On Thu, 27 Feb 2020 17:20:45 +0000
Ferruh Yigit [off-list ref] wrote:

On 2/24/2020 11:11 PM, Stephen Hemminger wrote:

quoted

The maximum number of rings in af_packet is hard coded as 16.
The user should be able to configure this as part of DPDK config.

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 config/common_base                        | 1 +
 drivers/net/af_packet/rte_eth_af_packet.c | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/config/common_base b/config/common_base
index 6ea9c63cc36b..dd154a474b57 100644
--- a/config/common_base
+++ b/config/common_base

@@ -468,6 +468,7 @@ CONFIG_RTE_LIBRTE_VMXNET3_DEBUG_TX_FREE=n
 # Compile software PMD backed by AF_PACKET sockets (Linux only)
 #
 CONFIG_RTE_LIBRTE_PMD_AF_PACKET=n
+CONFIG_RTE_PMD_AF_PACKET_MAX_RINGS=16
   

Not sure about adding a new config option for this.

There is already "qpairs" devarg, allocating queues dynamically, instead of
using a per-defined sized arrays, should enable removing
'RTE_PMD_AF_PACKET_MAX_RINGS' completely.

But the current driver does not allow qpairs > 16.
This is a config option to allow more.