Date: Thu, 9 Oct 2008 23:49:54 +0200 From: Erik Trulsson <ertr1013@student.uu.se> To: Zahemszky =?iso-8859-1?Q?G=E1bor?= <Gabor@Zahemszky.HU> Cc: freebsd-questions@freebsd.org Subject: Re: irq256 ???? Message-ID: <20081009214954.GA31617@owl.midgard.homeip.net> In-Reply-To: <20081009225136.6ca47d3b@Picasso.Zahemszky.HU> References: <20081009225136.6ca47d3b@Picasso.Zahemszky.HU>
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On Thu, Oct 09, 2008 at 10:51:36PM +0200, Zahemszky G=E1bor wrote: > Hi! >=20 > I've just found in my machine's vmstat -i output: >=20 > =3D=3D=3D > $ vmstat -i > interrupt total rate > irq1: atkbd0 15524 0 > irq6: fdc0 14 0 > irq12: psm0 279947 16 > irq15: ata1 41835 2 > irq16: uhci0 drm0 1407076 81 > irq17: atapci0 257828 14 > irq19: fwohci0++ 16 0 > irq21: uhci1 ahc0+ 41712 2 > irq22: pcm0 52848 3 > irq23: uhci2 ehci1 1 0 > cpu0: timer 33503897 1929 >=20 >=20 > irq256: em0 42054 2 >=20 > =3D=3D=3D^ >=20 > cpu1: timer 33495040 1928 > Total 69137792 3981 > $ dmesg|fgrep em0 > em0: <Intel(R) PRO/1000 Network Connection 6.9.5> port 0x30c0-0x30df > mem 0x90300000-0x9031ffff,0x90324000-0x90324fff irq 20 at device 25.0 on = pci0=20 > em0: Using MSI interrupt em0: [FILTER] > em0: Ethernet address: 00:19:d1:25:78:0a > $ uname -a > FreeBSD XXX 7.1-PRERELEASE FreeBSD 7.1-PRERELEASE #0: Thu Oct 2 21:35:45= CEST 2008 > root@XXX:/usr/obj/usr/src/sys/GENERIC i386 $=20 > =3D=3D=3D=3D >=20 > What's that? (world and kernel are in sync) It is an MSI-style interrupt [MSI=3DMessage Signaled Interrupt] (available = on PCI-E devices and a few PCI/PCI-X devices.) They get allocated fake irq-numbers starting at 256. I.e. it is a feature, and a bug or indication of any problem. --=20 <Insert your favourite quote here.> Erik Trulsson ertr1013@student.uu.se
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