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[Starpu-devel] Task start and end time in SPMD-mode


Chronologique Discussions 
  • From: Mirko Myllykoski <mirkom@cs.umu.se>
  • To: Starpu Devel <starpu-devel@lists.gforge.inria.fr>
  • Cc: Mahmoud Eljammaly <mjammaly@cs.umu.se>
  • Subject: [Starpu-devel] Task start and end time in SPMD-mode
  • Date: Thu, 23 Aug 2018 16:29:17 +0200
  • Authentication-results: mail2-smtp-roc.national.inria.fr; spf=None smtp.pra=mirkom@cs.umu.se; spf=Pass smtp.mailfrom=mirkom@cs.umu.se; spf=None smtp.helo=postmaster@mail.cs.umu.se
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Hi,

I would like to know how StarPU records task start and end times (starpu_profiling_task_info::start_time and starpu_profiling_task_info::end_time) in SPMD-mode.

It appears that each worker records the task start and end times separately on lines src/drivers/cpu/driver_cpu.c:93 and src/drivers/cpu/driver_cpu.c:122, respectively. Rank 0 later stores it's own timing information to the job-structure on line src/drivers/cpu/driver_cpu.c:155. My conclusion is that only the rank 0 gets recorded. Is this correct?

All line number are from StarPU 1.2.4.

Best Regards,
Mirko Myllykoski




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