mm-tracepoint: fix documentation and examples
We renamed the page-free mm tracepoints.
Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Minchan Kim <minchan.kim@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/Documentation/trace/tracepoint-analysis.txt b/Documentation/trace/tracepoint-analysis.txt
index 87bee3c..058cc6c 100644
--- a/Documentation/trace/tracepoint-analysis.txt
+++ b/Documentation/trace/tracepoint-analysis.txt
@@ -93,14 +93,14 @@
for a duration of time can be examined.
$ perf stat -a \
- -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \
- -e kmem:mm_pagevec_free \
+ -e kmem:mm_page_alloc -e kmem:mm_page_free \
+ -e kmem:mm_page_free_batched \
sleep 10
Performance counter stats for 'sleep 10':
9630 kmem:mm_page_alloc
- 2143 kmem:mm_page_free_direct
- 7424 kmem:mm_pagevec_free
+ 2143 kmem:mm_page_free
+ 7424 kmem:mm_page_free_batched
10.002577764 seconds time elapsed
@@ -119,15 +119,15 @@
Events can be activated and tracked for the duration of a process on a local
basis using PCL such as follows.
- $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \
- -e kmem:mm_pagevec_free ./hackbench 10
+ $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free \
+ -e kmem:mm_page_free_batched ./hackbench 10
Time: 0.909
Performance counter stats for './hackbench 10':
17803 kmem:mm_page_alloc
- 12398 kmem:mm_page_free_direct
- 4827 kmem:mm_pagevec_free
+ 12398 kmem:mm_page_free
+ 4827 kmem:mm_page_free_batched
0.973913387 seconds time elapsed
@@ -146,8 +146,8 @@
performance analyst to do it by hand. In the event that the discrete event
occurrences are useful to the performance analyst, then perf can be used.
- $ perf stat --repeat 5 -e kmem:mm_page_alloc -e kmem:mm_page_free_direct
- -e kmem:mm_pagevec_free ./hackbench 10
+ $ perf stat --repeat 5 -e kmem:mm_page_alloc -e kmem:mm_page_free
+ -e kmem:mm_page_free_batched ./hackbench 10
Time: 0.890
Time: 0.895
Time: 0.915
@@ -157,8 +157,8 @@
Performance counter stats for './hackbench 10' (5 runs):
16630 kmem:mm_page_alloc ( +- 3.542% )
- 11486 kmem:mm_page_free_direct ( +- 4.771% )
- 4730 kmem:mm_pagevec_free ( +- 2.325% )
+ 11486 kmem:mm_page_free ( +- 4.771% )
+ 4730 kmem:mm_page_free_batched ( +- 2.325% )
0.982653002 seconds time elapsed ( +- 1.448% )
@@ -168,15 +168,15 @@
Using --repeat, it is also possible to view how events are fluctuating over
time on a system-wide basis using -a and sleep.
- $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \
- -e kmem:mm_pagevec_free \
+ $ perf stat -e kmem:mm_page_alloc -e kmem:mm_page_free \
+ -e kmem:mm_page_free_batched \
-a --repeat 10 \
sleep 1
Performance counter stats for 'sleep 1' (10 runs):
1066 kmem:mm_page_alloc ( +- 26.148% )
- 182 kmem:mm_page_free_direct ( +- 5.464% )
- 890 kmem:mm_pagevec_free ( +- 30.079% )
+ 182 kmem:mm_page_free ( +- 5.464% )
+ 890 kmem:mm_page_free_batched ( +- 30.079% )
1.002251757 seconds time elapsed ( +- 0.005% )
@@ -220,8 +220,8 @@
data must be recorded. At the time of writing, this required root:
$ perf record -c 1 \
- -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \
- -e kmem:mm_pagevec_free \
+ -e kmem:mm_page_alloc -e kmem:mm_page_free \
+ -e kmem:mm_page_free_batched \
./hackbench 10
Time: 0.894
[ perf record: Captured and wrote 0.733 MB perf.data (~32010 samples) ]
@@ -260,8 +260,8 @@
at it:
$ perf record -c 1 -f \
- -e kmem:mm_page_alloc -e kmem:mm_page_free_direct \
- -e kmem:mm_pagevec_free \
+ -e kmem:mm_page_alloc -e kmem:mm_page_free \
+ -e kmem:mm_page_free_batched \
-p `pidof X`
This was interrupted after a few seconds and