> itself is a bad thing, particularly given the amount of CPU overhead that
> IDE drives demand while attached to the controller (orders of magnitude
> higher than a good SCSI controller) - the more overhead we can hand off to
I know this is just a troll by a scsi-believer, but I'm biting anyway.
on current machines and disks, ide costs a few % CPU, depending on
which CPU, disk, kernel, the sustained bandwidth, etc. I've measured
this using the now-trendy method of noticing how much the IO costs
a separate, CPU-bound benchmark: load = 1 - (unloadedPerf / loadedPerf).
my cheesy duron/600 desktop typically shows ~2% actual cost when running
bonnie's block IO tests.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:21 EST