<span class="gmail_quote">On 10/4/07, <b class="gmail_sendername">Peter Wright</b> <<a href="mailto:pete@nomadlogic.org">pete@nomadlogic.org</a>> wrote:</span><blockquote class="gmail_quote" style="margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex">
<br>> Greets folks.<br>><br>> Please tolerate today's stupid question:<br>> Is a high amount of interrupts "normal" when using FreeBSD's ATAPICAM?<br>> Perhaps there was a kernel tunable I forgot to tweak, or a kernel option I
<br>> forgot to compile in?<br>><br>> When using growisofs in FreeBSD through the CAM framework, top reports<br>> almost 95% CPU time spent on just interrupts.<br>> As you can imagine, the machine gets pretty lazy to stimuli when this
<br>> happens.<br>><br>> Pointers? Comments? Derisive laughter?<br>><br><br>hmmm - what release of FreeBSD is this? GENERIC kernel exhibiting same<br>behaviour? hardware config? folks'll need at least this much info to
<br>help out.</blockquote><div><br>Apologies for forgetting to include this information:<br>Its FreeBSD 6.2. The kernel is custom built using the same config as GENERIC,<br>but with the "driver atapicam" option added. Hardware is a Compaq R3000 laptop,
<br>ATI IXP chipset with an NEC DVD-RW drive. <br></div><br><br>