hi :
thanks for your help :)

2011/1/13 loody [off-list ref]:

Hi

2011/1/13 neependra.khare at gmail.com [off-list ref]:

quoted

On Thu, Jan 13, 2011 at 10:23 AM, loody [off-list ref] wrote:

quoted

hi:

2010/12/22 neependra.khare at gmail.com [off-list ref]:

quoted

On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar [off-list ref]
wrote:

quoted

hi,
?? ?can any one suggest a way to measure IRQ service latency? .

I believe you can measure it with Ftrace. You might need to use irqsoff
tracer.
For reference:-
http://people.redhat.com/srostedt/

I go into the website and see a lot of files with suffix odp.

These are presentations which you can open with Open Office.
Those contain the examples as well.

quoted

is there any document which can tell us how to use it?

http://lwn.net/Articles/365835/
http://lwn.net/Articles/366796/
http://lwn.net/Articles/370423/

You can look at my presentation which I gave at FOSS.in?and see it is
useful.
http://neependra.net/?p=148

I have some questions about the document you mention:
1. I tried lttv recently and it seems different than the ftrace.
Is there any document or setting can help me to tell them apart?

2. there is a column called "TRACE" in kernel menuconfig, is it used
for ftrace or lttv?
appreciate your help,
miloody