[Darshan-users] Darshan I/O profiling of sequential code

[Shane Snyder]

Hi Wadud,

Right now, Darshan can only instrument MPI applications. It intercepts 
MPI_Init and MPI_Finalize to initialize itself and to produce the output 
log file, respectively. It also uses MPI communication and I/O 
operations at shutdown time to aggregate data across all processes and 
write to the log file. Breaking the MPI dependencies isn't exactly 
straightforward, but we have at least been thinking about how to extend 
Darshan to non-MPI codes. Recent changes to the architecture have been a 
step in the right direction but there's still work to do to get us all 
the way there.

We will continue to think about this and will certainly keep the mailing 
list updated with any progress we make.

Thanks,
--Shane

On 12/14/2016 09:35 AM, Wadud Miah wrote:
>
> Hello,
>
> I have built Darshan using Intel MPI (2017) and would like to profile 
> a sequential code using Darshan. I have used the same Darshan library 
> to profile an MPI code it works fine. I execute the following command 
> line for a sequential code :
>
> $ export DARSHAN_LOGPATH=.
>
> $ 
> LD_PRELOAD=/home/pr1ebt00/pr1ebt05/darshan-3.1.2-impi/lib/libdarshan.so 
> ~/gbmoldd/utilities/joinfiles.exe
>
> but it doesn’t create any Darshan output file. Do you know if I can 
> profile sequential codes using Darshan? If so, how can I do this?
>
> Best regards,
>
> Wadud.
>
> -----------------------------------
>
> Dr. Wadud Miah
>
> Computational Scientist
>
> Numerical Algorithms Group
>
> 01865 518035
>
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