On Thu, Apr 07, 2011 at 02:54:39PM -0700, Kristen Carlson Accardi wrote: > On Thu, 7 Apr 2011 13:35:02 -0700 > Greg KH <greg@xxxxxxxxx> wrote: > > > On Thu, Apr 07, 2011 at 09:56:54AM -0700, Kristen Carlson Accardi wrote: > > > > Have you made timing/performance studies, comparing (for example) USB > > > > disk throughput with and without threaded interrupts? > > > > > > > > > > I could never do this with all the different types of hw. I suggest > > > that if you decide to move to a threaded irq you have a long period of > > > testing time where people can determine whether or not it impacts > > > performance on their own hw. Just from googling I can see that tglx > > > did some performance analysis, but you'd have to ask him what the > > > findings were. > > > > I asked him about this an hour ago, and he found that he got a > > performance increase in USB throughput switching to threaded irqs, > > especially for usb-storage devices. > > > > So I'm all for it now, send me the patch and let's see what breaks :) > > > > thanks, > > > > greg k-h > > I sent him an email to see if he'll submit the patches he's been > testing with -- I figured it'd be better to use those since he's > got time on them already. Yes, it turns out that your patch will not work properly on some hardware in the first place, so his changes are needed. I see him working on them right now in front of me in the conference meeting we are currently sitting in... thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
