1. 06 Feb, 2009 3 commits
    • Arnaldo Carvalho de Melo's avatar
      trace: Call tracing_reset_online_cpus before tracer->init() · b6f11df2
      Arnaldo Carvalho de Melo authored
      
      
      Impact: cleanup
      
      To make it easy for ftrace plugin writers, as this was open coded in
      the existing plugins
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Acked-by: default avatarFrédéric Weisbecker <fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      b6f11df2
    • Arnaldo Carvalho de Melo's avatar
      tracing: Introduce trace_buffer_{lock_reserve,unlock_commit} · 51a763dd
      Arnaldo Carvalho de Melo authored
      
      
      Impact: new API
      
      These new functions do what previously was being open coded, reducing
      the number of details ftrace plugin writers have to worry about.
      
      It also standardizes the handling of stacktrace, userstacktrace and
      other trace options we may introduce in the future.
      
      With this patch, for instance, the blk tracer (and some others already
      in the tree) can use the "userstacktrace" /d/tracing/trace_options
      facility.
      
      $ codiff /tmp/vmlinux.before /tmp/vmlinux.after
      linux-2.6-tip/kernel/trace/trace.c:
        trace_vprintk              |   -5
        trace_graph_return         |  -22
        trace_graph_entry          |  -26
        trace_function             |  -45
        __ftrace_trace_stack       |  -27
        ftrace_trace_userstack     |  -29
        tracing_sched_switch_trace |  -66
        tracing_stop               |   +1
        trace_seq_to_user          |   -1
        ftrace_trace_special       |  -63
        ftrace_special             |   +1
        tracing_sched_wakeup_trace |  -70
        tracing_reset_online_cpus  |   -1
       13 functions changed, 2 bytes added, 355 bytes removed, diff: -353
      
      linux-2.6-tip/block/blktrace.c:
        __blk_add_trace |  -58
       1 function changed, 58 bytes removed, diff: -58
      
      linux-2.6-tip/kernel/trace/trace.c:
        trace_buffer_lock_reserve  |  +88
        trace_buffer_unlock_commit |  +86
       2 functions changed, 174 bytes added, diff: +174
      
      /tmp/vmlinux.after:
       16 functions changed, 176 bytes added, 413 bytes removed, diff: -237
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Acked-by: default avatarFrédéric Weisbecker <fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      51a763dd
    • Arnaldo Carvalho de Melo's avatar
      ring_buffer: remove unused flags parameter · 0a987751
      Arnaldo Carvalho de Melo authored
      
      
      Impact: API change, cleanup
      
      >From ring_buffer_{lock_reserve,unlock_commit}.
      
      $ codiff /tmp/vmlinux.before /tmp/vmlinux.after
      linux-2.6-tip/kernel/trace/trace.c:
        trace_vprintk              |  -14
        trace_graph_return         |  -14
        trace_graph_entry          |  -10
        trace_function             |   -8
        __ftrace_trace_stack       |   -8
        ftrace_trace_userstack     |   -8
        tracing_sched_switch_trace |   -8
        ftrace_trace_special       |  -12
        tracing_sched_wakeup_trace |   -8
       9 functions changed, 90 bytes removed, diff: -90
      
      linux-2.6-tip/block/blktrace.c:
        __blk_add_trace |   -1
       1 function changed, 1 bytes removed, diff: -1
      
      /tmp/vmlinux.after:
       10 functions changed, 91 bytes removed, diff: -91
      Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      Acked-by: default avatarFrédéric Weisbecker <fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      0a987751
  2. 05 Feb, 2009 5 commits
  3. 04 Feb, 2009 32 commits