[dpdk-dev] [PATCH v2 3/6] app/test: add basic dmadev copy tests

[Jerin Jacob]

On Thu, Sep 2, 2021 at 5:13 PM Bruce Richardson
<bruce.richardson at intel.com> wrote:
>
> On Thu, Sep 02, 2021 at 04:24:18PM +0530, Jerin Jacob wrote:
> >
> > I think 25us will not be enough, e.s.p If is PCI-Dev to PCI-Dev kind
> > of test cases.
> > Since it is the functional test case, I think, we can keep it a very
> > higher range to
> > support all cases. Maybe 50ms is a good target.
> >
>
> Sure, no problem to push it up. If it turns out that all upstreamed drivers
> implement the "idle" function we can remove the fallback option completely,
> but I'll keep it for now and push timeout up. Do you really think it needs
> to be in the (tens of )millisecond range? Even for tests going across PCI
> would most transactions not complete in the microsecond range, e.g. 100
> usec?

Based on busload and size of buffers the completion time can vary. I
think, 1 ms could be
good trade-off. Also, In the future some HW needs beyond that then we
can increase.