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  1. 15 12月, 2008 2 次提交
  3. 12 12月, 2008 1 次提交
  5. 11 12月, 2008 8 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
    • I
      perf counters: add support for group counters · 04289bb9
      由 Ingo Molnar 提交于 
      Impact: add group counters

This patch adds the "counter groups" abstraction.

Groups of counters behave much like normal 'single' counters, with a
few semantic and behavioral extensions on top of that.

A counter group is created by creating a new counter with the open()
syscall's group-leader group_fd file descriptor parameter pointing
to another, already existing counter.

Groups of counters are scheduled in and out in one atomic group, and
they are also roundrobin-scheduled atomically.

Counters that are member of a group can also record events with an
(atomic) extended timestamp that extends to all members of the group,
if the record type is set to PERF_RECORD_GROUP.
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      04289bb9
    • I
      perf counters: restructure the API · 9f66a381
      由 Ingo Molnar 提交于 
      Impact: clean up new API

Thorough cleanup of the new perf counters API, we now get clean separation
of the various concepts:

 - introduce perf_counter_hw_event to separate out the event source details

 - move special type flags into separate attributes: PERF_COUNT_NMI,
   PERF_COUNT_RAW

 - extend the type to u64 and reserve it fully to the architecture in the
   raw type case.

And make use of all these changes in the core and x86 perfcounters code.

Also change the syscall signature to:

  asmlinkage int sys_perf_counter_open(

	struct perf_counter_hw_event	*hw_event_uptr		__user,
	pid_t				pid,
	int				cpu,
	int				group_fd);

( Note that group_fd is unused for now - it's reserved for the counter
  groups abstraction. )
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      9f66a381
    • T
      perf counters: expand use of counter->event · dfa7c899
      由 Thomas Gleixner 提交于 
      Impact: change syscall, cleanup

Make use of the new perf_counters event type.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      dfa7c899
    • T
      perf counters: protect them against CSTATE transitions · 4ac13294
      由 Thomas Gleixner 提交于 
      Impact: fix rare lost events problem

There are CPUs whose performance counters misbehave on CSTATE transitions,
so provide a way to just disable/enable them around deep idle methods.

(hw_perf_enable_all() is cheap on x86.)
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      4ac13294
  7. 10 12月, 2008 3 次提交
  9. 08 12月, 2008 9 次提交
  11. 04 12月, 2008 2 次提交
  13. 03 12月, 2008 5 次提交
  15. 01 12月, 2008 6 次提交
  17. 30 11月, 2008 1 次提交
  19. 28 11月, 2008 3 次提交