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Message-Id: <200711290002.01850.rjw@sisk.pl> Date: Thu, 29 Nov 2007 00:02:01 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Frederik Himpe <fhimpe@...enet.be> Cc: linux-kernel@...r.kernel.org, linux-usb-devel@...ts.sourceforge.net Subject: Re: 2.6.24-rc3-git3: usb hardware interrupts using 25% of CPU time On Wednesday, 28 of November 2007, Frederik Himpe wrote: > I installed Linux 2.6.24-rc3-git3 on a PPC based Apple Powerbook G4 > system. Now with top I see that over 20% of CPU time is used by hardware > interrupts. Looking at /proc/interrupts, the number in the row > ohci_hcd:usb1 is rising very quickly: What's the last kernel that worked correctly? > $ cat /proc/interrupts > CPU0 > 21: 1 MPIC 1 Edge i2sbus: i2s-a (tx) > 24: 11008 MPIC 1 Level ide1 > 25: 33608 MPIC 1 Level VIA-PMU > 26: 56 MPIC 1 Level keywest i2c > 27: 1 MPIC 1 Edge i2sbus: i2s-a (rx) > 29: 281578 MPIC 1 Level ohci_hcd:usb1 > 30: 0 MPIC 1 Level i2sbus: i2s-a (control) > 31: 0 MPIC 1 Level i2sbus: i2s-b (control) > 33: 1 MPIC 1 Edge i2sbus: i2s-b (tx) > 34: 1 MPIC 1 Edge i2sbus: i2s-b (rx) > 39: 41611 MPIC 1 Level ide0 > 40: 2 MPIC 1 Level ohci1394 > 41: 0 MPIC 1 Level eth0 > 42: 0 MPIC 1 Level keywest i2c > 47: 2826 MPIC 1 Level GPIO1 ADB > 48: 58633 MPIC 1 Level radeon@pci:0000:00:10.0 > 52: 18961 MPIC 1 Level b43 > 53: 1 MPIC 1 Level yenta > 61: 1 MPIC 1 Edge headphone-detect > 63: 0 MPIC 1 Level ohci_hcd:usb2, ohci_hcd:usb3, > ehci_hcd:usb4 > BAD: 187917 > > $ lspci -nn > 0000:00:0b.0 Host bridge [0600]: Apple Computer Inc. UniNorth 2 AGP > [106b:0034] > 0000:00:10.0 VGA compatible controller [0300]: ATI Technologies Inc RV350 > [Mobility Radeon 9600 M10] [1002:4e50] > 0001:10:0b.0 Host bridge [0600]: Apple Computer Inc. UniNorth 2 PCI > [106b:0035] > 0001:10:12.0 Network controller [0280]: Broadcom Corporation BCM4306 > 802.11b/g Wireless LAN Controller [14e4:4320] (rev 03) > 0001:10:13.0 CardBus bridge [0607]: Texas Instruments PCI1510 PC card > Cardbus Controller [104c:ac56] > 0001:10:17.0 Unknown class [ff00]: Apple Computer Inc. KeyLargo/Intrepid > Mac I/O [106b:003e] > 0001:10:19.0 USB Controller [0c03]: Apple Computer Inc. KeyLargo/Intrepid > USB [106b:003f] > 0001:10:1a.0 USB Controller [0c03]: Apple Computer Inc. KeyLargo/Intrepid > USB [106b:003f] > 0001:10:1b.0 USB Controller [0c03]: NEC Corporation USB [1033:0035] (rev > 43) > 0001:10:1b.1 USB Controller [0c03]: NEC Corporation USB [1033:0035] (rev > 43) > 0001:10:1b.2 USB Controller [0c03]: NEC Corporation USB 2.0 [1033:00e0] > (rev 04) > 0002:24:0b.0 Host bridge [0600]: Apple Computer Inc. UniNorth 2 Internal > PCI [106b:0036] > 0002:24:0d.0 Unknown class [ff00]: Apple Computer Inc. UniNorth/Intrepid > ATA/100 [106b:003b] > 0002:24:0e.0 FireWire (IEEE 1394) [0c00]: Apple Computer Inc. UniNorth 2 > FireWire [106b:0031] (rev 81) > 0002:24:0f.0 Ethernet controller [0200]: Apple Computer Inc. UniNorth 2 > GMAC (Sun GEM) [106b:0032] (rev 80) > > > Full dmesg, .config and lsmod output can be found on > http://artipc10.vub.ac.be/linux-2.6.24-rc3-git3/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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