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authorJiajian Ye <yejiajian2018@email.szu.edu.cn>2022-04-28 23:15:56 -0700
committerakpm <akpm@linux-foundation.org>2022-04-28 23:15:56 -0700
commit75382a2dca0e9e9e57e88b479cf537549461a934 (patch)
tree55ad5eb926ca518f47e6add87d6cbceed5857db6 /Documentation
parent329687a03d18143f491b535d22be1cccc291bb58 (diff)
tools/vm/page_owner_sort.c: support for multi-value selection in single argument
When viewing page owner information, we may want to select blocks whose PID/TGID/TASK_COMM_NAME appears in a user-specified list for data analysis and aggregation. But currently page_owner_sort only supports selecting blocks associated with only one specified PID/TGID/TASK_COMM_NAME. Therefore, following adjustments are made to fix the problem: 1. Enhance selecting function to support the selection of multiple PIDs/TGIDs/TASK_COMM_NAMEs. The enhanced usages are as follows: --pid <pidlist> Select by pid. This selects the blocks whose PID numbers appear in <pidlist>. --tgid <tgidlist> Select by tgid. This selects the blocks whose TGID numbers appear in <tgidlist>. --name <cmdlist> Select by task command name. This selects the blocks whose task command name appear in <cmdlist>. Where <pidlist>, <tgidlist>, <cmdlist> are single arguments in the form of a comma-separated list,which offers a way to specify individual selecting rules. For example, if you want to select blocks whose tgids are 1, 2 or 3, you have to use 4 commands as follows: ./page_owner_sort <input> <output1> --tgid=1 ./page_owner_sort <input> <output2> --tgid=2 ./page_owner_sort <input> <output3> --tgid=3 cat <output1> <output2> <output3> > <output> With this patch, you can use only 1 command to obtain the same result as above: ./page_owner_sort <input> <output1> --tgid=1,2,3 2. Update explanations of --pid, --tgid and --name in the function usage() and the document(Documents/vm/page_owner.rst). This work is coauthored by Yixuan Cao Shenghong Han Yinan Zhang Chongxi Zhao Yuhong Feng Yongqiang Liu Link: https://lkml.kernel.org/r/20220401024856.767-2-yejiajian2018@email.szu.edu.cn Signed-off-by: Jiajian Ye <yejiajian2018@email.szu.edu.cn> Cc: Chongxi Zhao <zhaochongxi2019@email.szu.edu.cn> Cc: Shenghong Han <hanshenghong2019@email.szu.edu.cn> Cc: Yinan Zhang <zhangyinan2019@email.szu.edu.cn> Cc: Yixuan Cao <caoyixuan2019@email.szu.edu.cn> Cc: Yongqiang Liu <liuyongqiang13@huawei.com> Cc: Yuhong Feng <yuhongf@szu.edu.cn> Cc: Haowen Bai <baihaowen@meizu.com> Cc: Sean Anderson <seanga2@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/vm/page_owner.rst20
1 files changed, 15 insertions, 5 deletions
diff --git a/Documentation/vm/page_owner.rst b/Documentation/vm/page_owner.rst
index 7e0c3f574e78..3102f91d635c 100644
--- a/Documentation/vm/page_owner.rst
+++ b/Documentation/vm/page_owner.rst
@@ -129,7 +129,6 @@ Usage
Specify culling rules.Culling syntax is key[,key[,...]].Choose a
multi-letter key from the **STANDARD FORMAT SPECIFIERS** section.
-
<rules> is a single argument in the form of a comma-separated list,
which offers a way to specify individual culling rules. The recognized
keywords are described in the **STANDARD FORMAT SPECIFIERS** section below.
@@ -137,7 +136,6 @@ Usage
the STANDARD SORT KEYS section below. Mixed use of abbreviated and
complete-form of keys is allowed.
-
Examples:
./page_owner_sort <input> <output> --cull=stacktrace
./page_owner_sort <input> <output> --cull=st,pid,name
@@ -147,9 +145,21 @@ Usage
-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.
+ --pid <pidlist> Select by pid. This selects the blocks whose process ID
+ numbers appear in <pidlist>.
+ --tgid <tgidlist> Select by tgid. This selects the blocks whose thread
+ group ID numbers appear in <tgidlist>.
+ --name <cmdlist> Select by task command name. This selects the blocks whose
+ task command name appear in <cmdlist>.
+
+ <pidlist>, <tgidlist>, <cmdlist> are single arguments in the form of a comma-separated list,
+ which offers a way to specify individual selecting rules.
+
+
+ Examples:
+ ./page_owner_sort <input> <output> --pid=1
+ ./page_owner_sort <input> <output> --tgid=1,2,3
+ ./page_owner_sort <input> <output> --name name1,name2
STANDARD FORMAT SPECIFIERS
==========================