[Darshan-users] Issues with Fio benchmark tool being profiled with Darshan
nrajesh at hawk.iit.edu
Tue Jul 14 15:15:42 CDT 2020
I am trying to profile an Fio command, where I do roughly a gigabyte of
reads or writes or mixed at a fixed block size.
fio --filename=./test --size=1024MB --direct=1 --rw=randrw --bs=4k
--ioengine=sync --iodepth=256 --numjobs=1 --name=test-job --minimal
I have tested it with the following 'ioengines':
I do get a darshan file, but all of the POSIX counters are 0, except for
POSIX_F_META_TIME, POSIX_STATS, POSIX_FILE_ALIGNMENT and POSIX_MMAPS. I
have ensured the operation is not simultaneously doing both POSIX and STDIO.
As per my configuration it should not be getting 0s especially for the
counters POSIX_SIZE_WRITE_1K_10K, POSIX_WRITES, POSIX_READS,
POSIX_BYTES_WRITTEN, POSIX_BYTES_READ etc.
Kindly advise what to do next.
Thank you for your time, Stay safe
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