On Fri, Mar 07, 2008 at 12:53:52AM -0500, Brock Palen wrote: > If our IO servers are seeing extended periods of socknal_sd00 at 100% > cpu, Would this cause a bottle neck? If so its a single homed > hosts, would adding another interface to the host help?
To quote the Lustre Manual: enable_irq_affinity (1,Wc) is a boolean that determines whether to enable IRQ affinity. When set, socklnd attempts to maximize performance by handling device interrupts and data movement for particular (hardware) interfaces on particular CPUs. This option is not available on all platforms. This option requires an SMP system to exist and produces best performance with multiple NICs. Systems with multiple CPUs and a single NIC may see increase in the performance with this parameter disabled. So if you have multiple CPUs and a single NIC (or more precisely Lustre only uses a single NIC) I'd suggest to try: options ksocklnd enable_irq_affinity=0 Isaac _______________________________________________ Lustre-discuss mailing list [email protected] http://lists.lustre.org/mailman/listinfo/lustre-discuss
