On Sun, Jun 15, 2008 at 04:26:24AM +0400, Mikhail Kuzminsky wrote: > We have many jobs in SGE at every time moment, and underload situation > (where it's reasonable to decrease CPUs frequency) is not the our > danger :-) So I'm thinking about simple stopping of all the > corresponding daemons.
Hi Mikhail, There's not much point to running a powersave daemon. Even if a job is not CPU bound you'll find that lower power states will probably have a negative effect on your interconnect performance too. I don't run a daemon but I use the Torque prologue and epilogue to set the max and min power states using the /proc cpufreq interface before and after jobs. This results in a power saving when a queued jobs are waiting for additional nodes to free up. It's a measurably large difference when the system is being drained prior to a downtime. Our nodes are never shared beteen jobs making this easy to implement. Regards, -- Eoin McHugh ICHEC Systems _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
