• Daniel Bristot de Oliveira's avatar
    rtla/osnoise: Add the hist mode · 829a6c0b
    Daniel Bristot de Oliveira authored
    The rtla osnoise hist tool collects all osnoise:sample_threshold
    occurrence in a histogram, displaying the results in a user-friendly
    way. The tool also allows many configurations of the osnoise tracer
    and the collection of the tracer output.
    
    Here is one example of the rtla osnoise hist tool output:
      ---------- %< ----------
     [root@f34 ~]# rtla osnoise hist --bucket-size 10 --entries 100 -c 0-8 -d 1M -r 9000 -P F:1
     # RTLA osnoise histogram
     # Time unit is microseconds (us)
     # Duration:   0 00:01:00
     Index   CPU-000   CPU-001   CPU-002   CPU-003   CPU-004   CPU-005   CPU-006   CPU-007   CPU-008
     0           430       434       352       455       440       463       467       436       484
     10           88        88        92       141       120       100       126       166       100
     20           19         7        12        22         8         8        13        13        16
     30            6         0         2         0         1         2         2         1         0
     50            0         0         0         0         0         0         1         0         0
     over:         0         0         0         0         0         0         0         0         0
     count:      543       529       458       618       569       573       609       616       600
     min:          0         0         0         0         0         0         0         0         0
     avg:          0         0         0         0         0         0         0         0         0
     max:         30        20        30        20        30        30        50        30        20
      ---------- >% ----------
    
    Running
     - rtla osnoise hist --help
    
    provides information about the available options.
    
    Link: https://lkml.kernel.org/r/c68060544de89b8b62510ed91c7369f162eb465b.1639158831.git.bristot@kernel.org
    
    Cc: Tao Zhou <tao.zhou@linux.dev>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Tom Zanussi <zanussi@kernel.org>
    Cc: Masami Hiramatsu <mhiramat@kernel.org>
    Cc: Juri Lelli <juri.lelli@redhat.com>
    Cc: Clark Williams <williams@redhat.com>
    Cc: John Kacur <jkacur@redhat.com>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
    Cc: Daniel Bristot de Oliveira <bristot@kernel.org>
    Cc: linux-rt-users@vger.kernel.org
    Cc: linux-trace-devel@vger.kernel.org
    Cc: linux-kernel@vger.kernel.org
    Signed-off-by: default avatarDaniel Bristot de Oliveira <bristot@kernel.org>
    Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
    829a6c0b
osnoise_hist.c 18.7 KB