On Fri, 7 Nov 2003, Stefan [iso-8859-1] Eßer wrote: > On 2003-11-07 20:04 +1100, Bruce Evans <[EMAIL PROTECTED]> wrote: > > However, using the apic almost doubles the overheads for the a45 cases. > > This seems to be due to extra interrupts. The UART and/or driver already > > Just another data point: > > Seems that the interrupt rate doubled for drm0 on my system > (from 60 to 120 driving a LCD at 60Hz vertical refresh). > > I thought this might be a problem with shared interrupts (drm0 > and xl0 shared APIC IRQ 16), but removing the (actually unused) > xl driver did not make a difference ...
Hmm. My a45 UARTs are the only ones with a pci level triggered interrupt: Nov 7 01:48:44 gamplex kernel: ioapic0: Routing IRQ 5 -> intpin 19 Nov 7 01:48:44 gamplex kernel: ioapic0: intpin 5 disabled Nov 7 01:48:44 gamplex kernel: ioapic0: intpin 19 trigger: level Nov 7 01:48:44 gamplex kernel: ioapic0: intpin 19 polarity: active-lo There is only one other level triggered interrupt the system that is used: Nov 7 01:48:44 gamplex kernel: ioapic0: Routing IRQ 11 -> intpin 18 Nov 7 01:48:44 gamplex kernel: ioapic0: intpin 11 disabled Nov 7 01:48:44 gamplex kernel: ioapic0: intpin 18 trigger: level Nov 7 01:48:44 gamplex kernel: ioapic0: intpin 18 polarity: active-lo and I suspect it may be doing strange things too: I found that rev.1.23 of ata_lowlevel.c broke atapicam, but the new interrupt code magically fixed it. One of the atapicam devices is the only device on IRQ11. Bruce _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[EMAIL PROTECTED]"