09:51:42 -07:00
backtracetest.c	backtrace: replace timer with tasklet + completions	2008-06-27 18:09:16 +02:00
bounds.c
capability.c	security: Fix setting of PF_SUPERPRIV by __capable()	2008-08-14 22:59:43 +10:00
cgroup.c	cgroups: fix a serious bug in cgroupstats	2008-11-19 18:50:00 -08:00
cgroup_debug.c	cgroups: fix probable race with put_css_set[_taskexit] and find_css_set	2008-10-20 08:52:38 -07:00
cgroup_freezer.c	freezer_cg: disable writing freezer.state of root cgroup	2008-11-12 17:17:16 -08:00
compat.c	Merge branches 'timers/clocksource', 'timers/hrtimers', 'timers/nohz', 'timers/ntp', 'timers/posixtimers' and 'timers/debug' into v28-timers-for-linus	2008-10-20 13:14:06 +02:00
configs.c	kernel/configs.c: remove useless comments	2008-10-20 08:52:34 -07:00
cpu.c	cpuinit fixes in kernel/*	2008-11-30 10:03:37 -08:00
cpuset.c	sched, cpusets: fix warning in kernel/cpuset.c	2008-11-29 20:39:29 +01:00
delayacct.c	per-task-delay-accounting: update taskstats for memory reclaim delay	2008-07-25 10:53:47 -07:00
dma-coherent.c	dma-coherent: export dma_[alloc|release]_from_coherent methods	2008-08-22 08:34:53 +02:00
dma.c	kernel/dma.c: remove a CVS keyword	2008-10-16 11:21:30 -07:00
exec_domain.c	proc: move /proc/execdomains to kernel/exec_domain.c	2008-10-23 14:30:41 +04:00
exit.c	tracing/function-return-tracer: free the return stack on free_task()	2008-11-23 22:34:02 +01:00
extable.c
fork.c	ftrace: fix race in function graph during fork	2008-12-03 17:15:03 +01:00
freezer.c	freezer_cg: use thaw_process() in unfreeze_cgroup()	2008-10-30 11:38:45 -07:00
futex.c	hrtimer: make the futex() system call use the per process slack value	2008-09-11 07:17:00 -07:00
futex_compat.c
hrtimer.c	hrtimer: clean up unused callback modes	2008-11-12 09:54:40 +01:00
itimer.c	timers: fix itimer/many thread hang	2008-09-14 16:25:35 +02:00
kallsyms.c	sprint_symbol(): use less stack	2008-11-19 18:49:58 -08:00
Kconfig.freezer	container freezer: implement freezer cgroup subsystem	2008-10-20 08:52:34 -07:00
Kconfig.hz	sched: fix SCHED_HRTICK dependency	2008-07-28 14:37:38 +02:00
Kconfig.preempt
kexec.c	kexec: fix crash_save_vmcoreinfo_init build problem	2008-10-20 15:28:50 -07:00
kfifo.c
kgdb.c	kgdb: call touch_softlockup_watchdog on resume	2008-10-06 13:50:59 -05:00
kmod.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus	2008-10-16 12:38:34 -07:00
kprobes.c	kernel/kprobes.c: don't pad kretprobe_table_locks[] on uniprocessor builds	2008-11-12 17:17:17 -08:00
ksysfs.c	profiling: dynamically enable readprofile at runtime	2008-10-16 11:21:31 -07:00
kthread.c	tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()	2008-11-16 09:01:36 +01:00
latencytop.c
lockdep.c	ftrace: replace raw_local_irq_save with local_irq_save	2008-12-03 08:56:19 +01:00
lockdep_internals.h	lockdep: build fix	2008-08-13 12:55:10 +02:00
lockdep_proc.c	lockstat: fix numerical output rounding error	2008-08-26 10:37:46 +02:00
Makefile	tracing/function-return-tracer: change the name into function-graph-tracer	2008-11-26 01:59:45 +01:00
marker.c	markers/tracpoints: fix non-modular build	2008-11-16 09:52:03 +01:00
module.c	Merge branches 'tracing/branch-tracer', 'tracing/ftrace', 'tracing/function-return-tracer', 'tracing/tracepoints' and 'tracing/urgent' into tracing/core	2008-11-17 09:36:22 +01:00
mutex-debug.c
mutex-debug.h
mutex.c	locking: fix mutex @key parameter kernel-doc notation	2008-07-28 18:12:36 +02:00
mutex.h
notifier.c	ftrace: ignore functions that cannot be kprobe-ed	2008-10-14 10:34:22 +02:00
ns_cgroup.c	cgroup_clone: use pid of newly created task for new cgroup	2008-07-25 10:53:37 -07:00
nsproxy.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
panic.c	taint: add missing comment	2008-12-01 19:55:24 -08:00
params.c	Fix compile warning in kernel/params.c	2008-10-23 12:09:00 -07:00
pid.c	pidns: remove now unused find_pid function.	2008-07-25 10:53:45 -07:00
pid_namespace.c	pid_ns: (BUG 11391) change ->child_reaper when init->group_leader exits	2008-09-02 19:21:38 -07:00
pm_qos_params.c	pm_qos_requirement might sleep	2008-09-02 19:21:40 -07:00
posix-cpu-timers.c	sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers	2008-11-17 16:49:35 +01:00
