[dpdk-dev] [PATCH] eal: support using 0 as coremask for no-affinitization

[Bruce Richardson]

On Tue, Feb 16, 2021 at 10:36:13AM +0000, Burakov, Anatoly wrote:
> On 16-Feb-21 9:43 AM, Bruce Richardson wrote:
> > Allow the user to specify that they don't want any core pinning from DPDK
> > by passing in the coremask of 0.
> > ---
> 
> I haven't checked what happens yet, but down the line we also set affinity
> for service cores as well as interrupt thread. what would be the semantics
> of those in this particular case? do we want the same ability for service
> cores (i.e. pick a non-affinitized core)? And where does interrupt thread
> affinitize in this case (presumably, nowhere too)?
> 
I have not checked the service core setup, because a) I forgot about them
and b) I'm not sure how their affinity rules work with respect to the main
lcore mask. On the other hand I did check out that the lcore mask for all
non-pinned threads, or control threads, is the full set of bits as
expected.

/Bruce