On Mon, 5 Mar 2001, E.B. Dreger wrote:
> > Date: Sun, 04 Mar 2001 19:39:09 -0600
> > From: David A. Gobeille <[EMAIL PROTECTED]>
> >
> > It would also be interesting to see the numbers for an Athlon/PIII
> > system with DDR, if anyone has such a machine.
>
> Personally, I'd be [more] interested in a ServerWorks III HE core chipset
> with four-way interleaved SDRAM. :-)
I've got a ServerWorks III HE-SL system with 512MB of two-way
interleaved PC133 SDRAM and dual PIII-800's. Is that close enough?
:-)
Here is my "memory bandwidth test", much much simpler and less
scientific than Matt's:
dd if=/dev/zero of=/dev/null bs=10m count=1000
1000+0 records in
1000+0 records out
10485760000 bytes transferred in 23.716504 secs (442129245 bytes/sec)
I just did a recent 4.2-STABLE 'make -j 4 buildworld' on that system
in just over 34 minutes. Here's the time output:
1980.707u 768.223s 34:20.89 133.3% 1297+1456k 39517+6202io 1661pf+0w
> If one _truly_ needs the bandwidth of Rambus (which, IIRC, is
> higher real-world latency than SDRAM), then how about having the
> bus bandwidth to back it up?
The higher real-world latency of RDRAM over SDRAM is what makes the
benefits of its higher bandwidth so questionable. PC2100 DDR-SDRAM --
which has higher latencies than regular SDRAM but still lower than
RDRAM -- should have it beat soundly, though we'll have to wait for
some systems that are actually designed to take advantage of it to say
for sure. :-)
-- Chris Dillon - [EMAIL PROTECTED] - [EMAIL PROTECTED]
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