tools/rtla/rtla-osnoise-hist.rst

2 rtla-osnoise-hist
4 ------------------------------------------------------
5 Display a histogram of the osnoise tracer samples
6 ------------------------------------------------------
8 :Manual section: 1
19 occurrence in a histogram, displaying the results in a user-friendly way.
33 In the example below, *osnoise* tracer threads are set to run with real-time
34 priority *FIFO:1*, on CPUs *0-11*, for *900ms* at each period (*1s* by
37 histogram is set to group outputs in buckets of *10us* and *25* entries::
39   [root@f34 ~/]# rtla osnoise hist -P F:1 -c 0-11 -r 900000 -d 1M -b 10 -E 25
40   # RTLA osnoise histogram
43 …Index   CPU-000   CPU-001   CPU-002   CPU-003   CPU-004   CPU-005   CPU-006   CPU-007   CPU-008   …
47 …30            1         1         0         0        10         3         6        19        15   …
49 …        0         0         0         0         0         0         0         1         1         2
58 **rtla-osnoise**\(1), **rtla-osnoise-top**\(1)
60 *osnoise* tracer documentation: <https://www.kernel.org/doc/html/latest/trace/osnoise-tracer.html>