Date: Wed, 2 May 2018 09:22:25 +0200 From: Hans Petter Selasky <hps@selasky.org> To: Eitan Adler <lists@eitanadler.com>, usb@freebsd.org Subject: Re: IRQ storm on xhci0 Message-ID: <a2cadeb3-973a-cca6-3909-eedfc948c120@selasky.org> In-Reply-To: <CAF6rxgmdAVEvwC0cgaXE_Oz1Z84TjMPfKJ3MYPYm5KQbKH7E=Q@mail.gmail.com> References: <CAF6rxgk4u%2B2SrrOO18ceAJOWp1wMdGxAHfGVE40Y0t-=bzJFnQ@mail.gmail.com> <CAF6rxgmdAVEvwC0cgaXE_Oz1Z84TjMPfKJ3MYPYm5KQbKH7E=Q@mail.gmail.com>
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On 05/02/18 06:22, Eitan Adler wrote: > On 1 May 2018 at 20:53, Eitan Adler <lists@eitanadler.com> wrote: >> Hi all, >> >> I am noticing consistently high IRQ rates on xhci0 >> >> example from vmstat -i right now: >> irq259: xhci0 2222153 1876 >> >> and this is not the highest I've seen. >> >> My understanding is that a rate of 1876/s is insane for USB devices. >> Any suggestions of what I can do to debug? >> >> Things I've tried: >> - disabling MSI interrupts >> - disabling MSI-X interrupts >> - powering off all usb devices using usbconfig >> - unplugging all USB devices >> >> One thing of note: >> My mobo has a broken USB connector resulting in one of the two front >> USB-3 ports not working. I'm guessing this is related but I'd like >> some confirmation and/or a way to bypass the issue in software. > > with insane debugging enabled: > Try to see with usbdump if any traffic is passing on xhci0. --HPS
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