[petsc-dev] [Ideas-team] Seeking OLCF users complaining about poor build times

Jed Brown jed at jedbrown.org
Fri Feb 27 12:00:39 CST 2015

Barry Smith <bsmith at mcs.anl.gov> writes:
>    Actually the parallel compiles of the 1000+ files on the "regular"
>    filesystems at ANL and LBL is taking less than 2 minutes so I can't
>    blame the filesystem bandwidth.

I think bandwidth is adequate, but latency (especially for metadata) is
rather high.  Normal make uses parallelism to mitigate, but configure is
sequential, so gets hit harder.
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