Hi Eric,
Eric W. Biederman wrote:
Yasuaki Ishimatsu <[EMAIL PROTECTED]> writes:
- define NR_IRQS as follow:
Vector domain can provide the number of irqs being proportional to the
number of CPUs theoretically. However, the relation between them is
actually not linear, especially in large system. To avoid the memory
consumption derived from too many irqs, I define NR_IRQS as follows:
#if (NR_VECTORS + 32 * NR_CPUS) < 1024
#define NR_IRQS (NR_VECTORS + 32 * NR_CPUS)
#else
#define NR_IRQS 1024
#endif
Below is my old patch to address this in a different way.
Basically this moves the per cpu counter of the number of
times an irq has happened on an individual cpu out of the
per cpu area. Honestly I think this might even have better
cache performance.
Sorry for my late reply.
I overviewed your patch and the patch looks good to me. It can improve
not only ia64 vector domain but also x86_64 vector domain. I'll consider
testing the patch after rebasing it, and if it'll be OK, including your
idea (or similar one) into my patchset.
BTW, I googled to find the discussion related to your patch, but can't find
it at all. Where did you submit it to?
Thanks,
Yasuaki Ishimatsu
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