On Mon, 24 Apr 2000, Andrew Morton wrote:
> I have done some measurements on this. The worst case interrupt
> blockage within the IDE code when using UDMA with DMA is 90 microseconds
> (500MHz CPU). When interrupts are unmasked this comes down to 32 usecs
> worst case. Compare this with the console code's 3,000 microseconds.
> More details at http://www.uow.edu.au/~andrewm/ide-intr.txt
> If you're concerned about latency you must knock off the peaks. With
> DMA, IDE is down in the noise floor. And that unmasking code is pretty
> scary stuff....
> > PS: Andre: funny your E-Mail address :-)
> Not funny if you're stuck using dialup :-(
I have a static IP with lDSL..........go figure......
The Linux ATA/IDE guy
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