Messages in this thread | | | Date | Fri, 28 May 2004 15:58:35 -0400 | From | Jeff Garzik <> | Subject | Re: CONFIG_IRQBALANCE for AMD64? |
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Nivedita Singhvi wrote: > I see networking interrupts requiring fine granularity > balancing, to avoid the potential for dropped packets and > long latencies. That is, given a busy server that is > seeing a lot of interrupts, fair distribution of the > interrupts is required within a very small amount of time, > and we cannot require a user space daemon that parses the /proc > file system and applies a policy and then rebinds irqs > to different CPUs to run with that frequency.
Network is one of the areas where you _don't_ want to be constantly pointing your NIC's irq to different CPUs.
Cache affinity, packet re-ordering problems, and other fun ensue.
Jeff
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