- From: Michael Borland <michael_borland_at_lynceantech.com>
- Date: Sun, 07 Sep 2003 12:00:58 -0700
Following the suggestion from Frank I was able to get a look at the kernel messages on the console. (Although I have to switch to the console before the machine crashes, since after the crash it is completely unresponsive.) When the machine crashes, I see this message shortly before the crash: plx9080: cancel() timed out waiting for dma 1 done set The machine crashes shortly after that, and not always in the same place. I added calls to syslog() to the mmap demo, so I could see what it was asking comedi to do. Usually, the machine crashes before mmap is able to open the comedi device again, but sometimes it crashes sooner. --Michael Michael Borland wrote: > > I'm using an MCC PCI DAS6402/16 on Slackware 9, kernel 2.4.20, gcc > version 3.2.2. When I run the mmap demo repeatedly, the computer > eventually locks up and has to be rebooted (with the hardware reset > switch). How many times I have to run before it crashes is not > reproducible. Sometimes it crashes the first time, sometimes only after > 50 or more runs. > > I'm using the ADC only, reading 1000 samples from 32 differential > channels with the ADC pacer trigger and the start-acquisition external > trigger. I also tried the cmd demo, and it behaves the same way. > > <snip>
Received on 2003-09-07Z18:00:58