On Wed, Oct 01, 2014 at 03:03:16PM -0300, Arnaldo Carvalho de Melo wrote: > Em Wed, Sep 24, 2014 at 01:51:08PM -0700, Andi Kleen escreveu: > > > It's currently difficult to filter out perf itself using a filter. > > This can give cascading effects during IO tracing when the IO perf > > does itself causes more trace output. > > > The best way to filter is to use the pid. But it's difficult to get the pid > > of perf without using hacks. > > > Add a PERF_PID meta variable to the perf filter that contains the current > > pid. > > > With this patch the following works > > > % perf record -e syscalls:sys_enter_write -a --filter 'common_pid != > > PERF_PID' ... > > So I tried this one now and saw the other patch, that applies the > --filter to all events, while trying I got:
Patch seems reasonable to me. However adding PERF_PID and sanitizing --filter are really two different things and should probably not be mixed in a patch. -Andi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
