Re: [dpdk-dev] [PATCH] examples: ipv4, udp and tcp checksum offload warning
From: Stephen Hemminger <stephen@networkplumber.org>
Date: 2021-09-13 15:11:59
On Mon, 13 Sep 2021 17:09:51 +0500 usamanadeem321 [off-list ref] wrote:
+ if (dev_info.rx_offload_capa & DEV_RX_OFFLOAD_IPV4_CKSUM)
+ local_port_conf.rxmode.offloads |=
+ DEV_RX_OFFLOAD_IPV4_CKSUM;
+ else {
+ rte_exit(EXIT_FAILURE,
+ "IPV4 Checksum offload not available. (port %u) ",
+ portid);
+ }
+Why not just do it in software if not available. The IPv4 checksum is so cheap many operating systems just always do it in software.