Messages in this thread | ![/](/images/icornerl.gif) | | Date | Sun, 20 Apr 2003 16:11:52 -0400 (EDT) | From | Zwane Mwaikambo <> | Subject | Re: irq balancing; kernel vs. userspace |
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On Sun, 20 Apr 2003, Sean Neakums wrote:
> I thought I'd play with the userspace IRQ-balancer, but booting with > noirqbalance seems not to not balance. Possibly I misunderstand how > this all fits together. > > $ uname -a > Linux peng-33 2.5.68 #1 SMP Sun Apr 20 13:06:57 IST 2003 i686 unknown unknown GNU/Linux > $ cat /proc/cmdline > auto BOOT_IMAGE=default ro root=801 noirqbalance > $ cat /proc/interrupts > CPU0 CPU1 > 0: 853487 854900 IO-APIC-edge timer > 1: 9 4 IO-APIC-edge i8042 > 2: 0 0 XT-PIC cascade > 4: 15548 15161 IO-APIC-edge serial > 8: 2 1 IO-APIC-edge rtc > 9: 3 2 IO-APIC-level eth1 > 10: 1784 1805 IO-APIC-level via82cxxx, eth0 > 11: 10939 10860 IO-APIC-level aic7xxx > 12: 39 21 IO-APIC-edge i8042 > NMI: 0 0 > LOC: 1708150 1708149 > ERR: 0 > MIS: 0
Local APICs before P4 by default arbitrated for interrupt handling, via a round robin type scheme, this doesn't seem to be the case with P4 since the Arbitration ID register is also gone now.
Zwane -- function.linuxpower.ca - 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/
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