lkml.org 
[lkml]   [2002]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subjectinterrupt latency
Date
Hello,

I am running and will in near future kernel 2.4.18 on an embedded system.

I have to speed up interrupt latency and need to understand how in what
timing tasklets are called and arbitraded.

I have to dig deep, but the kernel tree is quiet huge. As a non kernel
programmer I ask you, if anyone could give me a hint, where to start reading
from and which kernel source to pick first.

Any help highly appreaciated.
(BTW: I will not bother you personaly with further questions unless you give
permission.)


What's behind it: We patched NMI and do some stuff we have to do very
regularly in there. After NMI we have to quiet fast start a kernel or even a
user space function with low latency. Also I measured 8 milliseconds after a
hardware interrupt before the corresponding interrupt function is called. At
RTI time it is even longer (around 12 microseconds). Need to find a way to
exactly understand why, and maybe speed up a bit.

Thank You.
Siegfried.


-------------
HBM - Hottinger Baldwin Messtechnik GmbH
Siegfried Wessler, Dipl.-Ing.
Entwicklung Messverstärker T-V
Im Tiefen See 45, D-64293 Darmstadt
Fon: 06151/803-884, Fax: -524
eMail: siegfried.wessler@hbm.com

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

\
 
 \ /
  Last update: 2005-03-22 13:28    [W:0.198 / U:0.492 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site