On Tue, December 11, 2007 12:31 pm, Gus Wirth wrote:
> Lan Barnes wrote:
>> I just did a stupid "Send" of a trimmed Gus message. My bad.
>>
>> On Sun, December 9, 2007 6:48 pm, Gus Wirth wrote:
>>
>>> If all three cards are trying to record at the same time you may be
>>> encountering PCI bus latency issues. See this article on the MythTV
>>> Wiki
>>> for more info: http://www.mythtv.org/wiki/index.php/PCI_Latency
>>>
>>
>> That looks terrifically promising. I checked and all three cards were at
>> latency 64. I bumped all three to 128, and added that to /etc/rc.local.
>> We
>> shall see if this problem goes away.
>
> What is the latency setting for the hard drive? It should be set higher
> than the cards. The article recommends setting the hard drive to have a
> latency of 0xb0 (176 dec). Also, the wiki links to an excellent article
> on the IBM Developer Works site
> <http://www-128.ibm.com/developerworks/library/l-hw2.html> which I
> highly recommend reading. That article gives more rational for the
> settings and gives good advice on IRQs (Interrupt Requests).
>
> Gus
>
>
It had two drive controllers (remember, I got the machine used, so I'm
groping my way here).
The first doesn't appear to be used, and I left it alone.
00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller
(rev 02) (prog-if 8a [Master SecP PriP])
Subsystem: ASUSTeK Computer Inc. Unknown device 8089
Flags: bus master, medium devsel, latency 0, IRQ 16
I/O ports at 01f0 [size=8]
I/O ports at 03f4 [size=1]
I/O ports at 0170 [size=8]
I/O ports at 0374 [size=1]
I/O ports at f000 [size=16]
Memory at 50000000 (32-bit, non-prefetchable) [size=1K]
The second was set at 64, and I bumped it up to 0xb0.
02:04.0 RAID bus controller: Silicon Image, Inc. SiI 3112
[SATALink/SATARaid] Serial ATA Controller (rev 02)
Subsystem: Silicon Image, Inc. SiI 3112 SATARaid Controller
Flags: bus master, 66MHz, medium devsel, latency 176, IRQ 20
I/O ports at b800 [size=8]
I/O ports at b400 [size=4]
I/O ports at b000 [size=8]
I/O ports at a800 [size=4]
I/O ports at a400 [size=16]
Memory at d9000000 (32-bit, non-prefetchable) [size=512]
Expansion ROM at e3f80000 [disabled] [size=512K]
Capabilities: [60] Power Management version 2
Reply only if I messed up ... otherwise, let me watch this for a couple of
days and then report whether it turns out to be the secret sauce.
--
Lan Barnes
SCM Analyst Linux Guy
Tcl/Tk Enthusiast Biodiesel Brewer
--
[email protected]
http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
