• Daniel Bristot de Oliveira's avatar
    trace/osnoise: Add a header with PREEMPT_RT additional fields · d03721a6
    Daniel Bristot de Oliveira authored
    Some extra flags are printed to the trace header when using the
    PREEMPT_RT config. The extra flags are: need-resched-lazy,
    preempt-lazy-depth, and migrate-disable.
    
    Without printing these fields, the osnoise specific fields are
    shifted by three positions, for example:
    
     # tracer: osnoise
     #
     #                                _-----=> irqs-off
     #                               / _----=> need-resched
     #                              | / _---=> hardirq/softirq
     #                              || / _--=> preempt-depth                            MAX
     #                              || /                                             SINGLE      Interference counters:
     #                              ||||               RUNTIME      NOISE  %% OF CPU  NOISE    +-----------------------------+
     #           TASK-PID      CPU# ||||   TIMESTAMP    IN US       IN US  AVAILABLE  IN US     HW    NMI    IRQ   SIRQ THREAD
     #              | |         |   ||||      |           |             |    |            |      |      |      |      |      |
                <...>-741     [000] .......  1105.690909: 1000000        234  99.97660      36     21      0   1001     22      3
                <...>-742     [001] .......  1105.691923: 1000000        281  99.97190     197      7      0   1012     35     14
                <...>-743     [002] .......  1105.691958: 1000000       1324  99.86760     118     11      0   1016    155    143
                <...>-744     [003] .......  1105.691998: 1000000        109  99.98910      21      4      0   1004     33      7
                <...>-745     [004] .......  1105.692015: 1000000       2023  99.79770      97     37      0   1023     52     18
    
    Add a new header for osnoise with the missing fields, to be used
    when the PREEMPT_RT is enabled.
    
    Link: https://lkml.kernel.org/r/1f03289d2a51fde5a58c2e7def063dc630820ad1.1626598844.git.bristot@kernel.org
    
    Cc: Tom Zanussi <zanussi@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Masami Hiramatsu <mhiramat@kernel.org>
    Signed-off-by: default avatarDaniel Bristot de Oliveira <bristot@kernel.org>
    Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
    d03721a6
trace_osnoise.c 50.2 KB