linux-kernel - Re: [Announce] Development release 0.1 of the LatencyTOP tool

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

Date:	Fri, 18 Jan 2008 12:02:11 -0700
From:	Zan Lynx <zlynx@....org>
To:	Arjan van de Ven <arjan@...ux.intel.com>
Cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [Announce] Development release 0.1 of the LatencyTOP tool


On Fri, 2008-01-18 at 09:36 -0800, Arjan van de Ven wrote:
> The Intel Open Source Technology Center is pleased to announce the
> release of version 0.1 of LatencyTOP, a tool for developers to visualize
> system latencies.
> 
> http://www.latencytop.org
> 
> Slow servers, Skipping audio, Jerky video --everyone knows the symptoms
> of latency. But to know what's really going on in the system, what's causing
> the latency, and how to fix it... those are difficult questions without
> good answers right now.
[cut]

Just curious...

My biggest latency problems (as observed by me, the user) happen when a
program needs memory, or launching a new program, and the kernel begins
forces dirty memory to disk.  This results in an unholy seek storm of
mixed writes (flushing, maybe a little swap) and reads (new program
loading).  Streaming audio/video almost always starts freezing up during
this as well.

I don't suppose LatencyTop would help track anything down in that case,
would it?
-- 
Zan Lynx <zlynx@....org>

Download attachment "signature.asc" of type "application/pgp-signature" (190 bytes)