perf_counter: unify irq output code

Impact: cleanup

Having 3 slightly different copies of the same code around does nobody
any good. First step in revamping the output format.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Orig-LKML-Reference: <20090319194233.929962222@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 3 insertions, 101 deletions

diff --git a/arch/powerpc/kernel/perf_counter.c b/arch/powerpc/kernel/perf_counter.c
index 26f69dc7130..88b72eb4af1 100644
--- a/arch/powerpc/kernel/perf_counter.c
+++ b/arch/powerpc/kernel/perf_counter.c
@@ -663,41 +663,6 @@ void perf_counter_do_pending(void)
 }
 
 /*
- * Record data for an irq counter.
- * This function was lifted from the x86 code; maybe it should
- * go in the core?
- */
-static void perf_store_irq_data(struct perf_counter *counter, u64 data)
-{
-	struct perf_data *irqdata = counter->irqdata;
-
-	if (irqdata->len > PERF_DATA_BUFLEN - sizeof(u64)) {
-		irqdata->overrun++;
-	} else {
-		u64 *p = (u64 *) &irqdata->data[irqdata->len];
-
-		*p = data;
-		irqdata->len += sizeof(u64);
-	}
-}
-
-/*
- * Record all the values of the counters in a group
- */
-static void perf_handle_group(struct perf_counter *counter)
-{
-	struct perf_counter *leader, *sub;
-
-	leader = counter->group_leader;
-	list_for_each_entry(sub, &leader->sibling_list, list_entry) {
-		if (sub != counter)
-			sub->hw_ops->read(sub);
-		perf_store_irq_data(counter, sub->hw_event.event_config);
-		perf_store_irq_data(counter, atomic64_read(&sub->count));
-	}
-}
-
-/*
  * A counter has overflowed; update its count and record
  * things if requested.  Note that interrupts are hard-disabled
  * here so there is no possibility of being interrupted.
@@ -736,20 +701,8 @@ static void record_and_restart(struct perf_counter *counter, long val,
 	/*
 	 * Finally record data if requested.
 	 */
-	if (record) {
-		switch (counter->hw_event.record_type) {
-		case PERF_RECORD_SIMPLE:
-			break;
-		case PERF_RECORD_IRQ:
-			perf_store_irq_data(counter, instruction_pointer(regs));
-			counter->wakeup_pending = 1;
-			break;
-		case PERF_RECORD_GROUP:
-			perf_handle_group(counter);
-			counter->wakeup_pending = 1;
-			break;
-		}
-	}
+	if (record)
+		perf_counter_output(counter, 1, regs);
 }
 
 /*
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index d844ae41d5a..902282d68b0 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -674,20 +674,6 @@ static void pmc_generic_disable(struct perf_counter *counter)
 	x86_perf_counter_update(counter, hwc, idx);
 }
 
-static void perf_store_irq_data(struct perf_counter *counter, u64 data)
-{
-	struct perf_data *irqdata = counter->irqdata;
-
-	if (irqdata->len > PERF_DATA_BUFLEN - sizeof(u64)) {
-		irqdata->overrun++;
-	} else {
-		u64 *p = (u64 *) &irqdata->data[irqdata->len];
-
-		*p = data;
-		irqdata->len += sizeof(u64);
-	}
-}
-
 /*
  * Save and restart an expired counter. Called by NMI contexts,
  * so it has to be careful about preempting normal counter ops:
@@ -704,22 +690,6 @@ static void perf_save_and_restart(struct perf_counter *counter)
 		__pmc_generic_enable(counter, hwc, idx);
 }
 
-static void
-perf_handle_group(struct perf_counter *sibling, u64 *status, u64 *overflown)
-{
-	struct perf_counter *counter, *group_leader = sibling->group_leader;
-
-	/*
-	 * Store sibling timestamps (if any):
-	 */
-	list_for_each_entry(counter, &group_leader->sibling_list, list_entry) {
-
-		x86_perf_counter_update(counter, &counter->hw, counter->hw.idx);
-		perf_store_irq_data(sibling, counter->hw_event.event_config);
-		perf_store_irq_data(sibling, atomic64_read(&counter->count));
-	}
-}
-
 /*
  * Maximum interrupt frequency of 100KHz per CPU
  */
@@ -754,28 +724,7 @@ again:
 			continue;
 
 		perf_save_and_restart(counter);
-
-		switch (counter->hw_event.record_type) {
-		case PERF_RECORD_SIMPLE:
-			continue;
-		case PERF_RECORD_IRQ:
-			perf_store_irq_data(counter, instruction_pointer(regs));
-			break;
-		case PERF_RECORD_GROUP:
-			perf_handle_group(counter, &status, &ack);
-			break;
-		}
-		/*
-		 * From NMI context we cannot call into the scheduler to
-		 * do a task wakeup - but we mark these generic as
-		 * wakeup_pending and initate a wakeup callback:
-		 */
-		if (nmi) {
-			counter->wakeup_pending = 1;
-			set_tsk_thread_flag(current, TIF_PERF_COUNTERS);
-		} else {
-			wake_up(&counter->waitq);
-		}
+		perf_counter_output(counter, nmi, regs);
 	}
 
 	hw_perf_ack_status(ack);