Hi,
I wrote a kernel tool for my personnal usage which goal is to keep a
record of recent task preemptions and interruptions that appears under
linux. Although the record is short (a few minutes only), It can help
to analyse scheduling algorithm efficiency and also driver timing
issues. The user can access data from user-space, through proc
filesystem and analyze it with a graphics tool. Then, since it's also
availlable within KDB, it can give clues and help for debugging.
So far, the tool is not a big deal, but not trivial either. When It is
running, the tool doesn't overload the system. And when it is not
running, it's just transparent.
I did a webpage for it, you can check it out at:
http://membres.lycos.fr/kernelanalyzer/
If you have any comment/critics, don't hesitate to share it
Thanks,
Sylvain
On Sat, 2005-02-19 at 01:41 +0100, sylvanino b wrote:
> I did a webpage for it, you can check it out at:
> http://membres.lycos.fr/kernelanalyzer/
>
> If you have any comment/critics, don't hesitate to share it
Is this meant to run on a Windows system or something? The screenshots
look like Windows, and the archive is a .rar file.
I was not able to extract the .rar file. File roller does not work at
all because it tries to pass the nonexistent "-c" switch to unrar. And
it won't unrar manually:
rlrevell@mindpipe:~/cvs$ unrar kernelanalyzer.rar 2>&1 | head -20
unrar 0.0.1 Copyright (c) 2004 Ben Asselstine
Extracting from /smb/rlrevell/cvs/kernelanalyzer.rar
Extracting download/image/ex1.JPG Failed
Extracting download/image/ex2.JPG Failed
Extracting download/image/schema.PNG Failed
Please use standard Linux file formats like .tar.gz instead of oddballs like .rar.
Lee
Hi,
Sorry, it's meant to run on linux.
Actually, patch provided is for linux 2.6.9 + kdb 4.4
I have uploaded a new tarball and updated the webpage.
should be ok,
Sylvain
On Fri, 18 Feb 2005 20:01:55 -0500, Lee Revell <[email protected]> wrote:
> On Sat, 2005-02-19 at 01:41 +0100, sylvanino b wrote:
> > I did a webpage for it, you can check it out at:
> > http://membres.lycos.fr/kernelanalyzer/
> >
> > If you have any comment/critics, don't hesitate to share it
>
> Is this meant to run on a Windows system or something? The screenshots
> look like Windows, and the archive is a .rar file.
>
> I was not able to extract the .rar file. File roller does not work at
> all because it tries to pass the nonexistent "-c" switch to unrar. And
> it won't unrar manually:
>
> rlrevell@mindpipe:~/cvs$ unrar kernelanalyzer.rar 2>&1 | head -20
>
> unrar 0.0.1 Copyright (c) 2004 Ben Asselstine
>
> Extracting from /smb/rlrevell/cvs/kernelanalyzer.rar
>
> Extracting download/image/ex1.JPG Failed
> Extracting download/image/ex2.JPG Failed
> Extracting download/image/schema.PNG Failed
>
> Please use standard Linux file formats like .tar.gz instead of oddballs like .rar.
>
> Lee
>
>
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
sylvanino b wrote:
>Hi,
>
>I wrote a kernel tool for my personnal usage which goal is to keep a
>record of recent task preemptions and interruptions that appears under
>linux. Although the record is short (a few minutes only), It can help
>to analyse scheduling algorithm efficiency and also driver timing
>issues. The user can access data from user-space, through proc
>filesystem and analyze it with a graphics tool. Then, since it's also
>availlable within KDB, it can give clues and help for debugging.
>
>So far, the tool is not a big deal, but not trivial either. When It is
>running, the tool doesn't overload the system. And when it is not
>running, it's just transparent.
>
>I did a webpage for it, you can check it out at:
>http://membres.lycos.fr/kernelanalyzer/
>
>If you have any comment/critics, don't hesitate to share it
>Thanks,
>
>Sylvain
>-
>To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>the body of a message to [email protected]
>More majordomo info at http://vger.kernel.org/majordomo-info.html
>Please read the FAQ at http://www.tux.org/lkml/
>
>
>
Hi!
Lycos is not the right place for such a good project, request hosting at
sf.net or developer.berlios.de.
Matthias-Christian Ott
On Sat, 19 Feb 2005 02:33:00 +0100
sylvanino b <[email protected]> wrote:
> Hi,
>
> Sorry, it's meant to run on linux.
> Actually, patch provided is for linux 2.6.9 + kdb 4.4
>
>
> I have uploaded a new tarball and updated the webpage.
> should be ok,
>
> Sylvain
For some reason all i ever get to see is the front page.. Any link just
leads to an empty page like this [screenshot]:
http://affenbande.org/~tapas/kernelanalyzer_web.png
I second lee's idea to move the project to sf.net or berlios.
flo
--
Palimm Palimm!
http://affenbande.org/~tapas/
Florian Schmidt wrote:
> On Sat, 19 Feb 2005 02:33:00 +0100
> sylvanino b <[email protected]> wrote:
>
>
>>Hi,
>>
>>Sorry, it's meant to run on linux.
>>Actually, patch provided is for linux 2.6.9 + kdb 4.4
>>
>>
>>I have uploaded a new tarball and updated the webpage.
>>should be ok,
>>
>>Sylvain
>
>
> For some reason all i ever get to see is the front page.. Any link just
> leads to an empty page like this [screenshot]:
That's also what I saw with firefox, but konqueror worked OK.
> http://affenbande.org/~tapas/kernelanalyzer_web.png
>
> I second lee's idea to move the project to sf.net or berlios.
--
~Randy
On Sat, 2005-02-19 at 16:04 -0800, Randy.Dunlap wrote:
> >
> > For some reason all i ever get to see is the front page.. Any link just
> > leads to an empty page like this [screenshot]:
>
> That's also what I saw with firefox, but konqueror worked OK.
>
I saw it at first with Firefox but then when I tried again it worked.
> > http://affenbande.org/~tapas/kernelanalyzer_web.png
> >
> > I second lee's idea to move the project to sf.net or berlios.
>
This wasn't my idea but it's a good one.
Lee
hi,
sorry, the host had poor advertisement. I opened a SF project and am
waiting for its validation.
In the meantimes, I changed host, this one has no ad:
http://slvn.free.fr/kernelanalyzer/index.php
I'm going to put more explanation on the site too.
sylvain
On Sat, 19 Feb 2005 19:17:18 -0500, Lee Revell <[email protected]> wrote:
> On Sat, 2005-02-19 at 16:04 -0800, Randy.Dunlap wrote:
> > >
> > > For some reason all i ever get to see is the front page.. Any link just
> > > leads to an empty page like this [screenshot]:
> >
> > That's also what I saw with firefox, but konqueror worked OK.
> >
>
> I saw it at first with Firefox but then when I tried again it worked.
>
> > > http://affenbande.org/~tapas/kernelanalyzer_web.png
> > >
> > > I second lee's idea to move the project to sf.net or berlios.
> >
>
> This wasn't my idea but it's a good one.
>
> Lee
>
>
Hi,
I wrote a kernel tool for my personnal usage which goal is to keep a
record of recent task preemptions and interruptions that appears under
linux. Either for debugging through KDB, or for monitoring/analyze
with a graphics representation.
as adviced, SourceForge project is now opened:
http://sourceforge.net/projects/kernelanalyzer/
Best regards,
Sylvain
