Re: [dpdk-users] l3fwd rte_eth_rx_queue_setup: err=-22

[Chris Hall <chris.hall@stackpath.com>]

Andrew,

Thanks again, I thought I had already applied these changes. Rebuilt everything, and l3fwd works as expected.
Is there a way to get any stats from l3fwd ?

Thanks
Chris


> On 02/09/2017 02:14 AM, Chris Hall wrote:
>> I’m having a bit of trouble running the l3fwd example program, I keep getting the error “rte_eth_rx_queue_setup: err=-22”
>> No matter what options I supply. Wondering if I’m missing something ?
>
>The problem is that almost all (all except testpmd which has
>command-line option to override default) DPDK example application use
>hardcoded number of the Rx/Tx descriptors instead of usage of limits
>advertised by PMD in rte_eth_dev_info_get() (structure rte_eth_dev_info,
>member rx_desc_lim). The following tiny patch solves the problem, but it
>s still hardcode (better and right solution is to write few lines of
>code which adjust defaults using information provided by the PMD - we
>have plans, since sfc_efx PMD is affected, to run through example
>applications and suggest patches)
>
>===
>diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c
>index a50d628..1cc6465 100644
>--- a/examples/l3fwd/main.c
>+++ b/examples/l3fwd/main.c
>@@ -82,7 +82,7 @@
> /*
> * Configurable number of RX/TX ring descriptors
> */
>-#define RTE_TEST_RX_DESC_DEFAULT 128
>+#define RTE_TEST_RX_DESC_DEFAULT 512