Hello Honnappa,

On Sun, May 3, 2020 at 11:32 PM Honnappa Nagarahalli
[off-list ref] wrote:

<snip>

quoted

Subject: Re: [PATCH v2 0/2] Use WFE for spinlock and ring

On Sun, Apr 26, 2020 at 10:39 AM Gavin Hu [off-list ref] wrote:

quoted

The rte_wait_until_equal_xxx APIs abstract the functionality of
'polling for a memory location to become equal to a given value'[1].

Use the API for the rte spinlock and ring implementations.

[1] http://patches.dpdk.org/cover/62703/

Gavin Hu (2):
  spinlock: use wfe to reduce contention on aarch64
  ring: use wfe to wait for ring tail update on aarch64

This would result in rte_ring and rte_spinlock APIs becoming experimental
and this breaks compilation for external applications using stable ring and
spinlock APIs.
IIRC, it was the reason why these patches were dropped with the introduction
of the rte_wait_until_equal_* API.

Agreed, the rte_ring new sync modes are resulting in different use cases for these APIs. We need to take a relook at the APIs.

Will we reconsider this series now that the wait until equal is going stable?


-- 
David Marchand