Jan. 31, 2011
1:17 p.m.
hi : thanks for your help :) 2011/1/13 loody <miloody@gmail.com>: > Hi > > 2011/1/13 neependra.khare@gmail.com <neependra.khare@gmail.com>: >> >> >> On Thu, Jan 13, 2011 at 10:23 AM, loody <miloody@gmail.com> wrote: >>> >>> hi: >>> >>> 2010/12/22 neependra.khare@gmail.com <neependra.khare@gmail.com>: >>> > >>> > >>> > On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar <pradeepkernel@gmail.com> >>> > wrote: >>> >> >>> >> 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. >> >>> >>> 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