[RFC 2/3] lib: add fastmem library

[Mattias Rönnblom]

On 5/27/26 16:22, Stephen Hemminger wrote:
> On Mon, 25 May 2026 12:36:41 +0200
> Mattias Rönnblom <hofors at lysator.liu.se> wrote:
> 
>> +
>> +static __rte_always_inline struct fastmem_cache *
>> +cache_get(struct fastmem_socket_state *socket, unsigned int class_idx,
>> +		unsigned int lcore_id)
> 
> Do not use always_inline. With current compilers using always inline
> makes the optimizer generate worse code. The only exceptions would
> be where inline is required to make assembly work or you have good benchmark
> data that proves that always_inline generates > 1% performance gain.
> 
> To much of DPDK use __rte_always_inline as "cargo cult" it is faster setting.

__rte_always_inline is still useful, but it is rare. For example, it may 
be required in certain situations to force constant propagation to 
actually occur.

I'm removing both inline and always_inline. Doesn't make a difference, 
so noise.