Messages in this thread | | | Date | Thu, 29 Nov 2007 09:40:20 +1100 | Subject | Re: 2.6.24-rc3-git3: usb hardware interrupts using 25% of CPU time | From | (Tony Breeds) |
| |
On Wed, Nov 28, 2007 at 10:33:18PM +0000, 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:
Hi Frederik, Thanks for the report. We suspect that this is an accounting problem introduced when powerpc enabled NO_HZ and highres timers. Fortunatley from the testing we've done it doens't actually look like the time is being spent in hardware interupts, just accounted for there. Yours Tony
linux.conf.au http://linux.conf.au/ || http://lca2008.linux.org.au/ Jan 28 - Feb 02 2008 The Australian Linux Technical Conference!
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |