[LITMUS^RT] How to Measure CPMD Costs

[Jonathan Herman]

My code did not measure normal CPMD costs unfortunately. The cache coloring
paper pre-loaded all data needed by a job into the cache before the job
began execution. This was recorded by the scheduler and saved in the load
field of a job_completion record, where it was parsed by my scripts.


On Wed, Aug 7, 2013 at 8:13 AM, Hiroyuki Chishiro <chishiro at cs.unc.edu>wrote:

>
> Hi Björn,
>
> Thank you for your reply.
> I could measure CPMD costs using the synthetic method.
>
>
>
> On Tue, Aug 6, 2013 at 3:00 AM, Björn Brandenburg <bbb at mpi-sws.org> wrote:
>
>>
>> On Aug 5, 2013, at 9:21 PM, Hiroyuki Chishiro <chishiro at cs.unc.edu>
>> wrote:
>> >
>> > I would like to know how to measure CPMD costs.
>> >
>> > I could not compile cpmd-experiments in
>> https://github.com/brandenburg/cpmd-experiments.
>> > Because the following compile errors occur.
>> >
>> > --
>> > bin/pm_task.c:121:29: error: 'struct control_page' has no member named
>> 'job_count'
>> > bin/pm_task.c:128:25: error: 'struct control_page' has no member named
>> 'job_count'
>> > bin/pm_task.c:129:27: error: 'struct control_page' has no member named
>> 'sched_count'
>> > bin/pm_task.c:130:19: error: 'struct control_page' has no member named
>> 'cpu'
>> > bin/pm_task.c:131:28: error: 'struct control_page' has no member named
>> 'last_rt_task'
>> > bin/pm_task.c:154:30: error: 'struct control_page' has no member named
>> 'job_count'
>> > bin/pm_task.c:155:30: error: 'struct control_page' has no member named
>> 'sched_count'
>> > bin/pm_task.c:156:22: error: 'struct control_page' has no member named
>> 'cpu'
>> > bin/pm_task.c:188:31: error: 'struct control_page' has no member named
>> 'job_count'
>> > bin/pm_task.c:189:32: error: 'struct control_page' has no member named
>> 'sched_count'
>> > bin/pm_task.c:190:24: error: 'struct control_page' has no member named
>> 'cpu'
>> > bin/pm_task.c:222:32: error: 'struct control_page' has no member named
>> 'sched_count'
>> > bin/pm_task.c:223:24: error: 'struct control_page' has no member named
>> 'cpu'
>> > bin/pm_task.c:234:9: error: 'struct control_page' has no member named
>> 'preempt_end'
>> > bin/pm_task.c:234:29: error: 'struct control_page' has no member named
>> 'preempt_start'
>> > bin/pm_task.c:235:25: error: 'struct control_page' has no member named
>> 'job_count'
>> > bin/pm_task.c:236:27: error: 'struct control_page' has no member named
>> 'sched_count'
>> > bin/pm_task.c:237:19: error: 'struct control_page' has no member named
>> 'cpu'
>> > bin/pm_task.c:238:28: error: 'struct control_page' has no member named
>> 'last_rt_task'
>> > bin/pm_task.c:253:51: error: 'struct control_page' has no member named
>> 'job_count'
>> > bin/pm_task.c:254:53: error: 'struct control_page' has no member named
>> 'sched_count'
>> > bin/pm_task.c:255:45: error: 'struct control_page' has no member named
>> 'cpu'
>> > --
>> >
>> > I think that struct control_page does not have these members in current
>> LITMUS^RT.
>> > Please tell me how to measure CPMD costs in current LITMUS^RT.
>>
>> In short: run the make file, not the SCons script.
>>
>> Longer explanation: we developed two CPMD measurement approaches, the
>> synthetic method and the schedule-sensitive method. The former uses
>> SCHED_FIFO and a special measurement task and also works under stock Linux;
>> the latter requires kernel modifications and worked with an old branch of
>> LITMUS^RT. You are seeing compile errors in the schedule-sensitive method,
>> which has never been supported in the mainline LITMUS^RT version. Just use
>> the synthetic method, which is easier to use and produces results faster
>> anyway.
>>
>> (I thought Jonathan's scripts actually do that for you automatically.)
>>
>> - Björn
>>
>>
>> _______________________________________________
>> litmus-dev mailing list
>> litmus-dev at lists.litmus-rt.org
>> https://lists.litmus-rt.org/listinfo/litmus-dev
>>
>
>
>
> --
>
> Hiroyuki Chishiro
>
> Visiting Scholar
>
> Department of Computer Science
>
> The University of North Carolina at Chapel Hill
>
> _______________________________________________
> litmus-dev mailing list
> litmus-dev at lists.litmus-rt.org
> https://lists.litmus-rt.org/listinfo/litmus-dev
>
>


-- 
Jonathan Herman
Department of Computer Science at UNC Chapel Hill
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