Hi Arnaldo, On Wed, 31 Jul 2013 11:07:46 -0300, Arnaldo Carvalho de Melo wrote: > Em Wed, Jul 31, 2013 at 09:51:54AM +0900, Namhyung Kim escreveu: >> 2013-07-30 오후 10:28, Arnaldo Carvalho de Melo 쓴 글: >> >Em Tue, Jul 30, 2013 at 06:18:58PM +0900, Namhyung Kim escreveu: >> >>Current trace info data lacks the saved cmdline mapping which is >> >>needed for pevent to find out the comm of a task. Add this and bump >> >>up the version number so that perf can determine its presence when >> >>reading. > >> >Can't we get this from the PERF_RECORD_COMM synthesized at the beginning >> >of the session + the kernel generated ones for new threads? > >> >We would just call machine__find_thread() and use thread->comm, etc, no? > >> Yes, I think it's doable. However it needs an additional perf event >> only to generate the COMM events. So I decided not to do it and > > I don't think this is a problem, its in line with Ingo's suggestion of a > new perf ioctl to ask the kernel to generate PERF_RECORD_MMAP events for > existing threads.
Hmm.. could you please give me a link of the thread? And what kind of event should be used then? Thanks, Namhyung -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
