Zstd: can't create ZSTDMT_CCtx if number of cores > 128

[rgdoliveira]

I'm compiling zstd in a Powerpc machine (ppc64le) and it builds fine, but when I try to run the test suite it fails with the following error:
"zstd: error 30 : allocation error : can't create ZSTDMT_CCtx"

zstd defines the max number of cores as 128 (ZSTDMT_NBTHREADS_MAX 128) but the Power machine I'm using has 160 cores and the test break.

In this case I guess the execution should continue and use the max number of cores instead of breaking it.

[Cyan4973]

That's a good point @rgdoliveira !

[Cyan4973]

I modified the version in dev branch to accept up to 256 threads.
It will also automatically cap to this new limit when requested more than this value, instead of triggering an error as you experienced.

[rgdoliveira]

thanks @Cyan4973, As this issue is fixed in dev branch and I guess it will be part of a future zstd release, I'm closing this issue.