[Darshan-users] Darshan & EPCC benchio different behaviour

[Piero LANUCARA]

yes...correct

Piero

Il 07/02/2020 16:07, Harms, Kevin ha scritto:
> Piero,
>
>    just to confirm, the serial case is still running in parallel, 36 processes, but the I/O is only from rank 0?
>
> kevin
>
> ________________________________________
> From: Darshan-users <darshan-users-bounces at lists.mcs.anl.gov> on behalf of Piero LANUCARA <p.lanucara at cineca.it>
> Sent: Wednesday, February 5, 2020 4:56 AM
> To: darshan-users at lists.mcs.anl.gov
> Subject: Re: [Darshan-users] Darshan & EPCC benchio different behaviour
>
> p.s
>
> to be more "verbose" I add to the discussion:
>
> Darshan output for the "serial" run (serial.pdf)
>
> Darshan output for the MPI-IO run (mpiio.pdf)
>
> benchio output for "serial" run (serial.out)
>
> benchio output for "MPI-IO" run (mpi-io.out)
>
> thanks
>
> Piero
>
> Il 04/02/2020 19:44, Piero LANUCARA ha scritto:
>> Dear all
>>
>> I'm using Darshan to measure EPCC benchio benchmark
>> (https://github.com/EPCCed/benchio) behaviour on a given x86 Tier1
>> machine.
>>
>> running two benchio tests (MPI-IO and serial) a different behaviour
>> appear
>>
>> while Darhsan pdf log file is able to recover the estimated time and
>> bandwidth in the MPI-IO case, the "serial" run is completely
>> underestimated by Darshan (the time and bandwidth are less/greater
>> than benchio output).
>>
>> Suggestions are welcomed
>>
>> thanks
>>
>> Piero
>>
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