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Re: Thread benchmarks, round 2

Previous thread: Problem to build hpcarm-netbsd-current by Jens Wurm on Friday, October 5, 2007 - 8:32 am. (1 message)

Next thread: Re: Thread benchmarks, round 2 by Rodrigo Rubira Branco (BSDaemon) on Friday, October 5, 2007 - 11:51 am. (1 message)
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From: Christos Zoulas <christos@...>
To: <tech-kern@...>
Subject: Re: Thread benchmarks, round 2
Date: Friday, October 5, 2007 - 1:53 pm

In article <20071005172402.GA2716@panix.com>,


NetBSD's amd64 performance sucks right now. My DELL WS 470, runs a *lot*

slower with NetBSD/amd64 than running NetBSD/i386...


christos
[view original message]
From: Matthias Scheler <tron@...>
To: <tech-kern@...>
Subject: Re: Thread benchmarks, round 2
Date: Monday, October 8, 2007 - 11:25 am

What kind of CPUs does that machine have? The EM64T support in Intel's

Netburst CPUs is well known for its bad performance.


	Kind regards


--

Matthias Scheler                                  http://zhadum.org.uk/
[view original message]
From: Andrew Doran <ad@...>
To: Christos Zoulas <christos@...>
Cc: <tech-kern@...>
Subject: Re: Thread benchmarks, round 2
Date: Friday, October 5, 2007 - 2:05 pm

From what I have seen a lot of this is to do with the pmap. It's missing a

lot of optimizations that have been made to i386, particularly deferred

address space switching. Threaded programs in particular are much slower on

amd64 for that reason. Once the two pmaps are finally merged then things

should be a lot better.


Andrew
Previous thread: Problem to build hpcarm-netbsd-current by Jens Wurm on Friday, October 5, 2007 - 8:32 am. (1 message)

Next thread: Re: Thread benchmarks, round 2 by Rodrigo Rubira Branco (BSDaemon) on Friday, October 5, 2007 - 11:51 am. (1 message)