1. 06 Apr, 2009 11 commits
  2. 08 Mar, 2009 2 commits
  3. 05 Mar, 2009 2 commits
  4. 02 Mar, 2009 2 commits
  5. 28 Feb, 2009 2 commits
  6. 11 Feb, 2009 1 commit
    • Paul Mackerras's avatar
      perf_counters: allow users to count user, kernel and/or hypervisor events · 0475f9ea
      Paul Mackerras authored
      
      
      Impact: new perf_counter feature
      
      This extends the perf_counter_hw_event struct with bits that specify
      that events in user, kernel and/or hypervisor mode should not be
      counted (i.e. should be excluded), and adds code to program the PMU
      mode selection bits accordingly on x86 and powerpc.
      
      For software counters, we don't currently have the infrastructure to
      distinguish which mode an event occurs in, so we currently fail the
      counter initialization if the setting of the hw_event.exclude_* bits
      would require us to distinguish.  Context switches and CPU migrations
      are currently considered to occur in kernel mode.
      
      On x86, this changes the previous policy that only root can count
      kernel events.  Now non-root users can count kernel events or exclude
      them.  Non-root users still can't use NMI events, though.  On x86 we
      don't appear to have any way to control whether hypervisor events are
      counted or not, so hw_event.exclude_hv is ignored.
      
      On powerpc, the selection of whether to count events in user, kernel
      and/or hypervisor mode is PMU-wide, not per-counter, so this adds a
      check that the hw_event.exclude_* settings are the same as other events
      on the PMU.  Counters being added to a group have to have the same
      settings as the other hardware counters in the group.  Counters and
      groups can only be enabled in hw_perf_group_sched_in or power_perf_enable
      if they have the same settings as any other counters already on the
      PMU.  If we are not running on a hypervisor, the exclude_hv setting
      is ignored (by forcing it to 0) since we can't ever get any
      hypervisor events.
      Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
      0475f9ea
  7. 09 Feb, 2009 1 commit
  8. 04 Feb, 2009 1 commit
  9. 23 Jan, 2009 3 commits
  10. 27 Dec, 2008 1 commit
  11. 23 Dec, 2008 10 commits
  12. 19 Dec, 2008 1 commit
  13. 14 Dec, 2008 3 commits