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....@intel.com)
> -----Original Message----- > From: dev [mailto:dev-boun...@dpdk.org] On Behalf Of Pablo de Lara > Sent: Wednesday, April 26, 2017 7:30 PM > To: dev@dpdk.org > Cc: De Lara Guarch, Pablo <pablo.de.lara.gua...@intel.com>; > sta...@dpdk.org > Subject: [dpdk-dev] [PATCH] examples/l3fwd-power: fix Rx descriptor size > > 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: sta...@dpdk.org > > Signed-off-by: Pablo de Lara <pablo.de.lara.gua...@intel.com> > --- > examples/l3fwd-power/main.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c > index ec40a17..7a8e1cd 100644 > --- a/examples/l3fwd-power/main.c > +++ b/examples/l3fwd-power/main.c > @@ -147,7 +147,7 @@ > /* > * Configurable number of RX/TX ring descriptors > */ > -#define RTE_TEST_RX_DESC_DEFAULT 128 > +#define RTE_TEST_RX_DESC_DEFAULT 512 > #define RTE_TEST_TX_DESC_DEFAULT 512 > static uint16_t nb_rxd = RTE_TEST_RX_DESC_DEFAULT; > static uint16_t nb_txd = RTE_TEST_TX_DESC_DEFAULT; > -- > 2.7.4
