linux-kernel - [PATCH 0/2] Sleep Profiling v2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <1324404558-353-1-git-send-email-asharma@fb.com>
Date:	Tue, 20 Dec 2011 10:09:16 -0800
From:	Arun Sharma <asharma@...com>
To:	linux-kernel@...r.kernel.org
Cc:	Arun Sharma <asharma@...com>
Subject: [PATCH 0/2] Sleep Profiling v2

Changes since v1:

* Define a new sched_stat tracepoint
* Rebased to -tip

When debugging latency, users want to know where their code
is executing on the CPU (cycle profiling) as well as where 
it's waiting sleeping or waiting for IO. The following patch set
tries to address the latter.

Normal users can use this tracepoint without root privileges
and on a system with lots of context switches, load can be
reduced by filtering out uninteresting switches.

Sample command lines:

perf record -gPe sched:sched_stat_sleeptime --filter "sleeptime > 10000" -- ./test
perf report --stdio -g graph -G

Arun Sharma (2):
  sched: Retain sleep/block information
  tracing, sched: Add a new tracepoint for sleeptime

 include/trace/events/sched.h |   48 ++++++++++++++++++++++++++++++++++++++++++
 kernel/sched/core.c          |    1 +
 kernel/sched/fair.c          |    6 +++-
 3 files changed, 53 insertions(+), 2 deletions(-)

-- 
1.7.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/