2013-06-27 (목), 07:56 -0600, David Ahern: > On 6/26/13 11:23 PM, Namhyung Kim wrote: > > The pid filtering in ftrace is done via set_ftrace_pid file under the > > tracing debugfs directory. IIRC It only supports process filtering not > > thread filtering by iterating all threads in the kernel code. So --tid > > option cannot be implemented as other perf commands. > > > > So I chose not to and assigned -t option to --tracer. > > Could that ever change? With the current code why call it pid in the > option but assign it to target.tid? Seems a like a source for confusion
Hmm.. right. I did it in order not to do same iteration of the thread group in user space. But now I think that it's just an unnecessary optimization and can confuse readers. > later. Would be better to just assign to target.pid and let the > machinery do the right thing. Will do. Thanks, Namhyung -- 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/
