diff options
| -rw-r--r-- | arch/powerpc/kernel/perf_counter.c | 9 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/perf_counter.c | 15 | ||||
| -rw-r--r-- | include/linux/perf_counter.h | 6 | ||||
| -rw-r--r-- | kernel/perf_counter.c | 9 |
4 files changed, 28 insertions, 11 deletions
diff --git a/arch/powerpc/kernel/perf_counter.c b/arch/powerpc/kernel/perf_counter.c index 5e0bf399c433..4990ce2e5f08 100644 --- a/arch/powerpc/kernel/perf_counter.c +++ b/arch/powerpc/kernel/perf_counter.c @@ -767,6 +767,7 @@ static void power_pmu_unthrottle(struct perf_counter *counter) perf_disable(); power_pmu_read(counter); left = counter->hw.sample_period; + counter->hw.last_period = left; val = 0; if (left < 0x80000000L) val = 0x80000000L - left; @@ -937,7 +938,8 @@ const struct pmu *hw_perf_counter_init(struct perf_counter *counter) counter->hw.config = events[n]; counter->hw.counter_base = cflags[n]; - atomic64_set(&counter->hw.period_left, counter->hw.sample_period); + counter->hw.last_period = counter->hw.sample_period; + atomic64_set(&counter->hw.period_left, counter->hw.last_period); /* * See if we need to reserve the PMU. @@ -1002,8 +1004,9 @@ static void record_and_restart(struct perf_counter *counter, long val, */ if (record) { struct perf_sample_data data = { - .regs = regs, - .addr = 0, + .regs = regs, + .addr = 0, + .period = counter->hw.last_period, }; if (counter->attr.sample_type & PERF_SAMPLE_ADDR) { diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c index 82a23d487f92..57ae1bec81be 100644 --- a/arch/x86/kernel/cpu/perf_counter.c +++ b/arch/x86/kernel/cpu/perf_counter.c @@ -698,6 +698,7 @@ static int __hw_perf_counter_init(struct perf_counter *counter) if (!hwc->sample_period) { hwc->sample_period = x86_pmu.max_period; + hwc->last_period = hwc->sample_period; atomic64_set(&hwc->period_left, hwc->sample_period); } @@ -880,12 +881,14 @@ x86_perf_counter_set_period(struct perf_counter *counter, if (unlikely(left <= -period)) { left = period; atomic64_set(&hwc->period_left, left); + hwc->last_period = period; ret = 1; } if (unlikely(left <= 0)) { left += period; atomic64_set(&hwc->period_left, left); + hwc->last_period = period; ret = 1; } /* @@ -1257,9 +1260,12 @@ static int amd_pmu_handle_irq(struct pt_regs *regs) if (val & (1ULL << (x86_pmu.counter_bits - 1))) continue; - /* counter overflow */ - handled = 1; - inc_irq_stat(apic_perf_irqs); + /* + * counter overflow + */ + handled = 1; + data.period = counter->hw.last_period; + if (!x86_perf_counter_set_period(counter, hwc, idx)) continue; @@ -1267,6 +1273,9 @@ static int amd_pmu_handle_irq(struct pt_regs *regs) amd_pmu_disable_counter(hwc, idx); } + if (handled) + inc_irq_stat(apic_perf_irqs); + return handled; } diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h index d8c0eb480f9a..5b966472b458 100644 --- a/include/linux/perf_counter.h +++ b/include/linux/perf_counter.h @@ -366,6 +366,7 @@ struct hw_perf_counter { }; atomic64_t prev_count; u64 sample_period; + u64 last_period; atomic64_t period_left; u64 interrupts; @@ -606,8 +607,9 @@ extern int hw_perf_group_sched_in(struct perf_counter *group_leader, extern void perf_counter_update_userpage(struct perf_counter *counter); struct perf_sample_data { - struct pt_regs *regs; - u64 addr; + struct pt_regs *regs; + u64 addr; + u64 period; }; extern int perf_counter_overflow(struct perf_counter *counter, int nmi, diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index 4fe85e804f43..8b89b40bd0f0 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -2495,7 +2495,7 @@ static void perf_counter_output(struct perf_counter *counter, int nmi, perf_output_put(&handle, cpu_entry); if (sample_type & PERF_SAMPLE_PERIOD) - perf_output_put(&handle, counter->hw.sample_period); + perf_output_put(&handle, data->period); /* * XXX PERF_SAMPLE_GROUP vs inherited counters seems difficult. @@ -3040,11 +3040,13 @@ static void perf_swcounter_set_period(struct perf_counter *counter) if (unlikely(left <= -period)) { left = period; atomic64_set(&hwc->period_left, left); + hwc->last_period = period; } if (unlikely(left <= 0)) { left += period; atomic64_add(period, &hwc->period_left); + hwc->last_period = period; } atomic64_set(&hwc->prev_count, -left); @@ -3086,8 +3088,9 @@ static void perf_swcounter_overflow(struct perf_counter *counter, int nmi, struct pt_regs *regs, u64 addr) { struct perf_sample_data data = { - .regs = regs, - .addr = addr, + .regs = regs, + .addr = addr, + .period = counter->hw.last_period, }; perf_swcounter_update(counter); |