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Add SIMD metadata in /proc on Linux

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Too many times, people's performance problems have amounted to
"somehow your SIMD support isn't working", and determining that
at runtime is difficult to describe to people.

This adds a /proc/spl/kstat/zfs/simd node, which exposes
metadata about which instructions ZFS thinks it can use,
on AArch64 and x86_64 Linux, to make investigating things
like this much easier.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #16530
This commit is contained in:
Rich Ercolani
2024-09-20 11:16:44 -04:00
committed by Tony Hutter
parent 0987892160
commit 9616275021
7 changed files with 207 additions and 0 deletions
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lib/libspl/include/sys/simd.h
+3
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@@ -592,4 +592,7 @@ zfs_isa207_available(void)
#endif
extern void simd_stat_init(void);
extern void simd_stat_fini(void);
#endif /* _LIBSPL_SYS_SIMD_H */