lkml.org 
[lkml]   [1999]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectlatency-profiling (Was: Re: Linux 2.2.14pre6)
Hi,

I developed a instrumentation patch to catch code that run in kernel
for a long time (> 5 ms). It is really written for 2.2.13
but it should be easily adaptable to any kernel.

More info at:
http://www.norran.net/nra02596/

It needs another higher priority thread wanting to run
you can use Bennos latency test.

http://www.gardena.net/benno/linux/audio/
[current at http://www.gardena.net/benno/linux/latencytest-0.42.tar.gz ]

/RogerL

Rogier Wolff wrote:
>
> Alan Cox wrote:
> > > For some reason I get serial overrun errors with 2.2.14pre6:
>
> > Does backing out the mdelay(1) added to the pc keyboard driver fix
> > this. If so I'll pull that change until someone has time to redo it
> > to avoid irq problems
>
> The 2.2 IDE driver disables interrupts for up to around 20ms. I
> suspect that this depends on the drive. i.e. it sometimes waits inside
> the IRQ for the drive to do its thing instead of waiting for the next
> interrupt. This is probably a problem in the drive, that we simply
> used to handle a lot better before....
>
> Roger.
>
> --
> ** R.E.Wolff@BitWizard.nl ** http://www.BitWizard.nl/ ** +31-15-2137555 **
> *-- BitWizard writes Linux device drivers for any device you may have! --*
> "I didn't say it was your fault. I said I was going to blame it on you."
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.rutgers.edu
> Please read the FAQ at http://www.tux.org/lkml/

--

The Internet interprets Windows as damage,
and routes around it.

Roger Larsson
Skellefteå
Sweden

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

\
 
 \ /
  Last update: 2005-03-22 13:55    [W:0.259 / U:0.012 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site