Messages in this thread | | | Date | Wed, 21 Aug 2013 17:23:05 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH] ftrace: add tgid information in task switch event. |
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On Wed, Aug 21, 2013 at 11:09:44AM -0400, Steven Rostedt wrote: > > From: Jiejing Zhang <jiejzhang@nvidia.com> > > > > ftrace only report pid in task switch event, which is > > actually thread ID in user space view, the comm of > > the thread will be like "Thread-1", "Compiler", etc > > in android system, it's useful if we can add tgid > > information in ftrace event to find out the process > > id, and the process id's comm will help us to figure > > out the application, which was useful on data analysis > > tools.
Meh.. are you telling me you really can't do that otherwise?
Adding this information makes the tracepoint slower for everybody else. How about you enable trace_sched_process_fork() and track things that way?
Also, last time I tried to change one of these stupid tracepoints userspace broke.. Rostedt says people should be using libtraceevent but I'm sceptical.
> > Change-Id: Ia99f58a56d691d770b3beb2f76de0351e6194a4a
That needs to die.
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