[dpdk-dev] [RFC] [PATCH v2] libeventdev: event driven programming model framework for DPDK

[Jerin Jacob]

On Fri, Oct 14, 2016 at 10:30:33AM +0000, Hemant Agrawal wrote:

> > > Am I reading this correctly that there is no way to support an
> > > indefinite waiting capability? Or is this just saying that if a timed
> > > wait is performed there are min/max limits for the wait duration?
> > 
> > Application can wait indefinite if required. see
> > RTE_EVENT_DEV_CFG_PER_DEQUEUE_WAIT configuration option.
> > 
> > Trivial application may not need different wait values on each dequeue.This is a
> > performance optimization opportunity for implementation.
> 
>  Jerin, It is irrespective of wait configuration, whether you are using per device wait or per dequeuer wait. 
>  Can the value of MAX_U32 or MAX_U64 be treated as infinite weight? 

That will be yet another check in the fast path in the implementation, I
think, for more fine-grained wait scheme. Let application configure the device
with RTE_EVENT_DEV_CFG_PER_DEQUEUE_WAIT so that the application can have
two different function pointer-based implementation for dequeue function
if required.

With RTE_EVENT_DEV_CFG_PER_DEQUEUE_WAIT configuration, implicitly
MAX_U64 becomes infinite weight as the wait is uint64_t.
I can add this info in v3 if required.

Jerin

> 
> >