ok, looks enabling all events is enough. many thanks.
BR
Song
在 2021/5/26 下午2:10, Christoph Mathys 写道:
Hi Song,
what's your command to get this log? it seems to have better information
than mine.
I just do old-school tracing:
# enable all available events
echo 1 > /sys/kernel/debug/tracing/events/enable
# start tracing
echo 1 > /sys/kernel/debug/tracing/tracing_on
Then I run cyclictest with -b and --tracemark to stop tracing when a
latency hits and write a mark to the file.
The trace can then be obtained by:
cat /sys/kernel/debug/tracing/trace
HTH
Christoph
