Hi Carmelo,
On 04/21/15 11:40, Carmelo Ponti (CSCS) wrote:
checking the load with top I can see a lot of processes called
migration/[0-31] which are loading the servers:
You could try to increase the value of kernel.sched_migration_cost on
your robinhood server (x 10 would be a good start). This tuning seems
recommended on a server with a lot of running threads:
$ sysctl -w kernel.sched_migration_cost=5000000
You could also play with tools like numactl to see if cpu pinning helps...
Let us know if that helps,
Stephane
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