From: Matthew Wilcox <matthew@xxxxxx> Date: Fri, 11 Jul 2008 04:23:26 -0600 > On Fri, Jul 11, 2008 at 03:06:33AM -0700, Eric W. Biederman wrote: > > So unless the performance of the AHCI is better by a huge amount I don't > > see the point, and even then I am extremely sceptical. > > I don't have performance numbers yet, but surely you can see that > avoiding a register read in the interrupt path is a large win? Such overhead is going to be amortized. AHCI is not like networking where we have lots of very small transactions to deal with, and therefore the per-IRQ overhead can begin to dominate. Therefore, like Eric, I think workng on multiple MSI is a very dubious usage of one's time. But, it's your time, so use it how you wish :) -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
