From: Michal Hocko <mhocko@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Joe Perches <joe@perches.com>, Jann Horn <jann@thejh.net>,
linux-mm@kvack.org, LKML <linux-kernel@vger.kernel.org>
Subject: [PATCH 0/2] fs, proc: optimize smaps output formatting
Date: Fri, 19 Aug 2016 12:12:58 +0200 [thread overview]
Message-ID: <1471601580-17999-1-git-send-email-mhocko@kernel.org> (raw)
In-Reply-To: <1471519888-13829-1-git-send-email-mhocko@kernel.org>
Hi,
this is rebased on top of next-20160818. Joe has pointed out that
meminfo is using a similar trick so I have extracted guts of what we
have already and made it more generic to be usable for smaps as well
(patch 1). The second patch then replaces seq_printf with seq_write
and show_val_kb which should have smaller overhead and my measuring (in
kvm) shows quite a nice improvements. I hope kvm is not playing tricks
on me but I didn't get to test on a real HW.
Michal Hocko (2):
proc, meminfo: abstract show_val_kb
proc, smaps: reduce printing overhead
fs/proc/internal.h | 17 ++++++++++
fs/proc/meminfo.c | 93 ++++++++++++++++++++++++++----------------------------
fs/proc/task_mmu.c | 58 +++++++++++-----------------------
3 files changed, 81 insertions(+), 87 deletions(-)
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next prev parent reply other threads:[~2016-08-19 10:13 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-18 11:31 [PATCH] proc, smaps: reduce printing overhead Michal Hocko
2016-08-18 13:26 ` Joe Perches
2016-08-18 14:26 ` Michal Hocko
2016-08-18 14:41 ` Joe Perches
2016-08-18 14:41 ` Michal Hocko
2016-08-18 14:46 ` Joe Perches
2016-08-18 14:58 ` Michal Hocko
2016-08-18 15:23 ` Joe Perches
2016-08-18 16:42 ` Michal Hocko
2016-08-19 10:12 ` Michal Hocko [this message]
2016-08-19 10:12 ` [PATCH 1/2] proc, meminfo: abstract show_val_kb Michal Hocko
2016-08-26 2:54 ` [lkp] [proc, meminfo] dd3b422c11: stderr.Signal#(FPE)caught_by_ps(procps-ng_version#) kernel test robot
2016-08-19 10:13 ` [PATCH 2/2] proc, smaps: reduce printing overhead Michal Hocko
2016-08-19 17:43 ` [PATCH 0/2] fs, proc: optimize smaps output formatting Joe Perches
2016-08-19 20:18 ` Joe Perches
2016-08-20 7:29 ` Michal Hocko
2016-08-20 7:55 ` Joe Perches
2016-08-20 8:00 ` [PATCH 0/2] seq: Speed up /proc/<pid>/smaps Joe Perches
2016-08-20 8:00 ` [PATCH 1/2] seq_file: Add __seq_open_private_bufsize for seq file_operation sizes Joe Perches
2016-08-20 8:00 ` [PATCH 2/2] proc: task_mmu: Reduce output processing cpu time Joe Perches
2016-08-22 7:24 ` Michal Hocko
2016-08-22 8:00 ` Joe Perches
2016-08-22 8:30 ` Joe Perches
2016-08-22 12:09 ` Michal Hocko
2016-08-23 15:14 ` [PATCH] proc, smaps: reduce printing overhead Michal Hocko
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