[mvapich-discuss] (no subject)
Éric Germaneau
germaneau at sjtu.edu.cn
Thu Oct 8 23:30:46 EDT 2015
Hey Jonathan,
Yes, this is very helpful.
Thank you so munch.
On 10/09/2015 10:55 AM, Jonathan Perkins wrote:
> Hello Eric. The unit for latency is usec and MB/s for bandwidth.
> Each benchmark prints out the units during its run.
>
> Example:
> mpirun_rsh -export -hostfile /tmp/tmp.19T2ALyk7A -n 2 osu_bibw
> # OSU MPI Bi-Directional Bandwidth Test v5.0
> # Size Bandwidth (MB/s)
> 1 3.62
> 2 7.51
> 4 15.06
> 8 28.02
> 16 58.05
> 32 114.10
> 64 223.83
> 128 435.15
> 256 830.25
> 512 1452.15
> 1024 2330.16
> 2048 3023.21
> 4096 4057.69
> 8192 5861.25
> 16384 8495.77
> 32768 12379.71
> 65536 15407.75
> 131072 17126.77
> 262144 14844.16
> 524288 14759.74
> 1048576 14846.43
> 2097152 14196.25
> 4194304 5898.25
>
> For information on running the collective benchmarks with 2+ processes
> please take a look at the MVAPICH userguide:
> http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.2a-userguide.html#x1-930007.2.3
>
> and the OMB readme:
> http://mvapich.cse.ohio-state.edu/static/media/mvapich/mvapich2-2.2a-userguide.html#x1-930007.2.3
>
> I hope you find this helpful.
>
> On Thu, Oct 8, 2015 at 9:47 PM Éric Germaneau <germaneau at sjtu.edu.cn
> <mailto:germaneau at sjtu.edu.cn>> wrote:
>
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> Hey folks,
>
> I'm learning how to use the packages and wondering what's the unit of
> the latency in the following tools:
>
> * osu_latency
> * osu_bw
>
> and
>
> * osu_allgather
> * osu_allreduce
> * osu_bcast
> * osu_gather
> * osu_scatter
> * osu_iallgather
> * osu_ialltoall
> * osu_ibcast
> * osu_igather
> * osu_iscatter
>
> I think it's micro second but need confirmation.
> Also, I can not use more than two MPI process for the second bunch
> (collective).
> Is there a way to test many process?
> Thanks you.
>
> --
> Éric Germaneau (艾海克), Specialist
> Center for High Performance Computing
> Shanghai Jiao Tong University
> Room 205 Network Center, 800 Dongchuan Road, Shanghai 200240 China
> Email:germaneau at sjtu.edu.cn <mailto:Email%3Agermaneau at sjtu.edu.cn>
> Mobi:+86-136-4161-6480 http://hpc.sjtu.edu.cn
>
> *
> * English
> * Chinese (Simplified)
>
> * English
> * Chinese (Simplified)
>
> <javascript:void(0);>
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> Hey folks,<br>
> <br>
> I'm learning how to use the packages and wondering what's the unit
> of the latency in the following tools:<br>
> <ul>
> <li>osu_latency</li>
> <li>osu_bw</li>
> </ul>
> and<br>
> <ul>
> <li>osu_allgather<br>
> </li>
> <li>osu_allreduce<br>
> </li>
> <li>osu_bcast<br>
> </li>
> <li>osu_gather<br>
> </li>
> <li>osu_scatter<br>
> </li>
> <li>osu_iallgather<br>
> </li>
> <li>osu_ialltoall<br>
> </li>
> <li>osu_ibcast<br>
> </li>
> <li>osu_igather</li>
> <li>osu_iscatter<br>
> </li>
> </ul>
> I think it's micro second but need confirmation.<br>
> Also, I can not use more than two MPI process for the second bunch
> (collective).<br>
> Is there a way to test many process?<br>
> Thanks you.<br>
> <br>
> <div class="moz-signature">-- <br>
> <font color="#333399">
> Éric Germaneau (艾海克), Specialist<br>
> Center for High Performance Computing<br>
> Shanghai Jiao Tong University<br>
> Room 205 Network Center, 800 Dongchuan Road, Shanghai 200240
> China<br>
> <a class="moz-txt-link-abbreviated" href="mailto:Email
> <mailto:Email>:germaneau at sjtu.edu.cn
> <mailto:germaneau at sjtu.edu.cn>">Email:germaneau at sjtu.edu.cn
> <mailto:Email%3Agermaneau at sjtu.edu.cn></a> Mobi:+86-136-4161-6480
> <a class="moz-txt-link-freetext"
> href="http://hpc.sjtu.edu.cn">http://hpc.sjtu.edu.cn</a>
> </font>
> </div>
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--
Éric Germaneau (艾海克), Specialist
Center for High Performance Computing
Shanghai Jiao Tong University
Room 205 Network Center, 800 Dongchuan Road, Shanghai 200240 China
Email:germaneau at sjtu.edu.cn Mobi:+86-136-4161-6480 http://hpc.sjtu.edu.cn
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