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  1. 06 4月, 2009 7 次提交
  3. 08 3月, 2009 2 次提交
  5. 06 3月, 2009 2 次提交
  7. 02 3月, 2009 2 次提交
  9. 28 2月, 2009 2 次提交
  11. 11 2月, 2009 1 次提交
    • P
      perf_counters: allow users to count user, kernel and/or hypervisor events · 0475f9ea
      由 Paul Mackerras 提交于 
      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: NPaul Mackerras <paulus@samba.org>
      0475f9ea
  13. 09 2月, 2009 1 次提交
  15. 05 2月, 2009 1 次提交
  17. 23 1月, 2009 3 次提交
  19. 27 12月, 2008 1 次提交
  21. 23 12月, 2008 10 次提交
  23. 20 12月, 2008 1 次提交
  25. 15 12月, 2008 3 次提交
  27. 11 12月, 2008 4 次提交
    • I
      perf counters: clean up state transitions · 6a930700
      由 Ingo Molnar 提交于 
      Impact: cleanup

Introduce a proper enum for the 3 states of a counter:

	PERF_COUNTER_STATE_OFF		= -1
	PERF_COUNTER_STATE_INACTIVE	=  0
	PERF_COUNTER_STATE_ACTIVE	=  1

and rename counter->active to counter->state and propagate the
changes everywhere.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      6a930700
    • I
      perf counters: consolidate hw_perf save/restore APIs · 01b2838c
      由 Ingo Molnar 提交于 
      Impact: cleanup

Rename them to better match up the usual IRQ disable/enable APIs:

 hw_perf_disable_all()  => hw_perf_save_disable()
 hw_perf_restore_ctrl() => hw_perf_restore()
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      01b2838c
    • I
      perf counters: implement PERF_COUNT_CPU_CLOCK · 5c92d124
      由 Ingo Molnar 提交于 
      Impact: add new perf-counter type

The 'CPU clock' counter counts the amount of CPU clock time that is
elapsing, in nanoseconds. (regardless of how much of it the task is
spending on a CPU executing)

This counter type is a Linux kernel based abstraction, it is available
even if the hardware does not support native hardware performance counters.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5c92d124
    • I
      perf counters: hw driver API · 621a01ea
      由 Ingo Molnar 提交于 
      Impact: restructure code, introduce hw_ops driver abstraction

Introduce this abstraction to handle counter details:

 struct hw_perf_counter_ops {
	void (*hw_perf_counter_enable)	(struct perf_counter *counter);
	void (*hw_perf_counter_disable)	(struct perf_counter *counter);
	void (*hw_perf_counter_read)	(struct perf_counter *counter);
 };

This will be useful to support assymetric hw details, and it will also
be useful to implement "software counters". (Counters that count kernel
managed sw events such as pagefaults, context-switches, wall-clock time
or task-local time.)
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      621a01ea