Add parallel benchmark: Merge Sort

[Sudha247]

Source: https://github.com/ckoparkar/ocaml-benchmarks/blob/master/mergesort.ml

Sandmark has a mergesort (https://github.com/ocaml-bench/sandmark/blob/main/benchmarks/multicore-numerical/mergesort_multicore.ml), would be nice to compare the two versions.

[ernestmusong]

Hi @Sudha247 can I work on this?

[Sudha247]

Sure, you can go ahead. Please not that the benchmarks in the repo are written for an older version of domainslib and may require updating. Don't hesitate to post here if you have any questions on errors or building the benchmark.

[ernestmusong]

Sure, you can go ahead. Please not that the benchmarks in the repo are written for an older version of domainslib and may require updating. Don't hesitate to post here if you have any questions on errors or building the benchmark.

Thanks @Sudha247 I'm getting started

[ernestmusong]

Hi @Sudha247 I'm stuck filtering and running parallel benchmarks. I've used these commands:-

TAG='"run_in_ci"' make run_config_filtered.json
USE_SYS_DUNE_HACK=1 RUN_CONFIG_JSON=multicore_parallel_run_config.json make ocaml-versions/5.0.0+trunk.bench

But it's not filtering them. Look at this:-
Done: 2/190 (jobs: 1)

[ernestmusong]

Sure, you can go ahead. Please not that the benchmarks in the repo are written for an older version of domainslib and may require updating. Don't hesitate to post here if you have any questions on errors or building the benchmark.

Hi @Sudha247 some benchmarks did not run successfully. So as you mentioned the need to update, please what should be updated domainslib or the benchmarks?