Prarit Bhargava wrote:
Tony,
Might it be wise to see whether the 2% variation that I saw can be
repeated on some other architecture? Can someone else try
this patch and post the before/after values for migration_cost from
dmesg?
Whoops. Let's try that again:
Pristine (with build_sched_domains measurement):
[ 9.942253] Brought up 64 CPUs
[ 9.942904] Total of 64 processors activated (143654.91 BogoMIPS).
[ 9.943995] build_sched_domains: start
[ 32.108439] migration_cost=0,32232,39021
[ 37.894391] build_sched_domains: end
Patched (with build_sched_domains measurement):
[ 9.942267] Brought up 64 CPUs
[ 9.942930] Total of 64 processors activated (143654.91 BogoMIPS).
[ 9.944032] build_sched_domains: beginmigration_cost=0,31854,38739
[ 23.868304] build_sched_domains: end
P.
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