[Libre-soc-dev] [OT-ish] POWER9 gzip hardware support

Lauri Kasanen cand at gmx.com
Wed Nov 18 13:21:02 GMT 2020

On Wed, 18 Nov 2020 11:17:07 +0000
Luke Kenneth Casson Leighton <lkcl at lkcl.net> wrote:

> https://twitter.com/carlosedp/status/1328424799216021511
> 10 years and a speedup from 23s to 0.094s on gzip has finally made it
> into the linux ppc64 kernel.

Slightly related, I was told by an IBM rep that the crypto accelerator
in the same chip is not recommended for use. While it has great
throughput, it's off chip and its latency is high, plus it's BE. So for
a LE system you need to byteswap too, and it's usually
faster to use the in-core aes/sha instructions.

- Lauri

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