In Profiler, some Counters cant be choosen. Why? I am unable to choose any of the 4 "coalesced&#

Accelerated Computing CUDA CUDA Programming and Performance
1

Hi!

I’m trying to use the Visual Profiler (2.3.10, XP, FX 4800) and it works fine, beside one issue. I am unable to choose any of the 4 “coalesced” or “uncoalesced” options in the “Profile Counters” tab under session settings. The 4 are all greyed unlike all other options which I can choose. Does anyone have a similar problem or a solution to my problem? I noticed that I can choose these options if I use an earlier version of the profiler, but then other issues appeared…

Thanks a lot!

Jimmy

2

Some are only available on compute 1.1 devices, others are available from compute 1.2 and up.

3

Hi!

Yeah, I know. But the thing is that the FX 4800 is compute capability 1.3, so that doesn’t explain it. You’re not experiencing the same problem then I assume.

Thanks for your input

4

My compute 1.2 card shows me the 32/64/128 bit load/store counters (which represent coalesced loads of various bit widths)

and my compute 1.1 card shows me some unspecified global load and store counters instead.

So I guess compute 1.2 and 1.3 are able to report the global load and stores by bit width, whereas it’s all in one counter on compute 1.0 and 1.1

5

Ok.

Anyone else have any input or similar problems?

6

Maybe the code is compiled for older devices? (sm_10 or something like this)

7

Hi!

Yeah, I thought of that too, but both the .cu (only file) and the project are set to 1.3. Also, the profiler sees that I have a FX 4800 card. You don’t have this problem then I assume?

8

These counters are not available on 1.3 (or 1.2) hardware, since the whole notion of coalesced vs uncoalesced does not exist anymore on those types of hardware.

32/64/128 bit load/store counters are not available on 1.0 and 1.1 hardware since they represent the ‘new-way’ of memory accesses in the newer hardware.

So to make the answer as short as possible, you do not have a problem :)