linux.git/tools/testing/selftests/ftrace, branch v4.19

selftests: ftrace: Add synthetic event syntax testcase

2018-10-19T21:25:12+00:00

Add a testcase to check the syntax and field types for
synthetic_events interface.

Link: http://lkml.kernel.org/r/153986838264.18251.16627517536956299922.stgit@devbox

Acked-by: Shuah Khan 
Signed-off-by: Masami Hiramatsu 
Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Fix kprobe string testcase to not probe notrace function

2018-07-30T22:41:52+00:00

Fix kprobe string argument testcase to not probe notrace
function. Instead, it probes tracefs function which must
be available with ftrace.

Link: http://lkml.kernel.org/r/153294607107.32740.1664854684396589624.stgit@devbox

Signed-off-by: Masami Hiramatsu 
Signed-off-by: Steven Rostedt (VMware)

kselftests: Add tests for the preemptoff and irqsoff tracers

2018-07-26T14:50:17+00:00

Here we add unit tests for the preemptoff and irqsoff tracer by using a
kernel module introduced previously to trigger long preempt or irq
disabled sections in the kernel.

Link: http://lkml.kernel.org/r/20180711063540.91101-3-joel@joelfernandes.org

Reviewed-by: Masami Hiramatsu 
Acked-by: Masami Hiramatsu 
Signed-off-by: Joel Fernandes (Google) 
Signed-off-by: Steven Rostedt (VMware)

selftests/ftrace: Add snapshot and tracing_on test case

2018-07-25T14:29:42+00:00

Add a testcase for checking snapshot and tracing_on
relationship. This ensures that the snapshotting doesn't
affect current tracing on/off settings.

Link: http://lkml.kernel.org/r/153149932412.11274.15289227592627901488.stgit@devbox

Cc: Tom Zanussi 
Cc: Hiraku Toyooka 
Signed-off-by: Masami Hiramatsu 
Cc: Ingo Molnar 
Cc: Shuah Khan 
Cc: linux-kselftest@vger.kernel.org
Signed-off-by: Steven Rostedt (VMware)

Merge tag 'linux-kselftest-4.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2018-06-15T08:26:29+00:00

Pull more Kselftest updates from Shuah Khan:

 - fix a signedness bug in cgroups test

 - add ppc support for kprobe args tests

* tag 'linux-kselftest-4.18-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kselftest/cgroup: fix a signedness bug
  selftests/ftrace: Add ppc support for kprobe args tests

selftests/ftrace: Add ppc support for kprobe args tests

2018-06-07T19:42:14+00:00

Add powerpc support for the recently added kprobe args tests.

Signed-off-by: Naveen N. Rao 
Reviewed-by: Masami Hiramatsu 
Acked-by: Steven Rostedt (VMware) 
Signed-off-by: Shuah Khan (Samsung OSG)

tracing/selftest: Add test to test simple snapshot trigger for trace_marker

2018-06-04T21:28:01+00:00

Several complex trigger tests were added for trace_marker, but not a simple
one. This could be used to help diagnose a problem with the code by giving a
reference between how complex a trigger is that fails.

Suggested-by: Masami Hiramatsu 
Acked-by: Masami Hiramatsu 
Signed-off-by: Steven Rostedt (VMware)

tracing/selftest: Add test to test hist trigger between kernel event and trace_marker

2018-05-29T12:30:01+00:00

Add a test that tests a trigger that is initiated by a kernel event
(sched_waking) and compared to a write to the trace_marker.

Acked-by: Masami Hiramatsu 
Reviewed-by: Namhyung Kim 
Signed-off-by: Steven Rostedt (VMware)

tracing/selftest: Add selftests to test trace_marker histogram triggers

2018-05-29T12:29:54+00:00

Add a couple of tests that test the trace_marker histogram triggers.
One does a straight histogram test, the other will create a synthetic event
and test the latency between two different writes (using filters to
differentiate between them).

Acked-by: Masami Hiramatsu 
Reviewed-by: Namhyung Kim 
Signed-off-by: Steven Rostedt (VMware)

ftrace/selftest: Fix reset_trigger() to handle triggers with filters

2018-05-29T12:29:46+00:00

The reset_trigger() function breaks up the command by a space ' '. This is
useful to ignore the '[active]' word for triggers when removing them. But if
the trigger has a filter (ie. "if prio < 10") then the filter needs to be
attached to the line that is written into the trigger file to remove it. But
the truncation removes the filter and the triggers are not cleared properly.

Before, reset_trigger() did this:

 # echo 'hist:keys=common_pid if prev_prio < 10' > events/sched/sched_switch/trigger
 # echo 'hist:keys=common_pid if next_prio < 10' >> events/sched/sched_switch/trigger
 # cat events/sched/sched_switch/trigger
hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if prev_prio < 10 [active]
hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if next_prio < 10 [active]

 reset_trigger() {
   echo '!hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048' >> events/sched/sched_switch/trigger
 }

 # cat events/sched/sched_switch/trigger
hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if prev_prio < 10 [active]
hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if next_prio < 10 [active]

After, where it includes the filter:

 reset_trigger() {
   echo '!hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if prev_prio < 10' >> events/sched/sched_switch/trigger
 }

 # cat events/sched/sched_switch/trigger
hist:keys=common_pid:vals=hitcount:sort=hitcount:size=2048 if next_prio < 10 [active]

Fixes: cfa0963dc474f ("kselftests/ftrace : Add event trigger testcases")
Acked-by: Masami Hiramatsu 
Reviewed-by: Namhyung Kim 
Signed-off-by: Steven Rostedt (VMware)