diff options
Diffstat (limited to 'host/docs/dpdk.dox')
| -rw-r--r-- | host/docs/dpdk.dox | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/host/docs/dpdk.dox b/host/docs/dpdk.dox index 539a6ce18..0b86c78ba 100644 --- a/host/docs/dpdk.dox +++ b/host/docs/dpdk.dox @@ -142,6 +142,9 @@ options: dpdk_driver=/usr/local/lib/x86_64-linux-gnu/dpdk/pmds-21.0/ ;dpdk_corelist is the -l flag for the DPDK EAL. See more at the link ; https://doc.dpdk.org/guides-21.11/linux_gsg/build_sample_apps.html#running-a-sample-application + ;Note if you use multiple SFP ports in a streaming application simultaneously, + ;you can specify multiple cores in the core list (e.g. 0, 1, 2) and then assign + ;them each to the separate SFP port/NIC. dpdk_corelist=0,1 ;dpdk_num_mbufs is the total number of packet buffers allocated ;to each direction's packet buffer pool @@ -161,9 +164,11 @@ case, and octets must be separated by colons. Here is an example: [dpdk_mac=3c:fd:fe:a2:a9:09] ;dpdk_lcore selects the lcore that this NIC's driver will run on ;Multiple NICs may occupy one lcore, but the I/O thread will completely - ;consume that lcore's CPU. Also, 0 is reserved for the master thread (i.e. - ;the initial UHD thread that calls init() for DPDK). Attempting to - ;use it as an I/O thread will only result in hanging. + ;consume that lcore's CPU. When using dual SFP configuration, using a + ;different dpdk_lcore value for each SFP connection is recommended and + ;will result in better streaming performance. Also, 0 is reserved for + ;the master thread (i.e.the initial UHD thread that calls init() for DPDK). + ;Attempting to use it as an I/O thread will only result in hanging. ;Note also that by default, the lcore ID will be the same as the CPU ID. dpdk_lcore = 1 ;dpdk_ipv4 specifies the IPv4 address, and both the address and @@ -176,6 +181,8 @@ case, and octets must be separated by colons. Here is an example: dpdk_num_desc=4096 [dpdk_mac=3c:fd:fe:a2:a9:0a] + ;Using a separate dpdk_lcore value for each SFP connection/MAC entry + ;can possibly result in improved streaming performance. E.g. dpdk_lcore = 2. dpdk_lcore = 1 dpdk_ipv4 = 192.168.20.1/24 |