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Re: [Starpu-devel] Starpu stats about disk, OOC, and swapping


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  • From: Samuel Thibault <samuel.thibault@inria.fr>
  • To: Amani Alonazi <amani.alonazi@kaust.edu.sa>
  • Cc: "starpu-devel@lists.gforge.inria.fr" <starpu-devel@lists.gforge.inria.fr>, Hatem Ltaief <Hatem.Ltaief@kaust.edu.sa>
  • Subject: Re: [Starpu-devel] Starpu stats about disk, OOC, and swapping
  • Date: Mon, 14 Jan 2019 18:41:25 +0100
  • List-archive: <http://lists.gforge.inria.fr/pipermail/starpu-devel/>
  • List-id: "Developers list. For discussion of new features, code changes, etc." <starpu-devel.lists.gforge.inria.fr>
  • Organization: I am not organized
Amani Alonazi, le lun. 14 janv. 2019 20:36:41 +0300, a ecrit:
> I did a benchmark of my node I/O bandwidth and it's 90 MB/s and also
> confirmed
> by StarPU benchmark at the beginning of the execution. Am I missing
> something?

For a spinning disk that would be not too surprising. Since your latency
is 30ms-ish, it looks like a spinning disk.

You could compare with the standard hdparm benchmark:

sudo hdparm -t /dev/sda

(replace sda with however your disk is called)

On one of our servers I'm getting 80MB/s. On my laptop with an nvme disk
I get a whopping 4500MB/s, it really depends on the hardware :)

Samuel


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