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From: Stan Sieler <sieler@allegro.com>
To: dave@hiauly1.hia.nrc.ca (John David Anglin)
Cc: parisc-linux@thepuffingroup.com
Subject: Re: [parisc-linux] Progress
Date: Mon, 22 Nov 1999 10:27:25 -0800 (PST)	[thread overview]
Message-ID: <199911221827.KAA13990@opus.allegro.com> (raw)
In-Reply-To: <199911221811.NAA27290@hiauly1.hia.nrc.ca> from "John David Anglin" at Nov 22, 1999 01:11:29 PM

Re:

> Missed this point because of the strange nop.  The current addib loop is 3
> instructions.  Alignment to a multiple of 16 should be good enough to
> ensure that the loop lies within a cache line.  This would insert a maximum
> of 3 nops before the loop.  This would provide a slightly more deterministic
> result.
> 
> Also, re the BogoMIPS number, I think this should be (loops_per_sec*3)/2000000
...

This should be timed on a PA-RISC 2.0 machine, just in case.  Some of
them are really good at apparently doing things twice as fast as you'd
expect :)    

Our K460 gets twice the MIPs you'd expect ... i.e., it executes a simple 
timing loop at about 360 million instructions per second ... 
on a single CPU machine with a 180 MHz clock!

-- 
Stan Sieler                                           sieler@allegro.com
www.allegro.com/sieler/wanted/index.html          www.allegro.com/sieler

  reply	other threads:[~1999-11-22 18:25 UTC|newest]

Thread overview: 50+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
1999-11-18 23:16 [parisc-linux] Progress John David Anglin
1999-11-19  3:30 ` Philipp Rumpf
1999-11-21 23:07   ` John David Anglin
1999-11-22  1:12     ` John David Anglin
1999-11-22  8:24       ` Philipp Rumpf
1999-11-22  9:59         ` Alan Cox
1999-11-22 15:54           ` Philipp Rumpf
1999-11-22  7:30     ` Philipp Rumpf
1999-11-22 18:11       ` John David Anglin
1999-11-22 18:27         ` Stan Sieler [this message]
1999-11-22 18:42           ` Philipp Rumpf
1999-11-22 18:33         ` Philipp Rumpf
1999-11-22 20:55           ` John David Anglin
1999-11-23 11:47             ` Philipp Rumpf
1999-11-23 16:19               ` John David Anglin
1999-11-23 18:03                 ` Philipp Rumpf
1999-11-23 19:01                   ` John David Anglin
1999-11-23 21:11                   ` Stan Sieler
1999-11-24 10:00                     ` Philipp Rumpf
1999-11-24 19:00                       ` Stan Sieler
1999-11-24 19:33                         ` Philipp Rumpf
1999-11-24 20:55                           ` [parisc-linux] Progress - Update John David Anglin
1999-11-24 21:05                             ` Philipp Rumpf
1999-11-24 21:27                               ` Kirk Bresniker
1999-11-24 21:37                                 ` Philipp Rumpf
1999-11-24 22:38                                   ` Frank Rowand
1999-11-24 23:24                                     ` Cache Flushes Grant Grundler
1999-11-25  0:31                             ` [parisc-linux] Progress - Update John David Anglin
1999-11-25  1:17                               ` Alan Cox
1999-11-25 13:24                                 ` Philipp Rumpf
1999-11-25 23:47                                   ` John David Anglin
1999-11-30 18:17                                     ` John David Anglin
1999-11-30 18:21                                       ` Alan Cox
1999-11-30 18:32                                       ` Philipp Rumpf
1999-11-30 19:31                                         ` Alan Cox
1999-11-30 20:14                                           ` Mark Klein
1999-11-30 23:40                                             ` John David Anglin
1999-12-01 15:41                                               ` Philipp Rumpf
1999-12-01 18:03                                                 ` Alan Cox
1999-12-01 18:29                                                   ` Alex deVries
1999-12-01 18:34                                                     ` Alan Cox
1999-12-02  2:51                                                     ` Philipp Rumpf
1999-12-01 18:33                                                   ` John David Anglin
1999-12-01 18:54                                                     ` Alan Cox
1999-12-01 18:55                                                     ` Grant Grundler
1999-11-26 13:40                             ` Matthew Wilcox
1999-11-23 15:59       ` [parisc-linux] Progress Paul Bame
1999-11-23 16:33         ` John David Anglin
1999-11-23 17:05           ` Paul Bame
1999-11-23 20:15         ` John David Anglin

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