how does Anand Tech measure GFLOPS on a GPU?

[krishnapallavi]

Hi,
I have come across Anand Tech's comparision of POWERVR SGX GPUs incorporated in various SOCs in the fallowing article http://www.anandtech.com/show/6522/the-clover-trail-atom-z2760-review-acers-w510-tested/5

Among the various parameters considered for comparision, I am curious to know how anandtech measures the GFLOPs on a certain platform.

does anybody have an Idea?

 

[NostaSeronx]

MADs * 2 * GHz = GFlops

 

[krishnapallavi]

uh, actually I dont have any idea about MADs aswell,
what is a MAD? and how can Gflops be derived as MADs*2* Ghz??
and this GFlops measurement is not done based on some standard workload? like a benchmark?
Thanks for the reply

 

[Tuna-Fish]

uh, actually I dont have any idea about MADs aswell,
what is a MAD? and how can Gflops be derived as MADs*2* Ghz??
and this GFlops measurement is not done based on some standard workload? like a benchmark?
Thanks for the reply

MAD, also goes by MADD or FMA, means "Fused multiply-add", or "a = b * c + d", the basic FP operation. The gflops number is not a measurement, it's just the count of FMA units in the device, multiplied by two (because it has two operations, + and *), multiplied by clock speed.