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alexander-dumbass

03/03/14 2:44 PM

#130972 RE: This Causes an Error #130945

It looks like the ARM and x86 GB versions were compiled with the same flags.

John Poole of Primate labs was talking about the ARM code generator quality produced by the GCC 4.2 compiler.

The GCC 4.2.0 compiler which was originally released on May 2007. 4.6.0 x86 was released March 2011.
4.8.0 x86 was released March 2013.

The ARM versions were likely generated in the same time frame so I don't know why Poole chose the old ARM compiler although it does not surprise me.

mas

03/04/14 4:42 AM

#131030 RE: This Causes an Error #130945

Good for him to have taken the initiative to TRY to come up with a decent low level benchmark in a barren mobile benchmarking landscape.

So just because he's come up with a free benchmark we should just accept it as the gold standard by which you boldly claimed A7 was twice as fast as Merrifield no ifs buts or maybe ? The comparison you used was flawed. Flawed in that Merrifield's score was 32-bit so missed out on a ~10% 64-bit uplift. Flawed in that Silvermont does not have SHA accelerator instructions so A7 has another ~10% apples to pears advantage. Flawed in that WTH are cryptology tests doing in a general purpose integer benchmark in the first place.

Everybody has to deal with imperfect benchmarks, the real analytical deal is recognizing those imperfections and parsing what is relevant out of those benchmarks to the conclusive statement you are trying to make. You did not do that, you just saw a headline figure, took it as gospel and then went and wrote a sensationalist and what you thought was news-breaking article out of it. This is how tabloid journalists work, shock and then print the real facts later if they don't tally with the original piece.

You also still have not proven how Geekbench is more relevant to a mobile user than WebXPRT in revealing to him/her which processor is faster for their general needs or that WebXPRT is a useless tainted benchmark which you implied.

mas

03/04/14 5:22 AM

#131033 RE: This Causes an Error #130945

That does not back up your original claim that ARM processors were crippled on GB2 just ones that run on iOS. Silvermont does relatively better in GB2 (integer) against Android ARM chips than in GB3 even though it has an AES advantage in GB3. Something else for you to ponder before deciding GB3 is the first, last and only word in low-level cpu benchmarks.