Future Domain 881: How fast?
Timothy L. Kay
tim at cit-vax.Caltech.Edu
Sat Jul 7 09:14:57 AEST 1990
I have seen quite a discussion about performance tuning the Adaptec
controller. I have a Future Domain 881, and I am curious just how
fast I should expect it to be. I did
dd if=/unix of=/dev/null bs=32k
and clocked about 170 KB/s. I did a
dd if=/dev/rdsk/0p0 of=/dev/null bs=32k count=100
and clocked about 360 KB/s. First of all, are these all I can
expect? I understand that the 881 is a slower controller, and
I have only a 386/20 anyway.
Secondly, why do I get timings like
0.1u 9.1s 0:07 130%
in which I get more than 100% of the machine? Is it that
the accounting is messed up because interrupts are being
turned off for a non-trivial amount of time or something
like that?
Tim
More information about the Comp.unix.i386
mailing list