IBM utilise le CELL dans un serveur lame

Citation :près de 400 GFLOPS

Citation :It will run at 4GHz, producing a not inconsiderable 256Gflops, with the cells connected to the central 64MB memory through a switched 1024 bit bus

Citation :En comparaison, combien de GFlops développe un P4?

Citation :The current 3.06 GHz Pentium 4 has a theoretical peak of 12 gigaflops (SSE) per chip.

Citation :Pour le P4 ça dépend de la fréquence, à 3.8GHz il développe environ 15 GFlops
Le Cell à 4 GHZ en utlisant la FPU (2 FMAD) et la VMX (4 FMAD) du PPE et tous les SPE on monte à 304GFlops, 228GFlops à 3GHz etc...

Citation :canti a écrit :
d'ailleur si je me rapelle bien un site tres bien informé, les FLOP simple précisions ( que IBM annonce a 200GFLOP) sont baclé ( ils ne correspondent pas aux normes pour parler officiellement de flop ... ils ne sont pas aussi précis que necessaire, mais dans une console de jeu, ou un HDTV, ca n'a aucune importance... dans une station de travail par contre c'est pas pareil )

alors que pour faire du Double Précision, on tombe a 20GFLOP ( pas mal attention... c'est du gros ) de FLOP officiel

http://www.realworldtech.com/page. [...] 084318&p=4

"these SP operations are not fully IEEE754 compliant in terms of rounding modes"
a comparer avec des bagettes donc...

Citation :As described previously, the prototype CELL processor’s claim to fame is its ability to sustain a high throughput rate of floating point operations. The peak rating of 256 GFlops for the prototype CELL processor is unmatched by any other device announced to date. However, the SPE’s are designed for speed rather than accuracy, and the 8 floating point operations per cycle are single precision (SP) operations. Moreover, these SP operations are not fully IEEE754 compliant in terms of rounding modes. In particular, the SP FPU in the SPE rounds to zero. In this manner, the CELL processor reveals its roots in Sony's Emotion Engine. Similar to the Emotion Engine, the SPE’s single precision FPU also eschewed rounding mode trivialities for speed. Unlike the Emotion Engine, the SPE contains a double precision (DP) unit. According to IBM, the SPE’s double precision unit is fully IEEE854 compliant. This improvement represents a significant capability, as it allows the SPE to handle applications that require DP arithmetic, which was not possible for the Emotion Engine.

Naturally, nothing comes for free and the cost of computation using the DP FPU is performance. Since multiple iterations of the same FPU resources are needed for each DP computation, peak throughput of DP FP computation is substantially lower than the peak throughput of SP FP computation. The estimate given by IBM at ISSCC 2005 was that the DP FP computation in the SPE has an approximate 10:1 disadvantage in terms of throughput compared to SP FP computation. Given this estimate, the peak DP FP throughput of an 8 SPE CELL processor is approximately 25~30 GFlops when the DP FP capability of the PPE is also taken into consideration. In comparison, Earth Simulator, the machine that previously held the honor as the world’s fastest supercomputer, uses a variant of NEC’s SX-5 CPU (0.15um, 500 MHz) and achieves a rating of 8 GFlops per CPU. Clearly, the CELL processor contains enough compute power to present itself as a serious competitor not only in the multimedia-entertainment industry, but also in the scientific community that covets DP FP performance. That is, if the non-trivial challenges presented by the programming model of the CELL processor can be overcome, the CELL processor may be a serious competitor in applications that its predecessor, the Emotion Engine, could not cover.

Citation :combien devais develloper le cell sur ps2 ??? ca devais aussi etre un monstre de puissance et avais aussi une declinaison serveur du prozo de la ps2...
on a vu le resultats

edit: c etais meme une potentiel ARME DE DESTRUCTION MASSIVE LOL

Citation :combien devais develloper le cell sur ps2 ??? ca devais aussi etre un monstre de puissance et avais aussi une declinaison serveur du prozo de la ps2...
on a vu le resultats

edit: c etais meme une potentiel ARME DE DESTRUCTION MASSIVE LOL