Bug 884811

Summary:	sys-fs/btrfs-progs: Consider installing hash-speedtest
Product:	Gentoo Linux	Reporter:	RumpletonBongworth <kfm>
Component:	Current packages	Assignee:	Gentoo's Team for Core System packages <base-system>
Status:	RESOLVED OBSOLETE
Severity:	enhancement
Priority:	Normal
Version:	unspecified
Hardware:	All
OS:	Linux
Whiteboard:
Package list:		Runtime testing required:	---
Attachments:	0001-sys-fs-btrfs-progs-Also-install-hash-speedtest.patch

Description RumpletonBongworth 2022-12-08 05:22:29 UTC

Since Linux 5.5, three additional checksum algorithms have been supported by btrfs. These are XXHASH, SHA256 and BLAKE2b. The "all" make target does not cover the hash-speedtest utility. I think that it would be useful if the ebuild were to install it. In particular, XXHASH is an interesting alternative to CRC32C and I was mildly surprised to find that it outperforms CRC32C on my hardware.

Comment 1 RumpletonBongworth 2022-12-08 05:28:56 UTC

Created attachment 840903 [details, diff]
0001-sys-fs-btrfs-progs-Also-install-hash-speedtest.patch

I'm not sure that this is the best way of going about it but it worked for me.

Comment 2 RumpletonBongworth 2022-12-08 06:32:37 UTC

On second thoughts, I'm retracting this request. The hash-speedtest utility doesn't make use of the kernel crypto API, so one cannot necessarily assume that the benchmark results are indicative of the performance that can be expected.