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| Message-ID | <4E19FCB0.1060602@SPAM.comp-arch.net> (permalink) |
|---|---|
| Date | 2011-07-10 12:25 -0700 |
| From | "Andy \"Krazy\" Glew" <andy@SPAM.comp-arch.net> |
| Organization | comp-arch.net |
| Newsgroups | comp.arch |
| Subject | Re: Very good news from AMD |
| References | <251375a3-3e9e-4fa1-a25d-f755f475d378@glegroupsg2000goo.googlegroups.com> <87liw6q9he.fsf@NaN.sparse.dyndns.org> |
On 7/10/2011 11:25 AM, Jason Riedy wrote: > And MitchAlsup writes: >> Thus, a single thread could get about 1/8th of the machine >> performance. > > Actually, only one instruction is allowed in the 40-deep pipe at > a time. So it's 1/40th of 500MHz (XMT, 220MHz MTA2, etc.)... > This machine makes Amdahl giggle, but it can keep all its TiBs of > memory busy. The GPUs allow multiple cycles of a vector instruction to be in the pipe at the same time. AMD also says that the current GPUs allow different clauses, as long as they are guaranteed independent, to be in the pipe at the same time.
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Re: Very good news from AMD MitchAlsup <MitchAlsup@aol.com> - 2011-07-10 11:11 -0700
Re: Very good news from AMD Jason Riedy <jason@lovesgoodfood.com> - 2011-07-10 14:25 -0400
Re: Very good news from AMD "Andy \"Krazy\" Glew" <andy@SPAM.comp-arch.net> - 2011-07-10 12:25 -0700
Re: Very good news from AMD Quadibloc <jsavard@ecn.ab.ca> - 2011-07-10 15:29 -0700
Re: Very good news from AMD Quadibloc <jsavard@ecn.ab.ca> - 2011-07-10 15:32 -0700
Re: Very good news from AMD Jason Riedy <jason@lovesgoodfood.com> - 2011-07-11 08:37 -0400
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