Date: Thu, 11 Jun 2015 12:00:14 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Ian Smith <smithi@nimnet.asn.au> Cc: Yanhui Shen <shen.elf@gmail.com>, FreeBSD Stable Mailing List <freebsd-stable@freebsd.org> Subject: Re: High Interrupt rate since r279961 on STABLE/10 branch Message-ID: <CAJ-Vmo=bPXWxjteG4Si7OmvXvrDCwDxZN4z-UYrB7HyTf_nyGQ@mail.gmail.com> In-Reply-To: <20150611160835.K74737@sola.nimnet.asn.au> References: <CAEEM4vmsVQDiRoiiknz=4hH5b6Pyq94faC6FeAR%2B1WxyapGc-w@mail.gmail.com> <CAJ-Vmo=%2B%2BSJpvbSP6PJhS0LCj6kbcdJa=Do_4yO-sUDe_B8tww@mail.gmail.com> <CAEEM4v=j=4U5p1jfkjFTYee8kwF1j0DDRgkXj624936_5qLADw@mail.gmail.com> <20150611160835.K74737@sola.nimnet.asn.au>
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because they're shared. It just doesn't show up by default as nothing has really claimed the IRQ. try vmstat -ia .. -adrian On 10 June 2015 at 23:19, Ian Smith <smithi@nimnet.asn.au> wrote: > On Thu, 11 Jun 2015 09:43:15 +0800, Yanhui Shen wrote: > > Hi, > > > > Thanks, it works! > > > > https://svnweb.freebsd.org/base/head/sys/dev/pci/vga_pci.c?r1=284012&r2=284011&pathrev=284012 > > > > > > > > 2015-06-11 0:38 GMT+08:00 Adrian Chadd <adrian@freebsd.org>: > > > > > Hi, > > > > > > There was an update to freebsd-head a few days ago from hans - it > > > disabled PCI interrupts for VGA until a driver claims it. > > > > > > See if that helps? > > I'm glad it does, and can see the interrupt rate on vgapci0 was 173 when > bad and 4 when good, but I'm completely at a loss to see how that might > have affected the interrupt rate on uhci3, shown below as 189643 (!) > when bad and, er, absent when good? > > cheers, Ian > > > > > Device: ThinkPad R400 (Product ID: 278225C) > > > > CPU: Intel Core 2 Duo processor T6570 (2.1 GHz) > > > > GPU: Intel Integrated Graphics 4500MHD > > > > > > > > Output of "vmstat -i" with r284205 kernel (abnormal): > > > > interrupt total rate > > > > irq1: atkbd0 1607 1 > > > > irq9: acpi0 131958 104 > > > > irq12: psm0 4281 3 > > > > irq16: uhci3 239899376 189643 > > > > irq20: hpet0 uhci0 1426118 1127 > > > > irq21: uhci1 40315 31 > > > > irq23: ehci0 33 0 > > > > irq256: vgapci0 6059 4 > > > > irq257: em0 49220 38 > > > > irq258: hdac0 62 0 > > > > irq260: ahci0:ch0 17217 13 > > > > irq261: ahci0:ch1 23 0 > > > > Total 241576269 190969 > > > > > > > > Output of "vmstat -i" with r279958 kernel (normal): > > > > interrupt total rate > > > > irq1: atkbd0 48155 3 > > > > irq9: acpi0 1581468 105 > > > > irq12: psm0 209484 13 > > > > irq19: ehci1 48099 3 > > > > irq20: hpet0 uhci0 17385585 1156 > > > > irq21: uhci1 680884 45 > > > > irq23: ehci0 31 0 > > > > irq256: vgapci0 2611430 173 > > > > irq257: em0 1342009 89 > > > > irq258: hdac0 602220 40 > > > > irq260: ahci0:ch0 236313 15 > > > > irq261: ahci0:ch1 27 0 > > > > Total 24745705 1646
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