Hi Nizam,
Could you elaborate on what is changing between the runs?
The simulator is deterministic, so if everything stays the same you will get
exactly the same output (otherwise we would never be able to run any
regressions the way we do).
Andreas
From: Nizamudheen Ahmed via gem5-users
<gem5-users@gem5.org<mailto:gem5-users@gem5.org>>
Reply-To: Nizamudheen Ahmed
<nizam.ah...@gmail.com<mailto:nizam.ah...@gmail.com>>, gem5 users mailing list
<gem5-users@gem5.org<mailto:gem5-users@gem5.org>>
Date: Wednesday, 10 September 2014 16:50
To: gem5 users mailing list <gem5-users@gem5.org<mailto:gem5-users@gem5.org>>
Subject: [gem5-users] non-determinism in GEM5 stats
Hi champs,
I observe the stats.txt contain alarmingly different data across multiple run
of the same benchmark under same target configuration. For example, i get 17%
miss-rate and 5% miss-rate across two different runs.
Can you help me identifying what could be going wrong?
I have checkpointed the Linux boot and i am attempting to run PARSEC benchmark
(blackscholes to be precise) ARM ISA. I also use m5::reset_stats and
m5::dump_and_reset_stats around the ROI (i instrumented the hook.c in the
PARSEC to invoke these calls).
Thanks.
Best regards,
Nizam
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