On Mon, Feb 24, 2014 at 10:58 PM, Christopher Samuel <[email protected]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 21/02/14 09:23, Kevin Van Workum wrote: > >> Does anyone have a real-world application where setting >> intel_idle.max_cstate=0 and processor.max_cstate=0 actually makes a >> difference wrt application or network latency? > > Mellanox's recommendation is: > > intel_idle.max_cstate=0 processor.max_cstate=1 > > That's from: > > http://www.mellanox.com/related-docs/prod_software/Performance_Tuning_Guide_for_Mellanox_Network_Adapters.pdf > > We certainly saw performance problems with RHEL6 on Sandybridge systems > without that. >
Yes, this is the recommendation I'm wondering about. Can you describe in more detail the performance problems you saw? Any particular application? Measurables? -- _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
