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Re: PCI-MSI-edge in /proc/interrupts

On Mon, 08 Aug 2011, Camaleón wrote:
> On Mon, 08 Aug 2011 17:57:49 +0900, J.Hwan Kim wrote:
> > When I read /proc/interrupts, it displays interrupt type of my ethernet
> > card with "PCI-MSI-edge".
> Mmm, I get two modes for each of my ethernet devices:
> sm01@stt008:~$ grep -i eth /proc/interrupts
>  20:          1          0          0          0   IO-APIC-fasteoi   eth1
> 1276:     104018     104203     104044     103894   PCI-MSI-edge      eth0
> I wonder what's the difference between those two :-?

Basically, MSI and MSI-X scale a lot better and are faster to process.

They're device-specific (and often device-function-specific), so they're
never shared with other devices.

  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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