[Rpm-maint] [rpm-software-management/rpm] Enable thread autodetection for a parallel compression. (#1324)
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Sat Aug 8 09:08:24 UTC 2020
> I think it should at least follow the same convention as XZ: T with no numbers mean autodetection (its okay if 0 means that too). This seems to silently change XZ behavior too which is not okay.
I'm going to update the documentation of my change. Yes, it was intentional to sync behavior of `T0` and `T`, as `zstd` and `xz` use `-T0` in order to autodetect number of threads.
> We'll need some sort of resource manager (no matter how crude) in rpm sooner than later to handle this sort of stuff, but in the meanwhile I think a first step towards sanity could be axing the crazily complicated logic from XZ and simply limit threading to 64bit platforms.
Works for me.
> And with that, it should be possible to refactor this to use common thread-number autodetection code between xzstd and the XZ case.
I would like to. Currently, `xz` uses the memory limit. That functionality is missing for `zstd`, but as said, it does not work for concurrent creation of `rpm` files.
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