Messages in this thread | | | From | "Masami Hiramatsu (Google)" <> | Subject | [PATCH v4 0/5] tracing/hist: Add percentage histogram suffixes | Date | Sat, 27 Aug 2022 13:03:05 +0900 |
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Hi,
Here is the 4th version of .percent and .graph suffixes for histogram trigger to show the value in percentage and in bar-graph respectively.
I've rebased on Tom's hitcount patch[1/5] on the series and added a patch for supressing display of hitcount[5/5] in this version.
This will help us to check the trend of the histogram instantly without any post processing tool.
Here shows an example of the percentage and the bar graph of the hitcount of the running tasks.
# cd /sys/kernel/debug/tracing/ # echo hist:keys=pid:vals=hitcount.percent,hitcount.graph:sort=pid > \ events/sched/sched_stat_runtime/trigger # sleep 10 # cat events/sched/sched_stat_runtime/hist # event histogram # # trigger info: hist:keys=pid:vals=hitcount.percent,hitcount.graph:sort=pid:size=2048 [active] #
{ pid: 14 } hitcount (%): 4.68 hitcount: ### { pid: 16 } hitcount (%): 17.18 hitcount: ########### { pid: 57 } hitcount (%): 7.81 hitcount: ##### { pid: 61 } hitcount (%): 31.25 hitcount: #################### { pid: 70 } hitcount (%): 4.68 hitcount: ### { pid: 77 } hitcount (%): 1.56 hitcount: # { pid: 145 } hitcount (%): 18.75 hitcount: ############ { pid: 151 } hitcount (%): 9.37 hitcount: ###### { pid: 152 } hitcount (%): 4.68 hitcount: ###
Totals: Hits: 64 Entries: 9 Dropped: 0
Of course if you explicitly specify the hitcount, it can show the hitcount as below;
# cd /sys/kernel/debug/tracing/ # echo hist:keys=pid:vals=hitcount,runtime:sort=pid > \ events/sched/sched_stat_runtime/trigger # sleep 10 # cat events/sched/sched_stat_runtime/hist # event histogram # # trigger info: hist:keys=pid:vals=hitcount,runtime:sort=pid:size=2048 [active] #
{ pid: 14 } hitcount: 2 runtime: 304876 { pid: 16 } hitcount: 8 runtime: 300574 { pid: 26 } hitcount: 2 runtime: 15578 { pid: 32 } hitcount: 2 runtime: 219186 { pid: 57 } hitcount: 3 runtime: 506003 { pid: 61 } hitcount: 20 runtime: 1681473 { pid: 69 } hitcount: 3 runtime: 201785 { pid: 70 } hitcount: 4 runtime: 360608 { pid: 77 } hitcount: 8 runtime: 4146935 { pid: 145 } hitcount: 13 runtime: 7537994 { pid: 155 } hitcount: 4 runtime: 2511937 { pid: 156 } hitcount: 2 runtime: 1398886
Totals: Hits: 71 Entries: 12 Dropped: 0
Thank you,
---
Masami Hiramatsu (Google) (4): tracing: Fix to check event_mutex is held while accessing trigger list tracing: Add .percent suffix option to histogram values tracing: Add .graph suffix option to histogram value tracing: Show hitcount value only when specified
Tom Zanussi (1): tracing: Allow multiple hitcount values in histograms
kernel/trace/trace.c | 3 - kernel/trace/trace_events_hist.c | 176 ++++++++++++++++++++++++++++++----- kernel/trace/trace_events_trigger.c | 3 - 3 files changed, 156 insertions(+), 26 deletions(-)
-- Masami Hiramatsu (Google) <mhiramat@kernel.org>
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