[PATCH v10 1/2] mempool cache: add zero-copy get and put functions

[Morten Brørup]

> From: Kamalakshitha Aligeri [mailto:kamalakshitha.aligeri at arm.com]
> Sent: Friday, 24 February 2023 19.11
> 
> From: = Morten Brørup <mb at smartsharesystems.com>

This should be:

From: Morten Brørup <mb at smartsharesystems.com>

It could be fixed while merging. This is the only complaint in patchwork.

> 
> Zero-copy access to mempool caches is beneficial for PMD performance,
> and
> must be provided by the mempool library to fix [Bug 1052] without a
> performance regression.
> 
> [Bug 1052]: https://bugs.dpdk.org/show_bug.cgi?id=1052
> 
> Bugzilla ID: 1052
> 
> Signed-off-by: Morten Brørup <mb at smartsharesystems.com>
> Signed-off-by: Kamalakshitha Aligeri <kamalakshitha.aligeri at arm.com>

Can we get some reviews/acks on this please? I would like to see mempool zero-copy go into DPDK before 23.11.

Please also note that the warnings and errors in patchwork regarding patch 2/2 are bogus or unrelated.

> ---
> v10:
> * Added mempool test cases with zero-copy API's

For the parts not provided by myself, i.e. the test cases:

Acked-by: Morten Brørup <mb at smartsharesystems.com>

[...]

> diff --git a/lib/mempool/version.map b/lib/mempool/version.map
> index dff2d1cb55..06cb83ad9d 100644
> --- a/lib/mempool/version.map
> +++ b/lib/mempool/version.map
> @@ -49,6 +49,15 @@ EXPERIMENTAL {
>  	__rte_mempool_trace_get_contig_blocks;
>  	__rte_mempool_trace_default_cache;
>  	__rte_mempool_trace_cache_flush;
> +	__rte_mempool_trace_ops_populate;
> +	__rte_mempool_trace_ops_alloc;
> +	__rte_mempool_trace_ops_free;
> +	__rte_mempool_trace_set_ops_byname;
> +
> +	# added in 23.03

Time is passing, so now this should be updated to 23.07

It could be fixed while merging.

> +	__rte_mempool_trace_cache_zc_put_bulk;
> +	__rte_mempool_trace_cache_zc_put_rewind;
> +	__rte_mempool_trace_cache_zc_get_bulk;
>  };
> 
>  INTERNAL {