Skip to content

R
raspberrypi-kernel

openeuler / raspberrypi-kernel

通知 13
Star 1
Fork 0
R
raspberrypi-kernel
切换分支/标签
  1. 11 12月, 2008 5 次提交
    • 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: clean up 'raw' type API · eab656ae
      由 Thomas Gleixner 提交于 
      Impact: cleanup

Introduce a separate hw_event type.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      eab656ae
    • 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
  3. 10 12月, 2008 3 次提交
  5. 09 12月, 2008 1 次提交
  7. 08 12月, 2008 6 次提交
  9. 06 12月, 2008 8 次提交
  11. 05 12月, 2008 17 次提交