Use an MPI where you can control the buffering. Line of character
buffering would suffice in your case. Setting the line buffering in
the MPI process itself might not be sufficient, depending on how the
stdout/err is transported back to your (assumed) terminal.
Håkon
On Oct 26, 2009, at 16:35 , Daniel Kidger wrote:
Folks,
I have an benchmark code that uses printf on each MPI process to
print performance figures.
On the system that the original author's developed on, the output
from each process must have been line buffereed.
On the QDR IB system I have testing on, the printf from each process
is not line buffered and so the output is largely unreadable as all
the lines have been jumbled together.
Is this a known issue with a workaround? or does everyone else only
print from just one MPI process?
Daniel
--
Bull, Architect of an Open World TM
Dr. Daniel Kidger, HPC Technical Consultant
daniel.kid...@bull.co.uk
+44 (0) 7966822177
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Mvh.,
Håkon Bugge
h-bu...@online.no
+47 924 84 514
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