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ccf47f5cc4
Add 'nohitcount' ('NOHC' for short) option for suppressing display of
the raw hitcount column in the histogram.
Note that you must specify at least one value except raw 'hitcount'
when you specify this nohitcount option.
# cd /sys/kernel/debug/tracing/
# echo hist:keys=pid:vals=runtime.percent,runtime.graph:sort=pid:NOHC > \
events/sched/sched_stat_runtime/trigger
# sleep 10
# cat events/sched/sched_stat_runtime/hist
# event histogram
#
# trigger info: hist:keys=pid:vals=runtime.percent,runtime.graph:sort=pid:size=2048:nohitcount [active]
#
{ pid: 8 } runtime (%): 3.02 runtime: #
{ pid: 14 } runtime (%): 2.25 runtime:
{ pid: 16 } runtime (%): 2.25 runtime:
{ pid: 26 } runtime (%): 0.17 runtime:
{ pid: 61 } runtime (%): 11.52 runtime: ####
{ pid: 67 } runtime (%): 1.56 runtime:
{ pid: 68 } runtime (%): 0.84 runtime:
{ pid: 76 } runtime (%): 0.92 runtime:
{ pid: 117 } runtime (%): 2.50 runtime: #
{ pid: 146 } runtime (%): 49.88 runtime: ####################
{ pid: 157 } runtime (%): 16.63 runtime: ######
{ pid: 158 } runtime (%): 8.38 runtime: ###
Link: https://lore.kernel.org/linux-trace-kernel/166610814787.56030.4980636083486339906.stgit@devnote2
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Tested-by: Tom Zanussi <zanussi@kernel.org>