Jiri Olsa
ced39002f5
ftrace, perf: Add support to use function tracepoint in perf ...
Adding perf registration support for the ftrace function event,
so it is now possible to register it via perf interface.
The perf_event struct statically contains ftrace_ops as a handle
for function tracer. The function tracer is registered/unregistered
in open/close actions.
To be efficient, we enable/disable ftrace_ops each time the traced
process is scheduled in/out (via TRACE_REG_PERF_(ADD|DELL) handlers).
This way tracing is enabled only when the process is running.
Intentionally using this way instead of the event's hw state
PERF_HES_STOPPED, which would not disable the ftrace_ops.
It is now possible to use function trace within perf commands
like:
perf record -e ftrace:function ls
perf stat -e ftrace:function ls
Allowed only for root.
Link: http://lkml.kernel.org/r/1329317514-8131-6-git-send-email-jolsa@redhat.com
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2012-02-21 11:08:27 -05:00
switch debugfs to umode_t
2012-01-03 22:54:56 -05:00
ftrace: Add enable/disable ftrace_ops control interface
2012-02-21 11:08:23 -05:00
trace events: Update version number reference to new 3.x scheme for EVENT_POWER_TRACING_DEPRECATED
2011-07-25 09:37:21 +02:00
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 17:03:38 +02:00
Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2011-10-26 17:03:38 +02:00
tracing: Use NUMA allocation for per-cpu ring buffer pages
2011-06-14 22:04:39 -04:00
PM / Runtime: Introduce trace points for tracing rpm_* functions
2011-09-27 22:53:27 +02:00
ftrace: sched_switch plugin is deprecated
2012-02-13 09:14:47 -05:00
ftrace, perf: Add support to use function tracepoint in perf
2012-02-21 11:08:27 -05:00
tracing: Add a counter clock for those that do not trust clocks
2011-09-19 11:35:58 -04:00
ftrace, perf: Add support to use function tracepoint in perf
2012-02-21 11:08:27 -05:00
ftrace, perf: Add support to use function tracepoint in perf
2012-02-21 11:08:27 -05:00
ftrace, perf: Add add/del tracepoint perf registration actions
2012-02-21 11:08:25 -05:00
tracing/trivial: Use kcalloc instead of kzalloc to allocate array
2012-02-13 13:48:11 -05:00
tracing/filter: Add startup tests for events filter
2011-08-19 14:35:59 -04:00
ftrace, perf: Add support to use function tracepoint in perf
2012-02-21 11:08:27 -05:00
ftrace: Fix regression of :mod:module function enabling
2011-07-07 11:30:08 -04:00
tracing: Still trace filtered irq functions when irq trace is disabled
2011-07-07 22:26:27 -04:00
Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace into perf/core
2011-11-11 08:19:37 +01:00
ftrace, perf: Add add/del tracepoint perf registration actions
2012-02-21 11:08:25 -05:00
atomic: use <linux/atomic.h>
2011-07-26 16:49:47 -07:00
tracing: Don't use p->len field to determine output in __print_*() functions
2012-02-21 11:08:13 -05:00
tracing: Clean up tb_fmt to not give faulty compile warning
2011-08-10 20:36:32 -04:00
tracing: Remove obsolete sched_switch tracer
2011-02-08 17:14:56 -05:00
tracing/latency: Fix header output for latency tracers
2011-11-07 13:48:35 -05:00
ftrace: Add self-tests for multiple function trace users
2011-05-18 19:24:51 -04:00
ftrace: Add self-tests for multiple function trace users
2011-05-18 19:24:51 -04:00
tracing: Have stack tracing set filtered functions at boot
2011-12-21 07:26:49 -05:00
ftrace, perf: Add add/del tracepoint perf registration actions
2012-02-21 11:08:25 -05:00
ced39002f5