[EMAIL PROTECTED] wrote:
Hi,
In MSI-HOWTO, it's said:
"Using MSI enables the device functions to support two or more vectors, which can be
configured to target different CPUs to increase scalability."
So how can I set up MSI-X vectors to target different CPUs? I want to allocate
the same number of MSI-X vectors as CPUs, and equally distribute them to every
CPU.
Is it automatically done by Linux when I call pci_enable_msix()? If yes, how?
If not, what should I do? My guess is to set the affinity of the interrupts
manually. Am I right?
Please CC'ed me ([EMAIL PROTECTED]) answers/comments in response to this posting.
Thanks,
Ying
If the device actually supports multiple vectors (not all do), I think
they should show up as separate interrupts in /proc/interrupts and you
can either set the affinity manually, or maybe irqbalance is smart
enough for this.
Careful, though, as in some cases this may reduce performance due to
causing more cache line bouncing between CPUs.
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