[lkml]   [2011]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] Add support for multiple MSI on x86
Roland Dreier wrote:
> > Yes, but there are MSI devices in the field...
> But do any of them benefit from having multiple interrupt vectors available?
> If I recall correct, willy was motivated by AHCI performance to try this out,
> and in the end things didn't go any faster using multiple MSI.
> The big win with multiple interrupt vectors is when you have independent
> queues that you can point different CPUs at, and give each CPU its own
> interrupt.

And this is how AHCI is designed, but libahci.c currently wraps its
interrupt handler in a device-wide lock. I don't know if that test also
reorganized the driver code.


 \ /
  Last update: 2011-03-10 16:35    [W:0.100 / U:6.276 seconds]
©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site