On Tue, 2 Jul 2013, Michael Kerrisk wrote: > On 06/28/13 22:55, Vince Weaver wrote: > > > > The perf_event_open() ENABLE/DISABLE/RESET ioctls can take an argument, > > PERF_IOC_FLAG_GROUP. This wasn't documented at all until about a year > > ago (despite the support being there from the beginning) so I missed > > this when initially writing the manpage. > > > > Signed-off-by: Vince Weaver <vincent.weaver@xxxxxxxxx> > > Thanks, Vince. Applied. Just noticed the following typos in that patch; sorry for not catching these before sending out the original. Signed-off-by: Vince Weaver <vincent.weaver@xxxxxxxxx> diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2 index 862913b..dc04232 100644 --- a/man2/perf_event_open.2 +++ b/man2/perf_event_open.2 @@ -1588,7 +1588,7 @@ is the amount of data actually dumped (can be less than .I weight If .B PERF_SAMPLE_WEIGHT -is enabled, then a 64 bit value provided by the hardwre +is enabled, then a 64 bit value provided by the hardware is recorded that indicates how costly the event was. This allows expensive events to stand out more clearly in profiles. @@ -1837,7 +1837,7 @@ Using an argument of 0 is considered undefined behavior. .TP .B PERF_EVENT_IOC_RESET Reset the event count specified by the -file descriptor argumentto zero. +file descriptor argument to zero. This resets only the counts; there is no way to reset the multiplexing .I time_enabled @@ -1852,7 +1852,7 @@ reset, even if the event specified is not the group leader. If the .B PERF_IOC_FLAG_GROUP -bit is not set, then the behavior is somwhat unexpected: +bit is not set, then the behavior is somewhat unexpected: when sent to a group leader only the leader is reset (children are left alone); when sent to a child all events in a group are reset. -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
