From: Lee Revell <rlrevell@joe-job.com>
To: sylvanino b <sylvanino@gmail.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: I wrote a kernel tool for monitoring / web page
Date: Fri, 18 Feb 2005 21:52:14 -0500 [thread overview]
Message-ID: <1108781534.6040.36.camel@krustophenia.net> (raw)
In-Reply-To: <d14685de05021817333c563cc9@mail.gmail.com>
On Sat, 2005-02-19 at 02:33 +0100, sylvanino b wrote:
> Sorry, it's meant to run on linux.
> Actually, patch provided is for linux 2.6.9 + kdb 4.4
>
Cool program. It has an annoying bug where every time you go to "Open
Log File", it starts you in your home directory again. Otherwise it's a
nice utility.
I actually have a problem that this might help with. The issue is that
the scheduler seems to treat Evolution as a CPU bound rather than an
event driven, I/O bound process. The most obvious symptom is that a
real CPU bound activity like a kernel compile will cause navigating the
message list in Evolution to slow to a crawl. Evolution is perfectly
usable when no other CPU hogs are running, or when the CPU hogs are
niced, so it's definitely a scheduler issue.
My understanding of Unix schedulers is that the basic idea is to
penalize CPU bound and reward I/O bound processes by giving the former
lower dynamic priority with longer timeslice and the latter high
priority with shorter timeslice. I suspect the scheduler does not
handle interactive, event driven apps that also consume a lot of CPU due
to bloat very well. These would seem to need high priority and long
timeslices, which would require the scheduler to distinguish a process
like a kernel compile that will continually exhaust its timeslice no
matter how long, and a process like evolution that if given a long
enough timeslice will finish rendering the message and go back to sleep.
Anyway, that's my hypothesis, I'll let you know what I find out.
Lee
next prev parent reply other threads:[~2005-02-19 2:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-19 0:41 I wrote a kernel tool for monitoring / web page sylvanino b
2005-02-19 1:01 ` Lee Revell
2005-02-19 1:33 ` sylvanino b
2005-02-19 2:52 ` Lee Revell [this message]
2005-02-19 23:50 ` Florian Schmidt
2005-02-20 0:04 ` Randy.Dunlap
2005-02-20 0:17 ` Lee Revell
2005-02-20 0:23 ` sylvanino b
2005-02-19 10:10 ` Matthias-Christian Ott
2005-02-23 12:24 ` sylvanino b
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