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110 GIPS is not too much for 141 CPU. My Core i7 4700HQ CPU dos 3 GIPS/core at 2.9 GHz.

by aries1980 12y ago

dfox 12y ago
It depends on what kinds of instructions you count. I strongly suspect that your 3GIps number is only register-to-register integer arithmetic, while the 110GIps is some IBM-ish "mixed workload" that uses most of the System/z instruction set. (which includes things like "get CRC32 of this buffer" as one instruction)
- aries1980 12y ago
  Average of Dhrystone and Whetstone, which is not a proper benchmark indeed. Those special instructions such as CRC32 or SHA256 are rarely needed in scientific simulations such as Monte Carlo simulations or real-time working with Bayesian Network, what this system is aimed for. In these scenarios raw power and big on-board caches what matter and on paper the POWER8 has these, but 110 GIPS is not the best bang for bucks.
  - dfox 12y ago
    System z is completely different thing from what is currently called Power Systems. Target market for System z is pretty much limited to OLTP and most of the weirdness of the platform comes from the fact that it is heavily optimized for exactly that and not for raw speed in two's-complement or FP arithmetics.
gojock 12y ago
yes but buying 3 of them gets you 3 machines that can do 3GIPS, not one machine that can do 9GIPS
- Erwin 12y ago
  That's a standard consumer chips though. The Xeon server line can, with the E7-8895 v2 do 15 cores per CPU and you can have 8 of them for a total of 240 hyperthreaded cores. I don't know what could take advantage of that and what the tradeoffs for scheduling etc. would be but Sun will sell you one: http://www.oracle.com/us/products/servers-storage/servers/x86/x4-8/overview/index.html http://www.oracle.com/us/products/servers-storage/servers/x8... -- 6TB of RAM.
- aries1980 12y ago
  True, but that is rather motherboard-design and core-stacking question. x86 CPUs are made for consumer use-cases, but that doesn't mean it can't be stacked almost linearly, like the Knights Landing CPUs.

110 GIPS is not too much for 141 CPU. My Core i7 4700HQ CPU dos 3 GIPS/core at 2.9 GHz.

dfox 12y ago

It depends on what kinds of instructions you count. I strongly suspect that your 3GIps number is only register-to-register integer arithmetic, while the 110GIps is some IBM-ish "mixed workload" that uses most of the System/z instruction set. (which includes things like "get CRC32 of this buffer" as one instruction)

aries1980 12y ago
Average of Dhrystone and Whetstone, which is not a proper benchmark indeed. Those special instructions such as CRC32 or SHA256 are rarely needed in scientific simulations such as Monte Carlo simulations or real-time working with Bayesian Network, what this system is aimed for. In these scenarios raw power and big on-board caches what matter and on paper the POWER8 has these, but 110 GIPS is not the best bang for bucks.
- dfox 12y ago
  System z is completely different thing from what is currently called Power Systems. Target market for System z is pretty much limited to OLTP and most of the weirdness of the platform comes from the fact that it is heavily optimized for exactly that and not for raw speed in two's-complement or FP arithmetics.

gojock 12y ago

yes but buying 3 of them gets you 3 machines that can do 3GIPS, not one machine that can do 9GIPS

Erwin 12y ago
That's a standard consumer chips though. The Xeon server line can, with the E7-8895 v2 do 15 cores per CPU and you can have 8 of them for a total of 240 hyperthreaded cores. I don't know what could take advantage of that and what the tradeoffs for scheduling etc. would be but Sun will sell you one: http://www.oracle.com/us/products/servers-storage/servers/x86/x4-8/overview/index.html http://www.oracle.com/us/products/servers-storage/servers/x8... -- 6TB of RAM.
aries1980 12y ago
True, but that is rather motherboard-design and core-stacking question. x86 CPUs are made for consumer use-cases, but that doesn't mean it can't be stacked almost linearly, like the Knights Landing CPUs.