diff options
| author | Jiajian Ye | 2022-03-24 18:09:34 -0700 |
|---|---|---|
| committer | Linus Torvalds | 2022-03-24 19:06:45 -0700 |
| commit | 8ea8613a616aff184df9e3ea2d3ec39d90832867 (patch) | |
| tree | 7c7569f7a54f61e348dea4d168a7c1ba3cd173d2 /Documentation/vm | |
| parent | 194d52d771b8f7cf5bcf0f81f87dd76e492c355c (diff) | |
tools/vm/page_owner_sort.c: support for selecting by PID, TGID or task command name
When viewing page owner information, we may also need to select the blocks
by PID, TGID or task command name, which helps to get more accurate page
allocation information as needed.
Therefore, following adjustments are made:
1. Add three new options, including --pid, --tgid and --name, to support
the selection of information blocks by a specific pid, tgid and task
command name. In addtion, multiple options are allowed to be used at
the same time.
./page_owner_sort [input] [output] --pid <PID>
./page_owner_sort [input] [output] --tgid <TGID>
./page_owner_sort [input] [output] --name <TASK_COMMAND_NAME>
Assuming a scenario when a multi-threaded program, ./demo (PID =
5280), is running, and ./demo creates a child process (PID = 5281).
$ps
PID TTY TIME CMD
5215 pts/0 00:00:00 bash
5280 pts/0 00:00:00 ./demo
5281 pts/0 00:00:00 ./demo
5282 pts/0 00:00:00 ps
It would be better to filter out the records with tgid=5280 and the
task name "demo" when debugging the parent process, and the specific
usage is
./page_owner_sort [input] [output] --tgid 5280 --name demo
2. Add explanations of three new options, including --pid, --tgid and
--name, to the document.
This work is coauthored by
Shenghong Han <hanshenghong2019@email.szu.edu.cn>,
Yixuan Cao <caoyixuan2019@email.szu.edu.cn>,
Yinan Zhang <zhangyinan2019@email.szu.edu.cn>,
Chongxi Zhao <zhaochongxi2019@email.szu.edu.cn>,
Yuhong Feng <yuhongf@szu.edu.cn>.
Link: https://lkml.kernel.org/r/1646835223-7584-1-git-send-email-yejiajian2018@email.szu.edu.cn
Signed-off-by: Jiajian Ye <yejiajian2018@email.szu.edu.cn>
Cc: Sean Anderson <seanga2@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Zhenliang Wei <weizhenliang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/vm')
| -rw-r--r-- | Documentation/vm/page_owner.rst | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/vm/page_owner.rst b/Documentation/vm/page_owner.rst index d658436a5e09..3dd31fe06c05 100644 --- a/Documentation/vm/page_owner.rst +++ b/Documentation/vm/page_owner.rst @@ -129,3 +129,8 @@ Usage Filter: -f Filter out the information of blocks whose memory has been released. + + Select: + --pid <PID> Select by pid. + --tgid <TGID> Select by tgid. + --name <command> Select by task command name. |