[dpdk-dev] EAL lcore config

[Burakov, Anatoly]

On 03-Apr-19 4:04 AM, Stephen Hemminger wrote:
> Currently the DPDK Environment Abstraction Layer has its guts on the floor ;-)
> The data structure for lcore config is a holey mess and changing it would
> break the ABI.
> 
> I propose that for 19.05 we introduce accessor functions and change all
> internal (out side of eal directory) to use those. And add a deprecation notice.
> 
> For 19.08, we can mark the data structure as deprecated but keep it
> the same.  Any thing built from source that hits the global variable
> will get a warning. Binaries will still run unmodified.
> 
> For 19.11, lcore_config can be moved to eal_private.h where it belongs,
> and some simple rearrangements will shrink it and get almost all data
> on the same cache line. This breaks ABI but API stays the same as 19.05
> 
> After that some of the debris can be cleaned out without affecting
> API or ABI in future.
> 

To be fair, the entire EAL API should receive the same treatment :) 
There are a lot of cases where the "reasonable" way to access something 
is to use a shared internal structure. I've attempted to fix some of 
that on the memory side by introducing a mountain of new API's, but more 
work is needed.

-- 
Thanks,
Anatoly