Strange Results

Discussion created by ryta1203 on Jan 13, 2010
Latest reply on Jan 18, 2010 by bpurnomo

Kernel 1:

ALU: 68

TEX: 3

CF: 7

Reported ALU:Fetch = 2.92

Kernel 2:

ALU: 56

TEX: 3

CF: 5

Reported ALU:Fetch = 4.67

There are no loops in either kernel.

Kernel 1 is running faster, does this make any sense at all? It doesn't to me, why is this? The only thing I can think of is that they are FETCH bound!?

Both kernels run in about the same time, so that's my conclusion.

MY QUESTION IS THIS: Why is the SKA reporting seemingly incorrect ALU:Fetch ratios? I could see this if the Bottleneck was FETCH or Global Read/Write, but it reports it as ALU (even though it's obviuosly not).

I'm just curious why the strange ALU:Fetch ratio reporting? Any ideas anyone?