[QE-users] [QE-GPU] OpenMP is not working with my compilation

[Takahiro Chiba]

Dear users,

I found my attachment is removed by the system. Instead, the file can
be downloaded from the link below.
https://www.scl.kyoto-u.ac.jp/~tchiba/ausurf.tar.gz

I need advice from experienced users!

---Sender---
Takahiro Chiba
1st-year student at grad. school of chem. sci. and eng., Hokkaido Univ.
Expected graduation date: Mar. 2023
takahiro_chiba at eis.hokudai.ac.jp
-----

2021年8月2日(月) 8:00 Takahiro Chiba <takahiro_chiba at eis.hokudai.ac.jp>:
>
> Dear experienced users,
>
> I have trouble in utilizing OpenMP with my compilation. From the
> output file, pw.x 6.8 recognizes "OMP_NUM_THREADS=2", but it took same
> time as "OMP_NUM_THREADS=1", and according to PBS batch queue, only
> 100% (not 200%) of CPU is used. Therefore, QE 6.8 with GPU is not as
> fast as expected.
>
> I used nvidia HPC SDK 20.9, cuda 10.1, and Intel MKL 2021.2. The node
> has two Xeon Gold 6248, one Tesla V100 32GB, and 768GB of RAM.
> Benchmark results and make.inc are attached as tarball.
>
> Could you please point out my mistake?
>
> ---Sender---
> Takahiro Chiba
> 1st-year student at grad. school of chem. sci. and eng., Hokkaido Univ.
> Expected graduation date: Mar. 2023
> takahiro_chiba at eis.hokudai.ac.jp
> -----