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| author | Zhenliang Wei <weizhenliang@huawei.com> | 2021-11-05 21:42:55 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-06 21:30:40 +0100 |
| commit | f7df2b1cf03af680354bd4300f48f7ea11316ce8 (patch) | |
| tree | ce57f781bffc1e9ababc5154e22f1b297cddb3ec /Documentation | |
| parent | mm/vmpressure: fix data-race with memcg->socket_pressure (diff) | |
| download | linux-f7df2b1cf03af680354bd4300f48f7ea11316ce8.tar.xz linux-f7df2b1cf03af680354bd4300f48f7ea11316ce8.zip | |
tools/vm/page_owner_sort.c: count and sort by mem
When viewing page owner information, we may be more concerned about the
total memory rather than the times of stack appears. Therefore, the
following adjustments are made:
1. Added the statistics on the total number of pages.
2. Added the optional parameter "-m" to configure the program to sort by
memory (total pages).
The general output of page_owner is as follows:
Page allocated via order XXX, ...
PFN XXX ...
// Detailed stack
Page allocated via order XXX, ...
PFN XXX ...
// Detailed stack
The original page_owner_sort ignores PFN rows, puts the remaining rows
in buf, counts the times of buf, and finally sorts them according to the
times. General output:
XXX times:
Page allocated via order XXX, ...
// Detailed stack
Now, we use regexp to extract the page order value from the buf, and
count the total pages for the buf. General output:
XXX times, XXX pages:
Page allocated via order XXX, ...
// Detailed stack
By default, it is still sorted by the times of buf; If you want to sort
by the pages nums of buf, use the new -m parameter.
Link: https://lkml.kernel.org/r/1631678242-41033-1-git-send-email-weizhenliang@huawei.com
Signed-off-by: Zhenliang Wei <weizhenliang@huawei.com>
Cc: Tang Bin <tangbin@cmss.chinamobile.com>
Cc: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Cc: Zhenliang Wei <weizhenliang@huawei.com>
Cc: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/vm/page_owner.rst | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/Documentation/vm/page_owner.rst b/Documentation/vm/page_owner.rst index 2175465c9bf2..9837fc8147dd 100644 --- a/Documentation/vm/page_owner.rst +++ b/Documentation/vm/page_owner.rst @@ -85,5 +85,26 @@ Usage cat /sys/kernel/debug/page_owner > page_owner_full.txt ./page_owner_sort page_owner_full.txt sorted_page_owner.txt + The general output of ``page_owner_full.txt`` is as follows: + + Page allocated via order XXX, ... + PFN XXX ... + // Detailed stack + + Page allocated via order XXX, ... + PFN XXX ... + // Detailed stack + + The ``page_owner_sort`` tool ignores ``PFN`` rows, puts the remaining rows + in buf, uses regexp to extract the page order value, counts the times + and pages of buf, and finally sorts them according to the times. + See the result about who allocated each page - in the ``sorted_page_owner.txt``. + in the ``sorted_page_owner.txt``. General output: + + XXX times, XXX pages: + Page allocated via order XXX, ... + // Detailed stack + + By default, ``page_owner_sort`` is sorted according to the times of buf. + If you want to sort by the pages nums of buf, use the ``-m`` parameter. |