[PATCH v2] efd: lookup with RISC-V vector extension

[David Marchand]

Hello,

Thanks for the patch.


On Wed, 4 Mar 2026 at 16:17, P1erreCashon <2022302111412 at whu.edu.cn> wrote:
>
> Implement EFD lookup internal function for RISC-V architecture
> using RISC-V Vector Extension instruction set
>
> Performance results (EFD perf autotest)
> These performance results are the average of five test runs.
> Results (in CPU cycles/operation):
>
> Before optimization:
> Keysize           Add               Lookup            Lookup_bulk       Delete
> 4                 136.0            5.6               5.0               25.6
> 8                 149.4            6.0               6.0               31.4
> 16                156.8           8.0               7.0               36.8
> 32                179.2           13.0             14.0              45.4
> 48                205.8           13.0             15.0              45.6
> 64                214.4           16.0            18.4               46.6
> 9                 152.8             6.2              6.0               30.0
> 13                160.6            7.2               7.0               35.0
> 37                191.2            12.0             13.0              44.2
> 40                195.0            12.0             13.6              43.2
>
> After optimization:
> Keysize           Add               Lookup            Lookup_bulk       Delete
> 4                 131.6             5.0               5.0               26.6
> 8                 143.6             6.0               6.2               33.0
> 16                153.2            7.0               7.0               35.8
> 32                173.6            14.0             14.0             45.0
> 48                201.6            12.6             14.0             46.2
> 64                211.4            15.0             16.0             46.8
> 9                 146.6             6.0               6.0              30.6
> 13                154.8            7.0               7.0               35.0
> 37                189.2            11.0             12.2             45.4
> 40                191.8            11.0             12.4             43.8

I am not sure what is significant in those numbers.
For someone like me who does not run efd test, the difference seems quite small.

Could you add more details?

>
> This patch is co-developed with Gong Xiaofei.
>
> Signed-off-by: gong-flying <gongxiaofei24 at iscas.ac.cn>
> Signed-off-by: P1erreCashon <2022302111412 at whu.edu.cn>

Please, use real names in the signatures, like for example:
Signed-off-by: Gong Xiaofei <gongxiaofei24 at iscas.ac.cn>

P1erre looks like an alias.

-- 
David Marchand