Date: Fri, 9 Jan 2015 23:37:25 +0000 From: Daniel Kolesa <quaker66@gmail.com> To: Adrian Chadd <adrian@freebsd.org>, freebsd-usb@freebsd.org Subject: Re: Lynx Point USB - large amount of interrupts (300k / second) Message-ID: <CANVWg0gi0MgLR6iLhDU4oSBrt0bWkrfsOhC5R%2Bh_gveJruL86w@mail.gmail.com>
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2015-01-09 23:26 GMT+00:00 Daniel Kolesa <quaker66@gmail.com>: > 2015-01-09 20:24 GMT+00:00 Adrian Chadd <adrian@freebsd.org>: >> hi, >> >> I have a haswell desktop box at home: >> >> CPU: Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz (3192.67-MHz K8-class CPU) >> >> With lynx point USB: > > Also Haswell here, but with H97 chipset, which means Wildcat Point > USB. Not getting the issue. > >> >> adrian@test-2:~ % dmesg | grep ehci >> ehci0: <Intel Lynx Point USB 2.0 controller USB-B> mem >> 0xf7f1c000-0xf7f1c3ff irq 16 at device 26.0 on pci0 >> usbus1 on ehci0 >> ehci1: <Intel Lynx Point USB 2.0 controller USB-A> mem >> 0xf7f1b000-0xf7f1b3ff irq 23 at device 29.0 on pci0 >> usbus2 on ehci1 >> >> >> ehci0@pci0:0:26:0: class=0x0c0320 card=0x367d17aa chip=0x8c2d8086 >> rev=0x05 hdr=0x00 >> vendor = 'Intel Corporation' >> device = 'Lynx Point USB Enhanced Host Controller' >> class = serial bus >> subclass = USB >> >> ehci1@pci0:0:29:0: class=0x0c0320 card=0x367d17aa chip=0x8c268086 >> rev=0x05 hdr=0x00 >> vendor = 'Intel Corporation' >> device = 'Lynx Point USB Enhanced Host Controller' >> class = serial bus >> subclass = USB >> >> >> and: >> >> xhci0: <Intel Lynx Point USB 3.0 controller> mem 0xf7f00000-0xf7f0ffff >> irq 16 at device 20.0 on pci0 >> xhci0: 32 byte context size. >> xhci0: Port routing mask set to 0xffffffff >> usbus0 on xhci0 >> >> xhci0@pci0:0:20:0: class=0x0c0330 card=0x367d17aa chip=0x8c318086 >> rev=0x05 hdr=0x00 >> vendor = 'Intel Corporation' >> device = 'Lynx Point USB xHCI Host Controller' >> class = serial bus >> subclass = USB >> >> .. now, whta I'm seeing is this: >> >> irq16: ehci0 21441217509 25285 >> stray irq16 0 0 >> >> ... systat -vmstat 1 shows the interrupt rate to be ridiculous though, >> like 230,000 interrupts a second. > > The numbers it shows here are very small. > >> >> Proc: Interrupts >> r p d s w Csw Trp Sys Int Sof Flt ioflt 256k total >> 45 6 510k 11 245 255k 16 3 cow 255k ehci0 16 >> 1 zfod ehci1 23 >> >> .. so, what gives? :) Has anyone else seen this? >> >> >> >> -adrian >> _______________________________________________ >> freebsd-usb@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-usb >> To unsubscribe, send any mail to "freebsd-usb-unsubscribe@freebsd.org" > > Daniel Oops. Accidentally sent only to Adrian rather than the list. Sorry
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