perf_counter: Rename list_entry -> group_entry, counter_list -> group_list
This is in preparation of the big rename, but also makes sense in a standalone way: 'list_entry' is a bad name as we already have a list_entry() in list.h. Also, the 'counter list' is too vague, it doesnt tell us the purpose of that list. Clarify these names to show that it's all about the group hiearchy. Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -543,7 +543,7 @@ struct perf_pending_entry {
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*/
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struct perf_counter {
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#ifdef CONFIG_PERF_COUNTERS
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struct list_head list_entry;
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struct list_head group_entry;
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struct list_head event_entry;
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struct list_head sibling_list;
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int nr_siblings;
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@ -649,7 +649,7 @@ struct perf_counter_context {
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*/
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struct mutex mutex;
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struct list_head counter_list;
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struct list_head group_list;
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struct list_head event_list;
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int nr_counters;
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int nr_active;
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@ -258,9 +258,9 @@ list_add_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
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* leader's sibling list:
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*/
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if (group_leader == counter)
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list_add_tail(&counter->list_entry, &ctx->counter_list);
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list_add_tail(&counter->group_entry, &ctx->group_list);
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else {
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list_add_tail(&counter->list_entry, &group_leader->sibling_list);
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list_add_tail(&counter->group_entry, &group_leader->sibling_list);
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group_leader->nr_siblings++;
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}
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@ -279,13 +279,13 @@ list_del_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
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{
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struct perf_counter *sibling, *tmp;
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if (list_empty(&counter->list_entry))
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if (list_empty(&counter->group_entry))
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return;
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ctx->nr_counters--;
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if (counter->attr.inherit_stat)
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ctx->nr_stat--;
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list_del_init(&counter->list_entry);
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list_del_init(&counter->group_entry);
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list_del_rcu(&counter->event_entry);
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if (counter->group_leader != counter)
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@ -296,10 +296,9 @@ list_del_counter(struct perf_counter *counter, struct perf_counter_context *ctx)
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* upgrade the siblings to singleton counters by adding them
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* to the context list directly:
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*/
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list_for_each_entry_safe(sibling, tmp,
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&counter->sibling_list, list_entry) {
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list_for_each_entry_safe(sibling, tmp, &counter->sibling_list, group_entry) {
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list_move_tail(&sibling->list_entry, &ctx->counter_list);
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list_move_tail(&sibling->group_entry, &ctx->group_list);
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sibling->group_leader = sibling;
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}
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}
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@ -343,7 +342,7 @@ group_sched_out(struct perf_counter *group_counter,
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/*
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* Schedule out siblings (if any):
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*/
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list_for_each_entry(counter, &group_counter->sibling_list, list_entry)
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list_for_each_entry(counter, &group_counter->sibling_list, group_entry)
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counter_sched_out(counter, cpuctx, ctx);
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if (group_counter->attr.exclusive)
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@ -435,7 +434,7 @@ static void perf_counter_remove_from_context(struct perf_counter *counter)
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/*
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* If the context is active we need to retry the smp call.
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*/
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if (ctx->nr_active && !list_empty(&counter->list_entry)) {
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if (ctx->nr_active && !list_empty(&counter->group_entry)) {
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spin_unlock_irq(&ctx->lock);
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goto retry;
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}
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@ -445,7 +444,7 @@ static void perf_counter_remove_from_context(struct perf_counter *counter)
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* can remove the counter safely, if the call above did not
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* succeed.
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*/
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if (!list_empty(&counter->list_entry)) {
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if (!list_empty(&counter->group_entry)) {
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list_del_counter(counter, ctx);
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}
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spin_unlock_irq(&ctx->lock);
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@ -497,7 +496,7 @@ static void update_group_times(struct perf_counter *leader)
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struct perf_counter *counter;
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update_counter_times(leader);
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list_for_each_entry(counter, &leader->sibling_list, list_entry)
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list_for_each_entry(counter, &leader->sibling_list, group_entry)
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update_counter_times(counter);
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}
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@ -643,7 +642,7 @@ group_sched_in(struct perf_counter *group_counter,
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/*
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* Schedule in siblings as one group (if any):
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*/
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list_for_each_entry(counter, &group_counter->sibling_list, list_entry) {
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list_for_each_entry(counter, &group_counter->sibling_list, group_entry) {
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if (counter_sched_in(counter, cpuctx, ctx, cpu)) {
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partial_group = counter;
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goto group_error;
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@ -657,7 +656,7 @@ group_sched_in(struct perf_counter *group_counter,
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* Groups can be scheduled in as one unit only, so undo any
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* partial group before returning:
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*/
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list_for_each_entry(counter, &group_counter->sibling_list, list_entry) {
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list_for_each_entry(counter, &group_counter->sibling_list, group_entry) {
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if (counter == partial_group)
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break;
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counter_sched_out(counter, cpuctx, ctx);
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@ -678,7 +677,7 @@ static int is_software_only_group(struct perf_counter *leader)
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if (!is_software_counter(leader))
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return 0;
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list_for_each_entry(counter, &leader->sibling_list, list_entry)
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list_for_each_entry(counter, &leader->sibling_list, group_entry)
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if (!is_software_counter(counter))
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return 0;
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@ -842,7 +841,7 @@ perf_install_in_context(struct perf_counter_context *ctx,
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/*
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* we need to retry the smp call.
