linux-kernel - [tip:perfcounters/core] perf_counter: move PERF_RECORD

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Message-ID: <tip-58068ecf1953c1ffb315107255309ff3ee456ae5@git.kernel.org>
Date:	Wed, 8 Apr 2009 16:58:57 GMT
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl, tglx@...utronix.de,
	cjashfor@...ux.vnet.ibm.com, mingo@...e.hu
Subject: [tip:perfcounters/core] perf_counter: move PERF_RECORD_TIME

Commit-ID:  58068ecf1953c1ffb315107255309ff3ee456ae5
Gitweb:     http://git.kernel.org/tip/58068ecf1953c1ffb315107255309ff3ee456ae5
Author:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
AuthorDate: Wed, 8 Apr 2009 15:01:32 +0200
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Wed, 8 Apr 2009 18:53:31 +0200

perf_counter: move PERF_RECORD_TIME

Move PERF_RECORD_TIME so that all the fixed length items come before
the variable length ones.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
LKML-Reference: <20090408130409.307926436@...llo.nl>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 include/linux/perf_counter.h |    9 ++++-----
 kernel/perf_counter.c        |   26 +++++++++++++-------------
 2 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index fed9216..9e969c4 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -100,9 +100,9 @@ enum sw_event_ids {
 enum perf_counter_record_format {
 	PERF_RECORD_IP		= 1U << 0,
 	PERF_RECORD_TID		= 1U << 1,
-	PERF_RECORD_GROUP	= 1U << 2,
-	PERF_RECORD_CALLCHAIN	= 1U << 3,
-	PERF_RECORD_TIME	= 1U << 4,
+	PERF_RECORD_TIME	= 1U << 2,
+	PERF_RECORD_GROUP	= 1U << 3,
+	PERF_RECORD_CALLCHAIN	= 1U << 4,
 };
 
 /*
@@ -250,6 +250,7 @@ enum perf_event_type {
 	 *
 	 * 	{ u64			ip;	  } && PERF_RECORD_IP
 	 * 	{ u32			pid, tid; } && PERF_RECORD_TID
+	 * 	{ u64			time;     } && PERF_RECORD_TIME
 	 *
 	 * 	{ u64			nr;
 	 * 	  { u64 event, val; } 	cnt[nr];  } && PERF_RECORD_GROUP
@@ -259,8 +260,6 @@ enum perf_event_type {
 	 * 				kernel,
 	 * 				user;
 	 * 	  u64			ips[nr];  } && PERF_RECORD_CALLCHAIN
-	 *
-	 * 	{ u64			time;     } && PERF_RECORD_TIME
 	 * };
 	 */
 };
diff --git a/kernel/perf_counter.c b/kernel/perf_counter.c
index 2d4aebb..4dc8600 100644
--- a/kernel/perf_counter.c
+++ b/kernel/perf_counter.c
@@ -1850,6 +1850,16 @@ static void perf_counter_output(struct perf_counter *counter,
 		header.size += sizeof(tid_entry);
 	}
 
+	if (record_type & PERF_RECORD_TIME) {
+		/*
+		 * Maybe do better on x86 and provide cpu_clock_nmi()
+		 */
+		time = sched_clock();
+
+		header.type |= PERF_RECORD_TIME;
+		header.size += sizeof(u64);
+	}
+
 	if (record_type & PERF_RECORD_GROUP) {
 		header.type |= PERF_RECORD_GROUP;
 		header.size += sizeof(u64) +
@@ -1867,16 +1877,6 @@ static void perf_counter_output(struct perf_counter *counter,
 		}
 	}
 
-	if (record_type & PERF_RECORD_TIME) {
-		/*
-		 * Maybe do better on x86 and provide cpu_clock_nmi()
-		 */
-		time = sched_clock();
-
-		header.type |= PERF_RECORD_TIME;
-		header.size += sizeof(u64);
-	}
-
 	ret = perf_output_begin(&handle, counter, header.size, nmi, 1);
 	if (ret)
 		return;
@@ -1889,6 +1889,9 @@ static void perf_counter_output(struct perf_counter *counter,
 	if (record_type & PERF_RECORD_TID)
 		perf_output_put(&handle, tid_entry);
 
+	if (record_type & PERF_RECORD_TIME)
+		perf_output_put(&handle, time);
+
 	if (record_type & PERF_RECORD_GROUP) {
 		struct perf_counter *leader, *sub;
 		u64 nr = counter->nr_siblings;
@@ -1910,9 +1913,6 @@ static void perf_counter_output(struct perf_counter *counter,
 	if (callchain)
 		perf_output_copy(&handle, callchain, callchain_size);
 
-	if (record_type & PERF_RECORD_TIME)
-		perf_output_put(&handle, time);
-
 	perf_output_end(&handle);
 }
 
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