Damian Funnell wrote:
This is great info. I am running on an Intel box and attempting to go to a dual AMD Opteron setup on a Tyan board. I am not having luck luck getting my numbers above 99.6%. I've disabled every hardware gadget and service not needed and still haven't had much luck. I'm going to try a custom kernel as opposed to the stock one's I've tried, but that's been about 4 different OS's with the same results. Is there something to disable on Opteron's that would be the equivalent of disabling hyperthreading? Oh, and I even tried setting the pci latencies and it made no noticeable difference.
1. Check that the TDMP is on it's own IRQ (much to our embarrassment our card wasn't at the time, so we had to play with it a bit to get it to occupy a unique IRQ). 2. Disable hyper threading on the Xeon CPU. 3. Uninstall our SCSI hardware and replace it with IDE hardware. 4. Upgrade to the latest stable releases of Asterisk, Zaptel and Libpri.
We made changes 1 and 2 in the above list and are prepared to make changes 3 and 4 if we find the problem hasn't gone away. It hasn't happened in over two weeks now (after occuring many times per day for a while), so we hopefully won't have to throw out our SCSI hardware. After we made each change (1 and 2 were made about two weeks apart from each other) we found that the quality improved, with the incidence of the issue halving after '1' and disappearing (hopefully for good) after '2'. Incidentally the results of zttest *did not* noticeably improve after making these changes (it is still below 99.98%).
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