Messages in this thread | | | Subject | Re: [PATCH] NCR53c406a.c warning | From | Alan Cox <> | Date | Fri, 12 Sep 2003 15:47:35 +0100 |
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On Gwe, 2003-09-12 at 15:16, Maciej W. Rozycki wrote: > I've encountered an ISA adapter using this chip in polled mode (no ISA > IRQ line routed to the chip) quite recently. But I can't say if the guy > using it won't throw it away before final 2.6. ;-)
For a lot of these dumb controllers polled I/O seems to materially outperform interrupt driven I/O on SMP boxes - its true of the NCR5380 for example. We trade a ton of locking jamming the box up for a CPU thats spending some of its time pretending to be half a scsi chip.
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