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

[Amani Alonazi <amani.alonazi@kaust.edu.sa>]

Indeed. But, StarPU statistics reports more than 90 MB/s, which is the sustained BW.

On Mon, Jan 14, 2019 at 8:41 PM Samuel Thibault <samuel.thibault@inria.fr> wrote:

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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