stephane eranian wrote: > On Tue, Jun 23, 2009 at 10:26 AM, Paul Mackerras<[email protected]> wrote: >> stephane eranian writes: >> >>> What happens if I do: >>> fd0 = perf_counter_open(&hwc1, getpid(), -1, -1, 0); >>> fd1 = perf_counter_open(&hwc2, getpid(), -1, fd0, 0); >>> >>> And then: >>> fd2 = perf_counter_open(&hwc2, getpid(), -1, fd1, 0); >> That perf_counter_open call will fail with an EINVAL error because fd1 >> is not a group leader. >> > Okay. Thanks. > > But that leads me to another question related to grouping > which was hinted for by Peter's comment about IBS. > > Can you have multiple sampling events in a group?
There's a PAPI ctest which exercises this - profile_two_events - and it does work with the PCL substrate. - Corey ------------------------------------------------------------------------------ Are you an open source citizen? Join us for the Open Source Bridge conference! Portland, OR, June 17-19. Two days of sessions, one day of unconference: $250. Need another reason to go? 24-hour hacker lounge. Register today! http://ad.doubleclick.net/clk;215844324;13503038;v?http://opensourcebridge.org _______________________________________________ perfmon2-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/perfmon2-devel
