* how to measure IRQ service latency
@ 2010-12-22 12:00 Pradeep Kumar
2010-12-22 12:28 ` neependra.khare at gmail.com
0 siblings, 1 reply; 6+ messages in thread
From: Pradeep Kumar @ 2010-12-22 12:00 UTC (permalink / raw)
To: kernelnewbies
hi,
can any one suggest a way to measure IRQ service latency? .
thanks
--
Goudagunta Pradeep Kumar,
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2010-12-22 12:00 how to measure IRQ service latency Pradeep Kumar
@ 2010-12-22 12:28 ` neependra.khare at gmail.com
2011-01-13 4:53 ` loody
0 siblings, 1 reply; 6+ messages in thread
From: neependra.khare at gmail.com @ 2010-12-22 12:28 UTC (permalink / raw)
To: kernelnewbies
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/
--
Regards,
Neependra
www.neependra.net
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* how to measure IRQ service latency
2010-12-22 12:28 ` neependra.khare at gmail.com
@ 2011-01-13 4:53 ` loody
2011-01-13 5:02 ` neependra.khare at gmail.com
0 siblings, 1 reply; 6+ messages in thread
From: loody @ 2011-01-13 4:53 UTC (permalink / raw)
To: kernelnewbies
hi:
2010/12/22 neependra.khare at 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.
is there any document which can tell us how to use it?
sincerely,
miloody
^ permalink raw reply [flat|nested] 6+ messages in thread
* how to measure IRQ service latency
2011-01-13 4:53 ` loody
@ 2011-01-13 5:02 ` neependra.khare at gmail.com
2011-01-13 5:19 ` loody
0 siblings, 1 reply; 6+ messages in thread
From: neependra.khare at gmail.com @ 2011-01-13 5:02 UTC (permalink / raw)
To: kernelnewbies
On Thu, Jan 13, 2011 at 10:23 AM, loody <miloody@gmail.com> wrote:
> hi:
>
> 2010/12/22 neependra.khare at 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
--
Regards,
Neependra
www.neependra.net
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* how to measure IRQ service latency
2011-01-13 5:02 ` neependra.khare at gmail.com
@ 2011-01-13 5:19 ` loody
2011-01-31 13:17 ` loody
0 siblings, 1 reply; 6+ messages in thread
From: loody @ 2011-01-13 5:19 UTC (permalink / raw)
To: kernelnewbies
Hi
2011/1/13 neependra.khare at 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 at 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
thanks for your help :)
Regards,
miloody
^ permalink raw reply [flat|nested] 6+ messages in thread
* how to measure IRQ service latency
2011-01-13 5:19 ` loody
@ 2011-01-31 13:17 ` loody
0 siblings, 0 replies; 6+ messages in thread
From: loody @ 2011-01-31 13:17 UTC (permalink / raw)
To: kernelnewbies
hi :
thanks for your help :)
2011/1/13 loody <miloody@gmail.com>:
> Hi
>
> 2011/1/13 neependra.khare at 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 at 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
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2010-12-22 12:00 how to measure IRQ service latency Pradeep Kumar
2010-12-22 12:28 ` neependra.khare at gmail.com
2011-01-13 4:53 ` loody
2011-01-13 5:02 ` neependra.khare at gmail.com
2011-01-13 5:19 ` loody
2011-01-31 13:17 ` loody
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