linux-toradex.git/kernel/trace/trace_sched_switch.c, branch v2.6.27.16

ftrace: move sched_switch enable after markers

2008-07-11T13:49:18+00:00

We have two markers now that are enabled on sched_switch. One that records
the context switching and the other that records task wake ups. Currently
we enable the tracing first and then set the markers. This causes some
confusing traces:

# tracer: sched_switch
#
#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
#              | |      |          |         |
       trace-cmd-3973  [00]   115.834817:   3973:120:R   +     3:  0:S
       trace-cmd-3973  [01]   115.834910:   3973:120:R   +     6:  0:S
       trace-cmd-3973  [02]   115.834910:   3973:120:R   +     9:  0:S
       trace-cmd-3973  [03]   115.834910:   3973:120:R   +    12:  0:S
       trace-cmd-3973  [02]   115.834910:   3973:120:R   +     9:  0:S
          -0     [02]   115.834910:      0:140:R ==>  3973:120:R

Here we see that trace-cmd with PID 3973 wakes up task 9 but the next line
shows the idle task doing a context switch to task 3973.

Enabling the tracing to _after_ the markers are set creates a much saner
output:

# tracer: sched_switch
#
#           TASK-PID   CPU#    TIMESTAMP  FUNCTION
#              | |      |          |         |
          -0     [02]  7922.634225:      0:140:R ==>  4790:120:R
       trace-cmd-4789  [03]  7922.634225:      0:140:R   +  4790:120:R

Signed-off-by: Steven Rostedt 
Cc: Steven Rostedt 
Cc: Peter Zijlstra 
Cc: Andrew Morton 
Signed-off-by: Ingo Molnar

namespacecheck: fixes

2008-06-16T12:44:13+00:00

Signed-off-by: Ingo Molnar

ftrace: fix up cmdline recording

2008-05-26T20:51:49+00:00

The new work with converting the trace hooks over to markers broke the
command line recording of ftrace. This patch fixes it again.

Signed-off-by: Steven Rostedt 
Cc: Peter Zijlstra 
Cc: Mathieu Desnoyers 
Signed-off-by: Thomas Gleixner

ftrace: move ftrace_special to trace.c

2008-05-26T20:51:09+00:00

Move the ftrace_special out of sched_switch to trace.c.

Signed-off-by: Steven Rostedt 
Cc: pq@iki.fi
Cc: proski@gnu.org
Cc: sandmann@redhat.com
Cc: a.p.zijlstra@chello.nl
Signed-off-by: Thomas Gleixner

Port ftrace to markers

2008-05-23T20:29:25+00:00

Porting ftrace to the marker infrastructure.

Don't need to chain to the wakeup tracer from the sched tracer, because markers
support multiple probes connected.

Signed-off-by: Mathieu Desnoyers 
CC: Steven Rostedt 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

ftrace: fix comm on function trace output

2008-05-23T19:52:12+00:00

In cleaning up of the sched_switch code, the function trace recording
of task comms was removed. This patch adds back the recording of comms
for function trace. The output of ftrace now has the task comm instead
of <...>.

Signed-off-by: Steven Rostedt 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

ftrace: remove add-hoc code

2008-05-23T19:13:32+00:00

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

ftrace: sched special

2008-05-23T19:08:47+00:00

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

ftrace: fix cmdline tracing

2008-05-23T19:07:57+00:00

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

ftrace: trace scheduler rbtree

2008-05-23T19:07:31+00:00

Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner