[LITMUS^RT] How to Measure CPMD Costs

[Hiroyuki Chishiro]

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
>
>
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>



-- 

Hiroyuki Chishiro

Visiting Scholar

Department of Computer Science

The University of North Carolina at Chapel Hill
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