IA64 and emulator performance
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From: jsavard on 25 Oct 2006 08:29 Graeme Gill wrote: > jsavard(a)ecn.ab.ca wrote: > > lack thereof) it seems to me that the Itanium is the closest thing to a > > mass-market supercomputer chip there is. Which may not be saying much, > I thought all the NVidia and ATI GPU cards out there were the closest > thing to a mass-market supercomputer chip actually :-) Ever since we lost 3dfx, those things aren't documented... Also, for some odd reason, GPU processors in video cards tend to do low-precision arithmetic, and don't include the ability to process 64-bit floating-point numbers. They may be "like" a supercomputer, but they can't really substitute for one, although in a few cases it's been tried... maybe we will see something interesting out of the AMD purchase of ATI. John Savard
From: Thomas Womack on 25 Oct 2006 14:06 In article <1161779395.797274.289050(a)i3g2000cwc.googlegroups.com>, <jsavard(a)ecn.ab.ca> wrote: >Graeme Gill wrote: >> jsavard(a)ecn.ab.ca wrote: > >> > lack thereof) it seems to me that the Itanium is the closest thing to a >> > mass-market supercomputer chip there is. Which may not be saying much, > >> I thought all the NVidia and ATI GPU cards out there were the closest >> thing to a mass-market supercomputer chip actually :-) > >Ever since we lost 3dfx, those things aren't documented... > >Also, for some odd reason, GPU processors in video cards tend to do >low-precision arithmetic, and don't include the ability to process >64-bit floating-point numbers. They have enough gigaflops, I believe, that they quite often still have enough gigaflops even once you've used one of the odd kludges writing numbers as A+B with the exponent of B precisely 23 less than that of A to get something around 44 bits of mantissa, and 44 bits is more often enough than 23. There are vague rumours that DirectX 10 includes 32-bit integer arithmetic, which again is slightly more often enough than 23. Tom
From: ranjit_mathews@yahoo.com on 7 Nov 2006 08:10 Rick Jones wrote: > Ketil Malde <ketil+news(a)ii.uib.no> wrote: > > I can't seem to find any (post-Montecito) numbers on IA64 and > > performance on 32-bit code. Does anybody know about relevant > > benchmarks or even approximate performance numbers? > > IIRC there are at least three architectures for which there are > emulators on IA64: > > *) "x86" under Linux > *) PA-RISC under HP-UX > *) SPARC under something from Fujitsu I don't know that there is a SPARC emulator, but there's an IBM mainframe emulator. > And since it is often a point of confusion, even though you did say > emulated in the subject but just "performance on 32-bit code" in the > body, there is also native Itanium 32-bit application support in > HP-UX. > > Hopefully that will help you narrow your search. > > rick jones > -- > portable adj, code that compiles under more than one compiler > these opinions are mine, all mine; HP might not want them anyway... :) > feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
From: Robert Klute on 7 Nov 2006 12:43 On 7 Nov 2006 05:10:37 -0800, "ranjit_mathews(a)yahoo.com" <ranjit_mathews(a)yahoo.com> wrote: > >Rick Jones wrote: >> Ketil Malde <ketil+news(a)ii.uib.no> wrote: >> > I can't seem to find any (post-Montecito) numbers on IA64 and >> > performance on 32-bit code. Does anybody know about relevant >> > benchmarks or even approximate performance numbers? >> >> IIRC there are at least three architectures for which there are >> emulators on IA64: >> >> *) "x86" under Linux >> *) PA-RISC under HP-UX >> *) SPARC under something from Fujitsu > >I don't know that there is a SPARC emulator, but there's an IBM >mainframe emulator. > SPARC emulator: http://www.transitive.com/ IBM Z series: http://www.platform-solutions.com/products.php
From: lynn on 8 Nov 2006 12:07
ranjit_mathews(a)yahoo.com wrote: > I don't know that there is a SPARC emulator, but there's an IBM > mainframe emulator. there are a number of commercial mainframe emulator products ... there is also at least hercules open source implementation http://www.conmicro.cx/hercules/ which is available on a number of platforms. in some sense, there are some similarities between the current generations of mainframe emulators and the majority of the ("real") mainframe implementations in the 60s, 70s, and thru the 80s ... i.e. microcode engines where the 360/370/390/etc. implementation was microcode running on the microcode engines. in fact, one of the early targets for 801/risc processors was a project to try and consolidate the large variety of internal microprocessors. collected past posts mentioning the large variety of internal microproprocessors and low-level microcoding http://www.garlic.com/`lynn/subtopic.html#mcode misc. past posts mentioning hercules http://www.garlic.com/~lynn/2001n.html#22 Hercules, OCO, and IBM missing a great opportunity http://www.garlic.com/~lynn/2001n.html#31 Hercules etc. IBM not just missing a great opportunity... http://www.garlic.com/~lynn/2001n.html#32 Hercules etc. IBM not just missing a great opportunity... http://www.garlic.com/~lynn/2001n.html#34 Hercules etc. IBM not just missing a great opportunity... http://www.garlic.com/~lynn/2001n.html#37 Hercules etc. IBM not just missing a great opportunity... http://www.garlic.com/~lynn/2001n.html#67 Hercules etc. IBM not just missing a great opportunity... http://www.garlic.com/~lynn/2002d.html#4 IBM Mainframe at home http://www.garlic.com/~lynn/2002g.html#61 GE 625/635 Reference + Smart Hardware http://www.garlic.com/~lynn/2002i.html#31 : Re: AS/400 and MVS - clarification please http://www.garlic.com/~lynn/2002i.html#63 Hercules and System/390 - do we need it? http://www.garlic.com/~lynn/2002i.html#64 Hercules and System/390 - do we need it? http://www.garlic.com/~lynn/2002i.html#69 Hercules and System/390 - do we need it? http://www.garlic.com/~lynn/2004g.html#19 HERCULES http://www.garlic.com/~lynn/2004g.html#29 [IBM-MAIN] HERCULES http://www.garlic.com/~lynn/2004g.html#48 Hercules http://www.garlic.com/~lynn/2006c.html#46 Hercules 3.04 announcement http://www.garlic.com/~lynn/2006d.html#1 Hercules 3.04 announcement http://www.garlic.com/~lynn/2006d.html#3 Hercules 3.04 announcement http://www.garlic.com/~lynn/2006d.html#15 Hercules 3.04 announcement http://www.garlic.com/~lynn/2006d.html#19 Hercules 3.04 announcement |