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*/
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if (ctx->is_active && list_empty(&counter->list_entry)) {
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if (ctx->is_active && list_empty(&counter->group_entry)) {
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spin_unlock_irq(&ctx->lock);
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goto retry;
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}
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@ -852,7 +851,7 @@ perf_install_in_context(struct perf_counter_context *ctx,
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* can add the counter safely, if it the call above did not
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* succeed.
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*/
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if (list_empty(&counter->list_entry))
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if (list_empty(&counter->group_entry))
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add_counter_to_ctx(counter, ctx);
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spin_unlock_irq(&ctx->lock);
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}
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@ -872,7 +871,7 @@ static void __perf_counter_mark_enabled(struct perf_counter *counter,
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counter->state = PERF_COUNTER_STATE_INACTIVE;
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counter->tstamp_enabled = ctx->time - counter->total_time_enabled;
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list_for_each_entry(sub, &counter->sibling_list, list_entry)
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list_for_each_entry(sub, &counter->sibling_list, group_entry)
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if (sub->state >= PERF_COUNTER_STATE_INACTIVE)
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sub->tstamp_enabled =
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ctx->time - sub->total_time_enabled;
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@ -1032,7 +1031,7 @@ void __perf_counter_sched_out(struct perf_counter_context *ctx,
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perf_disable();
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if (ctx->nr_active) {
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list_for_each_entry(counter, &ctx->counter_list, list_entry) {
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list_for_each_entry(counter, &ctx->group_list, group_entry) {
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if (counter != counter->group_leader)
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counter_sched_out(counter, cpuctx, ctx);
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else
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@ -1252,7 +1251,7 @@ __perf_counter_sched_in(struct perf_counter_context *ctx,
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* First go through the list and put on any pinned groups
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* in order to give them the best chance of going on.
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*/
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list_for_each_entry(counter, &ctx->counter_list, list_entry) {
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list_for_each_entry(counter, &ctx->group_list, group_entry) {
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if (counter->state <= PERF_COUNTER_STATE_OFF ||
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!counter->attr.pinned)
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continue;
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@ -1276,7 +1275,7 @@ __perf_counter_sched_in(struct perf_counter_context *ctx,
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}
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}
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list_for_each_entry(counter, &ctx->counter_list, list_entry) {
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list_for_each_entry(counter, &ctx->group_list, group_entry) {
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/*
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* Ignore counters in OFF or ERROR state, and
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* ignore pinned counters since we did them already.
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@ -1369,7 +1368,7 @@ static void perf_ctx_adjust_freq(struct perf_counter_context *ctx)
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u64 interrupts, freq;
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spin_lock(&ctx->lock);
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list_for_each_entry(counter, &ctx->counter_list, list_entry) {
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list_for_each_entry(counter, &ctx->group_list, group_entry) {
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if (counter->state != PERF_COUNTER_STATE_ACTIVE)
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continue;
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@ -1441,8 +1440,8 @@ static void rotate_ctx(struct perf_counter_context *ctx)
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* Rotate the first entry last (works just fine for group counters too):
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*/
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perf_disable();
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list_for_each_entry(counter, &ctx->counter_list, list_entry) {
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list_move_tail(&counter->list_entry, &ctx->counter_list);
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list_for_each_entry(counter, &ctx->group_list, group_entry) {
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list_move_tail(&counter->group_entry, &ctx->group_list);
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break;
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}
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perf_enable();
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@ -1498,7 +1497,7 @@ static void perf_counter_enable_on_exec(struct task_struct *task)
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spin_lock(&ctx->lock);
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list_for_each_entry(counter, &ctx->counter_list, list_entry) {
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list_for_each_entry(counter, &ctx->group_list, group_entry) {
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if (!counter->attr.enable_on_exec)
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continue;
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counter->attr.enable_on_exec = 0;
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@ -1575,7 +1574,7 @@ __perf_counter_init_context(struct perf_counter_context *ctx,
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memset(ctx, 0, sizeof(*ctx));
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spin_lock_init(&ctx->lock);
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mutex_init(&ctx->mutex);
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INIT_LIST_HEAD(&ctx->counter_list);
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INIT_LIST_HEAD(&ctx->group_list);
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INIT_LIST_HEAD(&ctx->event_list);
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atomic_set(&ctx->refcount, 1);
