Subject: Re: painfully slow
To: None <email@example.com>
From: Chris Jones <firstname.lastname@example.org>
Date: 08/20/2007 09:22:35
Okay, I applied the patch and build a GENERIC kernel from it. When I
re-enabled the USB ports and booted the new kernel, "systat vmstat" was
showing 200000 pin 11 interrupts per sample period, and over 60% CPU
time spent in interrupt. I tried extracting pkgsrc.tar.gz as a speed
test, and the machine locked hard.
I then disabled the USB ports and rebooted the new kernel. The SATA
controller is definitely capable of much higher throughput with the
patch applied, which I appreciate. The machine is speedy, even while
it's rewriting its RAID parity.
However, I'm still in essentially the same position: I can either have
my USB controller enabled, and the machine is barely usable; or I can
have good performance but no console keyboard (because USB is disabled).
Any thoughts on what I can do to diagnose the USB problems? Would
"options ACPI" and friends make any difference? Should I try enabling
Thanks again for the help.
Blair Sadewitz wrote:
> You don't have bus master DMA enabled, presumably because there's no
> entry in pcidevs for it. This will force use of PIO mode. Could you
> try adding a line to pcidevs beneath the entry for 0x024a for 0x024b,
> otherwise identical except, obviously, for the PCI device name?