On Fri, Mar 14, 2014 at 10:43:44AM -0400, Don Zickus wrote: > When trying to capture perf data on a system running spejbb2013, > perf hung for about 15 minutes. This is because it took that > long to gather about 10,000 thread maps and process them. > > I don't think a user wants to wait that long. > > Instead, recognize that thread maps are roughly equivalent to > pid maps and just quickly copy those instead. > > To do this, I synthesize 'fork' events, this eventually calls > thread__fork() and copies the maps over. > > The overhead goes from 15 minutes down to about a few seconds. > > Signed-off-by: Don Zickus <[email protected]> > -- > V2: based on Jiri's comments, moved malloc up a level > and made sure the memory was freed
Acked-by: Jiri Olsa <[email protected]> thanks, jirka -- 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/
