From: Eugene Lubarsky <elubarsky.linux@gmail.com>
To: linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, adobriyan@gmail.com,
avagin@gmail.com, dsahern@gmail.com
Subject: [RFC PATCH 0/5] Introduce /proc/all/ to gather stats from all processes
Date: Tue, 11 Aug 2020 00:58:47 +1000 [thread overview]
Message-ID: <20200810145852.9330-1-elubarsky.linux@gmail.com> (raw)
This is an idea for substantially reducing the number of syscalls needed
by monitoring tools whilst mostly re-using the existing API.
The proposed files in this proof-of-concept patch set are:
* /proc/all/stat
A stat line for each process in the existing format.
* /proc/all/statm
statm lines but starting with a PID column.
* /proc/all/status
status info for all processes in the existing format.
* /proc/all/io
The existing /proc/pid/io data but formatted as a single line for
each process, similarly to stat/statm, with a PID column added.
* /proc/all/statx
Gathers info from stat, statm and io; the purpose is actually
not so much to reduce syscalls but to help userspace be more
efficient by not having to store data in e.g. hashtables in order
to gather it from separate /proc/all/ files.
The format proposed here starts with the unchanged stat line
and begins the other info with a few characters, repeating for
each process:
...
25 (cat) R 1 1 0 0 -1 4194304 185 0 16 0 2 0 0 0 20 ...
m 662 188 167 5 0 112 0
io 4292 0 12 0 0 0 0
...
There has been a proposal with some overlapping goals: /proc/task-diag
(https://github.com/avagin/linux-task-diag), but I'm not sure about
its current status.
Best Wishes,
Eugene
Eugene Lubarsky (5):
fs/proc: Introduce /proc/all/stat
fs/proc: Introduce /proc/all/statm
fs/proc: Introduce /proc/all/status
fs/proc: Introduce /proc/all/io
fs/proc: Introduce /proc/all/statx
fs/proc/base.c | 215 +++++++++++++++++++++++++++++++++++++++++++--
fs/proc/internal.h | 1 +
fs/proc/root.c | 1 +
3 files changed, 210 insertions(+), 7 deletions(-)
--
2.25.1
next reply other threads:[~2020-08-10 14:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-10 14:58 Eugene Lubarsky [this message]
2020-08-10 14:58 ` [RFC PATCH 1/5] fs/proc: Introduce /proc/all/stat Eugene Lubarsky
2020-08-10 14:58 ` [RFC PATCH 2/5] fs/proc: Introduce /proc/all/statm Eugene Lubarsky
2020-08-10 14:58 ` [RFC PATCH 3/5] fs/proc: Introduce /proc/all/status Eugene Lubarsky
2020-08-10 14:58 ` [RFC PATCH 4/5] fs/proc: Introduce /proc/all/io Eugene Lubarsky
2020-08-10 14:58 ` [RFC PATCH 5/5] fs/proc: Introduce /proc/all/statx Eugene Lubarsky
2020-08-10 15:04 ` [RFC PATCH 0/5] Introduce /proc/all/ to gather stats from all processes Greg KH
2020-08-10 15:27 ` Eugene Lubarsky
2020-08-10 15:41 ` Greg KH
2020-08-25 9:59 ` Eugene Lubarsky
2020-08-12 7:51 ` Andrei Vagin
2020-08-13 4:47 ` David Ahern
2020-08-13 8:03 ` Andrei Vagin
2020-08-13 15:01 ` Eugene Lubarsky
2020-08-20 17:41 ` Andrei Vagin
2020-08-25 10:00 ` Eugene Lubarsky
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