Phase 1 OpenACC

[basava70]

Phase 1: Changes from HPC and Data Processing to Improve PR #693

🎯 Goals

• Convert init_tracers_AB subroutine to run completely on the GPU
  This subroutine has three calls to two internal subroutines:
  • tracer_gradient_elements
  • tracer_gradient_z
  • relax_to_clim
• Run benchmarks and compare with Phase0 PR Openacc test main #693

[basava70]

@suvarchal @JanStreffing @mandresm
I have a working and compiling state. I am running benchmarks and will update in the next comment.

[basava70]

Benchmarks for Phase 1.
Since, 1 year simulation in inconclusive, do you want me to add 2 months and 4 months ?

Run Length	Run Length Unit	Steps per Day	CPU (s)	Phase0(s)	Phase1(s)
1	d	32	1.806	125.2253	104.2
1	m	32	55.408	4160.025	3400.23
1	y	32	787.221	> 26400.0	> 26400.0
2	y	32	1287.22	NA	NA

[JanStreffing]

Benchmarks for Phase 2. Since, 1 year simulation in inconclusive, do you want me to add 2 months and 4 months ?
Run Length Run Length Unit Steps per Day CPU (s) Phase1(s) Phase2(s)
1 d 32 1.806 125.2253 104.2
1 m 32 55.408 4160.025 3400.23
1 y 32 787.221 > 26400.0 > 26400.0
2 y 32 1287.22 NA NA

Gives enough of an idea as is IMO.

[basava70]

Benchmarks for Phase 2. Since, 1 year simulation in inconclusive, do you want me to add 2 months and 4 months ?
Run Length Run Length Unit Steps per Day CPU (s) Phase1(s) Phase2(s)
1 d 32 1.806 125.2253 104.2
1 m 32 55.408 4160.025 3400.23
1 y 32 787.221 > 26400.0 > 26400.0
2 y 32 1287.22 NA NA

Gives enough of an idea as is IMO.

Cool. I will leave it for now. You guys review and let me know if anything needs to be done. I will move on to Phase2 PR #734.