diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/perf_counter.c | 42 |
1 files changed, 12 insertions, 30 deletions
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c index 84d85ab4e161..56b7eb53d673 100644 --- a/kernel/perf_counter.c +++ b/kernel/perf_counter.c @@ -974,9 +974,6 @@ int perf_counter_task_disable(void) curr_rq_lock_irq_save(&flags); cpu = smp_processor_id(); - /* force the update of the task clock: */ - __task_delta_exec(curr, 1); - perf_counter_task_sched_out(curr, cpu); spin_lock(&ctx->lock); @@ -1017,9 +1014,6 @@ int perf_counter_task_enable(void) curr_rq_lock_irq_save(&flags); cpu = smp_processor_id(); - /* force the update of the task clock: */ - __task_delta_exec(curr, 1); - perf_counter_task_sched_out(curr, cpu); spin_lock(&ctx->lock); @@ -2347,38 +2341,28 @@ static const struct hw_perf_counter_ops perf_ops_cpu_clock = { * Software counter: task time clock */ -/* - * Called from within the scheduler: - */ -static u64 task_clock_perf_counter_val(struct perf_counter *counter, int update) -{ - struct task_struct *curr = counter->task; - u64 delta; - - delta = __task_delta_exec(curr, update); - - return curr->se.sum_exec_runtime + delta; -} - -static void task_clock_perf_counter_update(struct perf_counter *counter, u64 now) +static void task_clock_perf_counter_update(struct perf_counter *counter) { - u64 prev; + u64 prev, now; s64 delta; - prev = atomic64_read(&counter->hw.prev_count); - - atomic64_set(&counter->hw.prev_count, now); + update_context_time(counter->ctx); + now = counter->ctx->time; + prev = atomic64_xchg(&counter->hw.prev_count, now); delta = now - prev; - atomic64_add(delta, &counter->count); } static int task_clock_perf_counter_enable(struct perf_counter *counter) { struct hw_perf_counter *hwc = &counter->hw; + u64 now; + + update_context_time(counter->ctx); + now = counter->ctx->time; - atomic64_set(&hwc->prev_count, task_clock_perf_counter_val(counter, 0)); + atomic64_set(&hwc->prev_count, now); hrtimer_init(&hwc->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); hwc->hrtimer.function = perf_swcounter_hrtimer; if (hwc->irq_period) { @@ -2393,14 +2377,12 @@ static int task_clock_perf_counter_enable(struct perf_counter *counter) static void task_clock_perf_counter_disable(struct perf_counter *counter) { hrtimer_cancel(&counter->hw.hrtimer); - task_clock_perf_counter_update(counter, - task_clock_perf_counter_val(counter, 0)); + task_clock_perf_counter_update(counter); } static void task_clock_perf_counter_read(struct perf_counter *counter) { - task_clock_perf_counter_update(counter, - task_clock_perf_counter_val(counter, 1)); + task_clock_perf_counter_update(counter); } static const struct hw_perf_counter_ops perf_ops_task_clock = { |