Re: how to measure IRQ service latency
hi : thanks for your help :) 2011/1/13 loody : > Hi > > 2011/1/13 neependra.kh...@gmail.com : >> >> >> On Thu, Jan 13, 2011 at 10:23 AM, loody wrote: >>> >>> hi: >>> >>> 2010/12/22 neependra.kh...@gmail.com : >>> > >>> > >>> > On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar >>> > 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 ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: how to measure IRQ service latency
Hi 2011/1/13 neependra.kh...@gmail.com : > > > On Thu, Jan 13, 2011 at 10:23 AM, loody wrote: >> >> hi: >> >> 2010/12/22 neependra.kh...@gmail.com : >> > >> > >> > On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar >> > 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 thanks for your help :) Regards, miloody ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: how to measure IRQ service latency
On Thu, Jan 13, 2011 at 10:23 AM, loody wrote: > hi: > > 2010/12/22 neependra.kh...@gmail.com : > > > > > > On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar > > 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 -- Regards, Neependra www.neependra.net ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: how to measure IRQ service latency
hi: 2010/12/22 neependra.kh...@gmail.com : > > > On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar > 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. is there any document which can tell us how to use it? sincerely, miloody ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
Re: how to measure IRQ service latency
On Wed, Dec 22, 2010 at 5:30 PM, Pradeep Kumar 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/ -- Regards, Neependra www.neependra.net ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
how to measure IRQ service latency
hi, can any one suggest a way to measure IRQ service latency? . thanks -- Goudagunta Pradeep Kumar, ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
