Date: Wed, 28 May 1997 14:15:34 -0700 (PDT) From: asami@vader.cs.berkeley.edu (Satoshi Asami) To: roberto@keltia.freenix.fr Cc: hardware@freebsd.org Subject: Re: Intel Pentium II released Message-ID: <199705282115.OAA06476@vader.cs.berkeley.edu> In-Reply-To: <19970526211440.51805@keltia.freenix.fr> (message from Ollivier Robert on Mon, 26 May 1997 21:14:40 %2B0200)
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* With flags 0x4 or 0x7 (so the real culprit is the copyin/out code) I get * this : * * 202 [21:04] roberto@keltia:~> dd if=/dev/zero of=/dev/null bs=64k count=16000 * 1048576000 bytes transferred in 9.008729 secs (116395552 bytes/sec) * * 203 [21:07] roberto@keltia:~> dd if=/dev/zero of=/dev/null bs=1m count=1000 * 1048576000 bytes transferred in 14.700602 secs (71328779 bytes/sec) I see. I forgot that the K6 is a 586-class CPU. ;) But the main memory speed is still less than 80MB/s that the P5-133/EDO with 2.1.5 (no FP-copy) gets. Is that EDO memory? Bruce, do you think you can add a code to disable the FP-copy when the chip is a 586-class but not from "GenuineIntel" (or whatever)? The only 586-class non-Intel CPU out there is the K6 (K5 too?), right? * I still can't overclock it at 2.5x 83 MHz. Only 2.5x 75 MHz works with the * K6 whereas it worked at 2x 83 MHz for the P133. That is quite normal. Intel is known to have more slack in their chips' specifications in terms of pushing it to the limit than their competitors. (Whether that's good or bad, I won't say. :) Satoshi
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