[ntp:questions] Time reset
neo.venu at gmail.com
Thu Mar 13 09:32:46 UTC 2008
Hal Murray wrote:
>> So its the DISK I/O thats causing loss of ticks ?
> My first Red Hat system defaulted to no-DMA for IDE disks. (Yes,
> that was a long time ago.) With that setup, it was simple to generate
> lots of lost timer interrupts: just keep the disk busy doing reads.
> (Seeks don't count. Read consecutive sectors.)
> My problem went away when I turned on DMA.
> I have a hack that I originally wrote for measuring disk
> transfer rates. I'll dust it off and put it on the wiki
> if people think it will be helpful for discussions like this.
Ok Hal. This will be certainly helpful.
> It compiles on Linux. It should be easy to get it to work on
> other *nix systems.
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