1. 23 12月, 2008 3 次提交
  2. 17 12月, 2008 1 次提交
  3. 15 12月, 2008 8 次提交
  4. 11 12月, 2008 11 次提交
    • I
      perf counters: clean up state transitions · 6a930700
      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: add prctl interface to disable/enable counters · 1d1c7ddb
      Ingo Molnar 提交于
      Add a way for self-monitoring tasks to disable/enable counters summarily,
      via a prctl:
      
      	PR_TASK_PERF_COUNTERS_DISABLE		31
      	PR_TASK_PERF_COUNTERS_ENABLE		32
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      1d1c7ddb
    • I
      perf counters: implement PERF_COUNT_TASK_CLOCK · bae43c99
      Ingo Molnar 提交于
      Impact: add new perf-counter type
      
      The 'task clock' counter counts the amount of time a task is executing,
      in nanoseconds. It stops ticking when a task is scheduled out either due
      to it blocking, sleeping or it being preempted.
      
      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>
      bae43c99
    • I
      perf counters: consolidate hw_perf save/restore APIs · 01b2838c
      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
      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
      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: group counter, fixes · ccff286d
      Ingo Molnar 提交于
      Impact: bugfix
      
      Check that a group does not span outside the context of a CPU or a task.
      
      Also, do not allow deep recursive hierarchies.
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      ccff286d
    • I
      perf counters: add support for group counters · 04289bb9
      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
      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
      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
      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
  5. 08 12月, 2008 1 次提交
    • T
      performance counters: core code · 0793a61d
      Thomas Gleixner 提交于
      Implement the core kernel bits of Performance Counters subsystem.
      
      The Linux Performance Counter subsystem provides an abstraction of
      performance counter hardware capabilities. It provides per task and per
      CPU counters, and it provides event capabilities on top of those.
      
      Performance counters are accessed via special file descriptors.
      There's one file descriptor per virtual counter used.
      
      The special file descriptor is opened via the perf_counter_open()
      system call:
      
       int
       perf_counter_open(u32 hw_event_type,
                         u32 hw_event_period,
                         u32 record_type,
                         pid_t pid,
                         int cpu);
      
      The syscall returns the new fd. The fd can be used via the normal
      VFS system calls: read() can be used to read the counter, fcntl()
      can be used to set the blocking mode, etc.
      
      Multiple counters can be kept open at a time, and the counters
      can be poll()ed.
      
      See more details in Documentation/perf-counters.txt.
      Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      0793a61d