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  1. 11 Sep, 2009 5 commits
    • jolsa@redhat.com's avatar
      tracing: create generic trace parser · b63f39ea
      jolsa@redhat.com authored 
      Create a "trace_parser" that can parse the user space input for
separate words.

struct trace_parser is the descriptor.

Generic "trace_get_user" function that can be a helper to read multiple
words passed in by user space.
Signed-off-by: default avatarJiri Olsa <jolsa@redhat.com>
LKML-Reference: <1252682969-3366-2-git-send-email-jolsa@redhat.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      b63f39ea
    • Steven Rostedt's avatar
      tracing: consolidate code between trace_output.c and trace_function_graph.c · f81c972d
      Steven Rostedt authored 
      Both trace_output.c and trace_function_graph.c do basically the same
thing to handle the printing of the latency-format. This patch moves
the code into one function that both can use.
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      f81c972d
    • Steven Rostedt's avatar
      tracing: add lock depth to entries · 637e7e86
      Steven Rostedt authored 
      This patch adds the lock depth of the big kernel lock to the generic
entry header. This way we can see the depth of the lock and help
in removing the BKL.

Example:

 #                  _------=> CPU#
 #                 / _-----=> irqs-off
 #                | / _----=> need-resched
 #                || / _---=> hardirq/softirq
 #                ||| / _--=> preempt-depth
 #                |||| /_--=> lock-depth
 #                |||||/     delay
 #  cmd     pid   |||||| time  |   caller
 #     \   /      ||||||   \   |   /
   <idle>-0       2.N..3 5902255250us+: lock_acquire: read rcu_read_lock
   <idle>-0       2.N..3 5902255253us+: lock_release: rcu_read_lock
   <idle>-0       2dN..3 5902255257us+: lock_acquire: xtime_lock
   <idle>-0       2dN..4 5902255259us : lock_acquire: clocksource_lock
   <idle>-0       2dN..4 5902255261us+: lock_release: clocksource_lock
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      637e7e86
    • Steven Rostedt's avatar
      tracing: move tgid out of generic entry and into userstack · 48659d31
      Steven Rostedt authored 
      The userstack trace required the recording of the tgid entry.
Unfortunately, it was added to the generic entry where it wasted
4 bytes of every entry and was only used by one entry.

This patch moves it out of the generic field and moves it into the
only user (userstack_entry).
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      48659d31
    • Steven Rostedt's avatar
      tracing: add latency format to function_graph tracer · 49ff5903
      Steven Rostedt authored 
      While debugging something with the function_graph tracer, I found the
need to see the preempt count of the traces. Unfortunately, since
the function graph tracer has its own output formatting, it does not
honor the latency-format option.

This patch makes the function_graph tracer honor the latency-format
option, but still keeps control of the output. But now we have the
same details that the latency-format supplies.

 # tracer: function_graph
 #
 #      _-----=> irqs-off
 #     / _----=> need-resched
 #    | / _---=> hardirq/softirq
 #    || / _--=> preempt-depth
 #    ||| /
 #    ||||
 # CPU||||  DURATION                  FUNCTION CALLS
 # |  ||||   |   |                     |   |   |   |
  3)  d..1  1.333 us    |        idle_cpu();
  3)  d.h1              |        tick_check_idle() {
  3)  d.h1  0.550 us    |          tick_check_oneshot_broadcast();
  3)  d.h1              |          tick_nohz_stop_idle() {
  3)  d.h1              |            ktime_get() {
  3)  d.h1              |              ktime_get_ts() {
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      49ff5903
  3. 10 Sep, 2009 7 commits
  5. 06 Sep, 2009 2 commits
  7. 05 Sep, 2009 26 commits