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From: grog@FreeBSD.ORG
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Subject: Re: Pentium II-266Mhz
In-Reply-To: <199705260701.KAA02064@shadows.aeon.net> from mika ruohotie at "May 26, 97 10:01:12 am"
To: bsdchat@shadows.aeon.net (mika ruohotie)
Date: Mon, 26 May 1997 20:53:20 +0800 (CST)
Cc: chat@FreeBSD.ORG (FreeBSD Chat)
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mika ruohotie writes:
>>> 8:13pm crh> dd if=/dev/zero of=/dev/null bs=1m count=1000
>>> 1000+0 records in
>>> 1000+0 records out
>>> 1048576000 bytes transferred in 9.969560 secs (105177762 bytes/sec)
>>>
>>> 8:14pm crh> dd if=/dev/zero of=/dev/null bs=128k count=8000
>>> 8000+0 records in
>>> 8000+0 records out
>>> 1048576000 bytes transferred in 4.389535 secs (238880886 bytes/sec)
>
> pluto# dd if=/dev/zero of=/dev/null bs=1m count=1000
> 1000+0 records in
> 1000+0 records out
> 1048576000 bytes transferred in 8.786672 secs (119337105 bytes/sec)
> pluto# dd if=/dev/zero of=/dev/null bs=128k count=8000
> 8000+0 records in
> 8000+0 records out
> 1048576000 bytes transferred in 8.661279 secs (121064798 bytes/sec)
>
> just a thought here... which motherboard you used?
>
> my test is gigabyte ga586hx512, and as far as i see this, the board/chipset
> is faster in pci performance, but ofcourse, coz of external l2, it's slower
> in that...

OK, is this really *the* performance measurement?  I'm sitting here in
my hotel room in Beijing with a seriously underpowered AcerNote Light
(75 MHz Pentium, allegedly (and I can believe it) with no cache), and
I get:

=== grog@papillon (/dev/ttyp3) ~ 7 -> dd if=/dev/zero of=/dev/null bs=1m count=1000
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 17.784494 secs (58960125 bytes/sec)
=== grog@papillon (/dev/ttyp3) ~ 8 -> dd if=/dev/zero of=/dev/null bs=128k count=8000
8000+0 records in
8000+0 records out
1048576000 bytes transferred in 17.022243 secs (61600343 bytes/sec)
=== grog@papillon (/dev/ttyp3) ~ 9 -> 

Sure, it's noticably slower, but not as much as I would have hoped for
your sake.

Greg