Re: [RFC PATCH 00/16] btrfs: offload compression to hardware accelerators

[Christoph Hellwig <hch@infradead.org>]

On Fri, Nov 28, 2025 at 07:04:48PM +0000, Giovanni Cabiddu wrote:
> +---------------------------+---------+---------+---------+---------+
> |                           | QAT-L9  | ZSTD-L3 | ZLIB-L3 | LZO-L1  |
> +---------------------------+---------+---------+---------+---------+
> | Disk Write TPUT (GiB/s)   | 6.5     | 5.2     | 2.2     | 6.5     |
> +---------------------------+---------+---------+---------+---------+
> | CPU utils %age @208 cores | 4.56%   | 15.67%  | 12.79%  | 19.85%  |
> +---------------------------+---------+---------+---------+---------+
> | Compression Ratio         | 34%     | 35%     | 37%     | 58%     |
> +---------------------------+---------+---------+---------+---------+

Is it just me, or do the numbers not look all that great at least
when comparing to ZSTD-L3 and LZO-L1?  What are the decompression
numbers?