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  1. 06 5月, 2009 2 次提交
  3. 05 5月, 2009 5 次提交
    • I
      perf_counter: fix fixed-purpose counter support on v2 Intel-PERFMON · 066d7dea
      由 Ingo Molnar 提交于 
      Fixed-purpose counters stopped working in a simple 'perf stat ls' run:

   <not counted>  cache references
   <not counted>  cache misses

Due to:

  ef7b3e09: perf_counter, x86: remove vendor check in fixed_mode_idx()

Which made x86_pmu.num_counters_fixed matter: if it's nonzero, the
fixed-purpose counters are utilized.

But on v2 perfmon this field is not set (despite there being
fixed-purpose PMCs). So add a quirk to set the number of fixed-purpose
counters to at least three.

[ Impact: add quirk for three fixed-purpose counters on certain Intel CPUs ]

Cc: Robert Richter <robert.richter@amd.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241002046-8832-28-git-send-email-robert.richter@amd.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      066d7dea
    • I
      perf_counter: convert perf_resource_mutex to a spinlock · 1dce8d99
      由 Ingo Molnar 提交于 
      Now percpu counters can be initialized very early. But the init
sequence uses mutex_lock(). Fortunately, perf_resource_mutex should
be a spinlock anyway, so convert it.

[ Impact: fix crash due to early init mutex use ]

LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      1dce8d99
    • I
      perf_counter: initialize the per-cpu context earlier · 0d905bca
      由 Ingo Molnar 提交于 
      percpu scheduling for perfcounters wants to take the context lock,
but that lock first needs to be initialized. Currently it is an
early_initcall() - but that is too late, the task tick runs much
sooner than that.

Call it explicitly from the scheduler init sequence instead.

[ Impact: fix access-before-init crash ]

LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      0d905bca
    • P
      perf_counter: x86: fixup nmi_watchdog vs perf_counter boo-boo · ba77813a
      由 Peter Zijlstra 提交于 
      Invert the atomic_inc_not_zero() test so that we will indeed detect the
first activation.

Also rename the global num_counters, since its easy to confuse with
x86_pmu.num_counters.

[ Impact: fix non-working perfcounters on AMD CPUs, cleanup ]
Signed-off-by: NPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1241455664.7620.4938.camel@twins>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      ba77813a
    • I
      perf_counter: round-robin per-CPU counters too · b82914ce
      由 Ingo Molnar 提交于 
      This used to be unstable when we had the rq->lock dependencies,
but now that they are that of the past we can turn on percpu
counter RR too.

[ Impact: handle counter over-commit for per-CPU counters too ]

LKML-Reference: <new-submission>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      b82914ce
  5. 03 5月, 2009 1 次提交
  7. 02 5月, 2009 4 次提交
  9. 01 5月, 2009 10 次提交
  11. 30 4月, 2009 18 次提交