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ctx->task = task;
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@ -1818,7 +1817,7 @@ static int perf_counter_read_group(struct perf_counter *counter,
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size += err;
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list_for_each_entry(sub, &leader->sibling_list, list_entry) {
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list_for_each_entry(sub, &leader->sibling_list, group_entry) {
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err = perf_counter_read_entry(sub, read_format,
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buf + size);
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if (err < 0)
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@ -1948,7 +1947,7 @@ static void perf_counter_for_each(struct perf_counter *counter,
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perf_counter_for_each_child(counter, func);
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func(counter);
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list_for_each_entry(sibling, &counter->sibling_list, list_entry)
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list_for_each_entry(sibling, &counter->sibling_list, group_entry)
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perf_counter_for_each_child(counter, func);
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mutex_unlock(&ctx->mutex);
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}
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@ -2832,7 +2831,7 @@ static void perf_output_read_group(struct perf_output_handle *handle,
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perf_output_copy(handle, values, n * sizeof(u64));
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list_for_each_entry(sub, &leader->sibling_list, list_entry) {
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list_for_each_entry(sub, &leader->sibling_list, group_entry) {
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n = 0;
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if (sub != counter)
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@ -4118,7 +4117,7 @@ perf_counter_alloc(struct perf_counter_attr *attr,
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mutex_init(&counter->child_mutex);
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INIT_LIST_HEAD(&counter->child_list);
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INIT_LIST_HEAD(&counter->list_entry);
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INIT_LIST_HEAD(&counter->group_entry);
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INIT_LIST_HEAD(&counter->event_entry);
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INIT_LIST_HEAD(&counter->sibling_list);
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init_waitqueue_head(&counter->waitq);
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@ -4544,7 +4543,7 @@ static int inherit_group(struct perf_counter *parent_counter,
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child, NULL, child_ctx);
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if (IS_ERR(leader))
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return PTR_ERR(leader);
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list_for_each_entry(sub, &parent_counter->sibling_list, list_entry) {
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list_for_each_entry(sub, &parent_counter->sibling_list, group_entry) {
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child_ctr = inherit_counter(sub, parent, parent_ctx,
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child, leader, child_ctx);
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if (IS_ERR(child_ctr))
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@ -4670,8 +4669,8 @@ void perf_counter_exit_task(struct task_struct *child)
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mutex_lock_nested(&child_ctx->mutex, SINGLE_DEPTH_NESTING);
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again:
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list_for_each_entry_safe(child_counter, tmp, &child_ctx->counter_list,
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list_entry)
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list_for_each_entry_safe(child_counter, tmp, &child_ctx->group_list,
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group_entry)
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__perf_counter_exit_task(child_counter, child_ctx, child);
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/*
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@ -4679,7 +4678,7 @@ void perf_counter_exit_task(struct task_struct *child)
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* its siblings to the list, but we obtained 'tmp' before that which
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* will still point to the list head terminating the iteration.
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*/
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if (!list_empty(&child_ctx->counter_list))
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if (!list_empty(&child_ctx->group_list))
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goto again;
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mutex_unlock(&child_ctx->mutex);
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@ -4701,7 +4700,7 @@ void perf_counter_free_task(struct task_struct *task)
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mutex_lock(&ctx->mutex);
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again:
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list_for_each_entry_safe(counter, tmp, &ctx->counter_list, list_entry) {
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list_for_each_entry_safe(counter, tmp, &ctx->group_list, group_entry) {
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struct perf_counter *parent = counter->parent;
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if (WARN_ON_ONCE(!parent))
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@ -4717,7 +4716,7 @@ void perf_counter_free_task(struct task_struct *task)
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free_counter(counter);
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}
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if (!list_empty(&ctx->counter_list))
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if (!list_empty(&ctx->group_list))
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goto again;
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mutex_unlock(&ctx->mutex);
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@ -4847,7 +4846,7 @@ static void __perf_counter_exit_cpu(void *info)
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struct perf_counter_context *ctx = &cpuctx->ctx;
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struct perf_counter *counter, *tmp;
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list_for_each_entry_safe(counter, tmp, &ctx->counter_list, list_entry)
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list_for_each_entry_safe(counter, tmp, &ctx->group_list, group_entry)
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__perf_counter_remove_from_context(counter);
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}
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static void perf_counter_exit_cpu(int cpu)
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