posix-timers.c	Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2	2008-10-22 09:48:06 +02:00
printk.c	printk: remove unused code from kernel/printk.c	2008-10-23 21:54:29 +02:00
profile.c	Merge commit 'v2.6.28-rc7' into tracing/core	2008-12-04 09:07:19 +01:00
ptrace.c	remove __ARCH_WANT_COMPAT_SYS_PTRACE	2008-11-30 11:00:15 -08:00
rcuclassic.c	rcu: RCU-based detection of stalled CPUs for Classic RCU, fix	2008-10-03 10:41:00 +02:00
rcupdate.c	rcupdate: fix bug of rcu_barrier*()	2008-10-21 15:59:53 +02:00
rcupreempt.c	byteorder: remove direct includes of linux/byteorder/swab[b].h	2008-10-20 08:52:40 -07:00
rcupreempt_trace.c	rcu: trace fix possible mem-leak	2008-08-15 17:54:40 +02:00
rcutorture.c	byteorder: remove direct includes of linux/byteorder/swab[b].h	2008-10-20 12:51:53 -07:00
relay.c	relay: fix cpu offline problem	2008-11-18 15:08:56 +01:00
res_counter.c	cgroup files: convert res_counter_write() to be a cgroups write_string() handler	2008-07-25 10:53:36 -07:00
resource.c	reserve_region_with_split: Fix GFP_KERNEL usage under spinlock	2008-11-01 09:53:58 -07:00
rtmutex-debug.c
rtmutex-debug.h
rtmutex-tester.c	sysdev: Pass the attribute to the low level sysdev show/store function	2008-07-21 21:55:02 -07:00
rtmutex.c	hrtimer: convert kernel/* to the new hrtimer apis	2008-09-05 21:35:13 -07:00
rtmutex.h
rtmutex_common.h
rwsem.c
sched.c	Merge commit 'v2.6.28-rc7' into tracing/core	2008-12-04 09:07:19 +01:00
sched_clock.c	sched_clock: prevent scd->clock from moving backwards	2008-10-10 11:17:04 +02:00
sched_cpupri.c	sched: use a 2-d bitmap for searching lowest-pri CPU	2008-06-06 15:19:28 +02:00
sched_cpupri.h	sched: fix the cpuprio count really	2008-06-06 15:19:44 +02:00
sched_debug.c	sched: fix kernel warning on /proc/sched_debug access	2008-11-16 08:07:15 +01:00
sched_fair.c	sched: release buddies on yield	2008-11-11 11:57:22 +01:00
sched_features.h	sched: backward looking buddy	2008-11-05 10:30:14 +01:00
sched_idletask.c	sched: add CONFIG_SMP consistency	2008-10-22 10:01:52 +02:00
sched_rt.c	Merge commit 'v2.6.28-rc1' into sched/urgent	2008-10-24 12:48:46 +02:00
sched_stats.h	sched, signals: fix the racy usage of ->signal in account_group_xxx/run_posix_cpu_timers	2008-11-17 16:49:35 +01:00
seccomp.c
semaphore.c	semaphore: __down_common: use signal_pending_state()	2008-08-05 14:33:47 -07:00
signal.c	tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()	2008-11-16 09:01:36 +01:00
smp.c	generic-ipi: fix the smp_mb() placement	2008-11-06 08:41:56 +01:00
softirq.c	irq: call __irq_enter() before calling the tick_idle_check	2008-11-10 22:36:39 +01:00
softlockup.c	Make the taint flags reliable	2008-10-16 11:21:31 -07:00
spinlock.c	lockdep: spin_lock_nest_lock(), checkpatch fixes	2008-08-13 13:56:51 +02:00
srcu.c
stacktrace.c	stacktrace: fix modular build, export print_stack_trace and save_stack_trace	2008-06-30 09:20:55 +02:00
stop_machine.c	stop_machine: fix race with return value (fixes Bug #11989)	2008-11-16 15:09:52 -08:00
sys.c	Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2	2008-10-22 09:48:06 +02:00
sys_ni.c	reintroduce accept4	2008-11-19 18:49:57 -08:00
sysctl.c	Merge commit 'v2.6.28-rc7' into tracing/core	2008-12-04 09:07:19 +01:00
sysctl_check.c	sysctl: check for bogus modes	2008-07-25 10:53:45 -07:00
taskstats.c	taskstats: remove initialization of static per-cpu variable	2008-07-25 10:53:47 -07:00
test_kprobes.c
time.c	select: add a timespec_add_safe() function	2008-09-05 21:34:57 -07:00
timeconst.pl
timer.c	Add round_jiffies_up and related routines	2008-11-06 08:42:48 +01:00
tracepoint.c	markers/tracpoints: fix non-modular build	2008-11-16 09:52:03 +01:00
tsacct.c	task IO accounting: move all IO statistics in struct task_io_accounting	2008-07-27 16:12:28 -07:00
uid16.c
user.c	sched: rt-bandwidth for user grouping interface	2008-08-19 13:10:09 +02:00
user_namespace.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
utsname.c	removed unused #include <linux/version.h>'s	2008-08-23 12:14:12 -07:00
utsname_sysctl.c	sysctl: simplify ->strategy	2008-10-16 11:21:47 -07:00
wait.c	wait: kill is_sync_wait()	2008-10-16 11:21:31 -07:00
workqueue.c	cpumask: introduce new API, without changing anything	2008-11-06 09:05:33 +01:00