[dpdk-dev] [PATCH] examples/l3fwd-power: fix Rx descriptor size

[Thomas Monjalon]

28/04/2017 09:47, Yao, Lei A:
> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Pablo de Lara
> > 
> > L3fwd power app monitors the RX queues to see if the polling frequency
> > should be adjusted (the busier the queue, the higher the frequency).
> > The app uses several thresholds in the ring to determine the frequency,
> > being 96 the highest one, when frequency should be highest.
> > 
> > The problem is that the difference between this value and the ring size
> > is not big enough (128 - 96 = 32 descriptors), which means that
> > if the descriptors are not replenished quick enough, queue might
> > not be busy, but the app would think that it is, because 96th descriptor
> > is set.
> > 
> > Therefore, by increasing this gap (increasing the RX ring size),
> > we make sure that this false measurement will not happen.
> > 
> > Fixes: b451aa39db31 ("examples/l3fwd-power: use DD bit rather than RX
> > queue count")
> > Cc: stable at dpdk.org
> > 
> > Signed-off-by: Pablo de Lara <pablo.de.lara.guarch at intel.com>

> I have test this patch based on 17.05-rc2 , issue is fixed. Host frequency can 
> be changed according to the data throughput. 
> Tested-by: Lei Yao (lei.a.yao at intel.com)

Applied, thanks