* RE: [PATCH] examples/l3fwd: relax the RSS/Offload requirement
[not found] <20230511080612.126034-1-trevor.tao@arm.com>
@ 2023-05-11 9:33 ` Trevor Tao
2023-05-11 15:39 ` Stephen Hemminger
0 siblings, 1 reply; 3+ messages in thread
From: Trevor Tao @ 2023-05-11 9:33 UTC (permalink / raw)
To: thomas; +Cc: dev
Hi Thomas, dev group:
After I sent out this patch, I can't find it at the patch site:
https://patches.dpdk.org/project/dpdk/list/?param=2&page=1
I would like to ask if there's anything I should do first here.
Thanks,
Best Regards,
Zijin Tao(Trevor Tao, 陶孜谨)
ARM Electronic Technology (Shanghai) Co., Ltd
安谋电子科技（上海）有限公司
Building 11, Shanghai Busininess ParkⅢ ,
No.1016 Tianlin Rd, Minhang District, Shanghai, 200233 China
上海市闵行区田林路1016号科技绿洲三期2号楼10楼，200233
Cell: +86-153 7109 6192
-----Original Message-----
From: Trevor Tao <trevor.tao@arm.com>
Sent: Thursday, May 11, 2023 4:06 PM
To: thomas@monjalon.net
Cc: dev@dpdk.org; nd <nd@arm.com>; Trevor Tao <Trevor.Tao@arm.com>; stable@dpdk.org
Subject: [PATCH] examples/l3fwd: relax the RSS/Offload requirement
Now the port Rx mq_mode had been set to RTE_ETH_MQ_RX_RSS, and offload mode set to RTE_ETH_RX_OFFLOAD_CHECKSUM by default, but some hardware and/or virtual interface does not support the RSS and offload mode presupposed, e.g., some virtio interfaces in the cloud don't support RSS and may only partly support RTE_ETH_RX_OFFLOAD_UDP_CKSUM/ RTE_ETH_RX_OFFLOAD_TCP_CKSUM, but not RTE_ETH_RX_OFFLOAD_IPV4_CKSUM, and the error msg here:
virtio_dev_configure(): RSS support requested but not supported by the device
Port0 dev_configure = -95
and:
Ethdev port_id=0 requested Rx offloads 0xe doesn't match Rx offloads capabilities 0x201d in rte_eth_dev_configure()
So to enable the l3fwd running in that environment, the Rx mode requirement can be relaxed to reflect the hardware feature reality here, and the l3fwd can run smoothly then.
A warning msg would be provided to user in case it happens here.
Fixes: af75078fece3 ("first public release")
Cc: stable@dpdk.org
Signed-off-by: Trevor Tao <trevor.tao@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Reviewed-by: Feifei Wang <feifei.wang2@arm.com>
---
.mailmap | 1 +
examples/l3fwd/main.c | 18 +++++++++++++++++-
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/.mailmap b/.mailmap
index 0859104404..cf4a59fb41 100644
--- a/.mailmap
+++ b/.mailmap
@@ -1380,6 +1380,7 @@ Tom Rix <trix@redhat.com> Tone Zhang <tone.zhang@arm.com> Tonghao Zhang <xiangxia.m.yue@gmail.com> <nic@opencloud.tech> Tony Nguyen <anthony.l.nguyen@intel.com>
+Trevor Tao <trevor.tao@arm.com>
Tsotne Chakhvadze <tsotne.chakhvadze@intel.com> Tudor Brindus <me@tbrindus.ca> Tudor Cornea <tudor.cornea@gmail.com> <tudor.cornea@keysight.com> diff --git a/examples/l3fwd/main.c b/examples/l3fwd/main.c index a4f061537e..2cdb6b7ae6 100644
--- a/examples/l3fwd/main.c
+++ b/examples/l3fwd/main.c
@@ -1233,8 +1233,12 @@ l3fwd_poll_resource_setup(void)
local_port_conf.rx_adv_conf.rss_conf.rss_hf &=
dev_info.flow_type_rss_offloads;
- if (dev_info.max_rx_queues == 1)
+ /* relax the rx rss requirement */
+ if (dev_info.max_rx_queues == 1 || !local_port_conf.rx_adv_conf.rss_conf.rss_hf) {
+ printf("warning: modified the rx mq_mode to RTE_ETH_MQ_RX_NONE base on"
+ " device capability\n");
local_port_conf.rxmode.mq_mode = RTE_ETH_MQ_RX_NONE;
+ }
if (local_port_conf.rx_adv_conf.rss_conf.rss_hf !=
port_conf.rx_adv_conf.rss_conf.rss_hf) { @@ -1245,6 +1249,18 @@ l3fwd_poll_resource_setup(void)
local_port_conf.rx_adv_conf.rss_conf.rss_hf);
}
+ /* relax the rx offload requirement */
+ if ((local_port_conf.rxmode.offloads & dev_info.rx_offload_capa) !=
+ local_port_conf.rxmode.offloads) {
+ printf("Port %u requested Rx offloads 0x%"PRIx64" doesn't"
+ " match Rx offloads capabilities 0x%"PRIx64"\n",
+ portid, local_port_conf.rxmode.offloads,
+ dev_info.rx_offload_capa);
+ local_port_conf.rxmode.offloads &= dev_info.rx_offload_capa;
+ printf("warning: modified the rx offload to 0x%"PRIx64" based on device"
+ " capability\n", local_port_conf.rxmode.offloads);
+ }
+
ret = rte_eth_dev_configure(portid, nb_rx_queue,
(uint16_t)n_tx_queue, &local_port_conf);
if (ret < 0)
--
2.17.1
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