Search found 8294 matches

by mkcolg
Mon Mar 30, 2020 7:08 am
Forum: General Programming
Topic: Performance issues with llvm and openmp
Replies: 1
Views: 4

Re: Performance issues with llvm and openmp

Hi Eric, Is this a known difference between the two? No, it not expected and something we'd consider a bug. It almost seems as if there is more thread overhead when launching a parallel section with the llvm compiler. The non-LLVM compiler uses our older runtime that inlined OpenMP regions to reduce...
by mkcolg
Mon Mar 30, 2020 6:42 am
Forum: General Programming
Topic: pgcc error
Replies: 2
Views: 8

Re: pgcc error

Hi Zhifeng, The error here are because pgcc doesn't use the flags "-qversion" or "-fsigned-char". Our equivalent flags are "-V" and "-Mschar". Is configure aborting due to this and not something else? Typically it will attempt several flags until if find the correct one for the compiler. Are there a...
by mkcolg
Fri Mar 27, 2020 4:23 pm
Forum: General Programming
Topic: Bug report: OpenMP atomic with -O0 or -O1 optimization levels (PGI19 or PGI20)
Replies: 1
Views: 11

Re: Bug report: OpenMP atomic with -O0 or -O1 optimization levels (PGI19 or PGI20)

Thanks for the report Emeric. This is a new one that we haven't seen before and I'm not sure what's triggering the compiler error, nor see an easy work-around.

I've created a new problem report (TPR #28315) and sent it our engineers for further investigation.

-Mat
by mkcolg
Fri Mar 27, 2020 11:32 am
Forum: Accelerator Programming
Topic: Variable does not get stored in CUDA Kernel
Replies: 1
Views: 10

Re: Variable does not get stored in CUDA Kernel

Hi Marcres, Difficult to tell what's wrong without a full reproducing example. Can you please provide one? Does "c" have the managed or device attribute? I assume it does since otherwise I would expect that the code would error with an illegal memory address if it wasn't. Is mx an array or a scalar?...
by mkcolg
Fri Mar 27, 2020 11:18 am
Forum: Accelerator Programming
Topic: Problem with pgprof
Replies: 1
Views: 11

Re: Problem with pgprof

Hi Henrique, What CUDA version did you build with and what CUDA driver version do you have? It's possible that if there's a CUDA mismatch, this could cause this type of error. Note that you may consider moving to using NVIDIA's Nsight Systems profiler ( https://developer.nvidia.com/nsight-systems )....