Zhang, Yanmin wrote: > From: Zhang, Yanmin <yanmin_zhang@xxxxxxxxxxxxxxx> > > Parameter --pid (or -p) of perf currently means a thread-wide collection. > For exmaple, if a process whose id is 8888 has 10 threads, 'perf top -p 8888' > just collects the main thread statistics. That's misleading. Users are > used to attach a whole process when debugging a process by gdb. To follow > normal usage style, the patch change --pid to process-wide collection and > add --tid (-t) to mean a thread-wide collection. > > Usage example is: > #perf top -p 8888 > #perf record -p 8888 -f sleep 10 > #perf stat -p 8888 -f sleep 10 > Above commands collect the statistics of all threads of process 8888. > > Signed-off-by: Zhang Yanmin <yanmin_zhang@xxxxxxxxxxxxxxx> > Seems this patch causes seg faults: # ./perf sched record Segmentation fault # ./perf kmem record Segmentation fault # ./perf timechart record Segmentation fault -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
