[Darshan-users] Computation and I/O Modelling

[Carns, Philip H.]

Hi Ruchi,

Unfortunately Darshan doesn't directly capture computation effort.  The only thing it can really tell you is how much time was spent *not* doing I/O.  You could assume that is computation time, but really it could include communication, synchronization, or any other non-I/O tasks that Darshan might be doing.

The module infrastructure in Darshan now would be a possible vehicle to add a mechanism for tracking compute effort, but that hasn't been done (and wouldn't apply to previously collected logs anyway).

thanks,
-Phil
________________________________
From: Darshan-users <darshan-users-bounces at lists.mcs.anl.gov> on behalf of Ruchi Pandey via Darshan-users <darshan-users at lists.mcs.anl.gov>
Sent: Friday, July 12, 2019 5:47 AM
To: darshan-users at lists.mcs.anl.gov
Subject: [Darshan-users] Computation and I/O Modelling

Hello,

I am student at TU Darmstadt,Germany and currently doing my master thesis.
For the same I am trying to derive a statistical model from the data from Darshan published in the The ALCF I/O Data Repository.
Could someone point me as to how to extract the computation effort from the darshan-parser output from the above logs?

Best
Ruchi

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