From: "Gunnar Von Boehn" <gunnar@genesi-usa.com>
To: munroesj@us.ibm.com
Cc: David Jander <david.jander@protonic.nl>,
John Rigby <jrigby@freescale.com>,
linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>,
prodyut hazarika <prodyuth@gmail.com>
Subject: Re: Efficient memcpy()/memmove() for G2/G3 cores...
Date: Thu, 4 Sep 2008 17:14:11 +0200 [thread overview]
Message-ID: <b989d750809040814q2594c054i7dece706c49668f1@mail.gmail.com> (raw)
In-Reply-To: <1220538673.28869.261.camel@spokane1.rchland.ibm.com>
Hi Steve,
> I have personally optimized memcpy for power4/5/6 and they are all
> different. There are dozens of different PPC implementations from
> different manufacturers and design, every one is different! With painful
> negotiation I was able to get the --with-cpu= framework added to glibc
> but not all distro use it. You can thank me later
Steve, you make it sound like very many different PowerPC chips:
You said you did the Power 4, Power 5 , Power 6 and now Power 7 routines.
And there are the 970 and the Cell.
While this sounds like 7 different PPC chips.
But aren't this actually only 2 main families?
Wouldn't it be possible to create two main routine to cover all?
One type that performs good on the family of Power4/5 and 7.
And one that performs good on the family of P6 and Cell?
How are the Linux hackers handling this?
Maybe there is room for consolidating?
Cheers
Gunnar
next prev parent reply other threads:[~2008-09-04 15:14 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-25 9:31 Efficient memcpy()/memmove() for G2/G3 cores David Jander
2008-08-25 11:00 ` Matt Sealey
2008-08-25 13:06 ` David Jander
2008-08-25 22:28 ` Benjamin Herrenschmidt
2008-08-27 21:04 ` Steven Munroe
2008-08-29 11:48 ` David Jander
2008-08-29 12:21 ` Joakim Tjernlund
2008-09-01 7:23 ` David Jander
2008-09-01 9:36 ` Joakim Tjernlund
2008-09-02 13:12 ` David Jander
2008-09-03 6:43 ` Joakim Tjernlund
2008-09-03 20:33 ` prodyut hazarika
2008-09-04 2:04 ` Paul Mackerras
2008-09-04 12:05 ` David Jander
2008-09-04 12:19 ` Josh Boyer
2008-09-04 12:59 ` David Jander
2008-09-04 14:31 ` Steven Munroe
2008-09-04 14:45 ` Gunnar Von Boehn
2008-09-04 15:14 ` Gunnar Von Boehn [this message]
2008-09-04 16:25 ` David Jander
2008-09-04 15:01 ` Gunnar Von Boehn
2008-09-04 16:32 ` David Jander
2008-09-04 18:14 ` prodyut hazarika
2008-08-29 20:34 ` Steven Munroe
2008-09-01 8:29 ` David Jander
2008-08-31 8:28 ` Benjamin Herrenschmidt
2008-09-01 6:42 ` David Jander
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