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Re: [tracecompass-dev] [diamon-discuss] My experience on perf, CTF and TraceCompass, and some suggection.
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On 01/23/2015 04:35 AM, Wang Nan wrote:
[...] I prefer to use:
# perf record -a -e sched:* -e syscalls:* sleep 1
However there are some bugs and I have to make some patches. They are
posted and being disscussed currently, those bugs are still exist
upstream.
Hmm, I can confirm this problem, when trying to convert a trace taken
with these events enabled, I get the following error:
Failed to add field 'nr
Failed to add event 'syscalls:sys_enter_io_submit'.
Good to know it's being looked at!
But when you say:
TraceCompass doesn't recognize syscall:* tracepoints as CPU status
changing point. I have to also catch raw_syscall:*, and which doubles
the number of samples.
I assume this was that with your patches applied, so that you could take
a trace of the syscall:* tracepoints?
Do you have a link to those patches somewhere? Or just let us know when
it gets integrated upstream. I was trying to update the analysis in
Trace Compass to handle syscall:* too, but we can't really do it without
knowing how it will look like in CTF format ;)
Cheers,
Alexandre