Re: [PATCH v3 bpf-next 8/9] samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap
From: Jesper Dangaard Brouer <hidden>
Date: 2020-06-24 09:00:53
Also in:
bpf
On Tue, 23 Jun 2020 23:39:33 +0200 Lorenzo Bianconi [off-list ref] wrote:
Extend xdp_redirect_cpu_{usr,kern}.c adding the possibility to load
a XDP program on cpumap entries. The following options have been added:
- mprog-name: cpumap entry program name
- mprog-filename: cpumap entry program filename
- redirect-device: output interface if the cpumap program performs a
XDP_REDIRECT to an egress interface
- redirect-map: bpf map used to perform XDP_REDIRECT to an egress
interface
- mprog-disable: disable loading XDP program on cpumap entries
Add xdp_pass, xdp_drop, xdp_redirect stats accounting
Co-developed-by: Jesper Dangaard Brouer <redacted>
Signed-off-by: Jesper Dangaard Brouer <redacted>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Jesper Dangaard Brouer <redacted>
Example command and output:
sudo ./xdp_redirect_cpu --dev i40e2 --qsize 64 --cpu 2 --prog xdp_cpu_map0 \
--mprog-filename xdp1_kern.o --mprog-name xdp1
Running XDP/eBPF prog_name:xdp_cpu_map0
XDP-cpumap CPU:to pps drop-pps extra-info
XDP-RX 4 17,904,077 0 0
XDP-RX total 17,904,077 0
cpumap-enqueue 4:2 17,904,076 418,122 8.00 bulk-average
cpumap-enqueue sum:2 17,904,076 418,122 8.00 bulk-average
cpumap_kthread 2 17,485,954 0 35,139 sched
cpumap_kthread total 17,485,954 0 35,139 sched-sum
redirect_err total 0 0
xdp_exception total 0 0
2nd remote XDP/eBPF prog_name: xdp1
XDP-cpumap CPU:to xdp-pass xdp-drop xdp-redir
xdp-in-kthread 2 0 17,485,955 0
xdp-in-kthread total 0 17,485,955 0
Another example, where RSS is deliberately setup to only hit CPU-0.
$ sudo ./xdp_redirect_cpu --dev i40e2 --qsize 192 --cpu 2 --cpu 3 --cpu 4 \
--prog xdp_cpu_map5_lb_hash_ip_pairs \
--mprog-name xdp_redirect --redirect-device mlx5p1 --redirect-map tx_port
Running XDP/eBPF prog_name:xdp_cpu_map5_lb_hash_ip_pairs
XDP-cpumap CPU:to pps drop-pps extra-info
XDP-RX 0 10,603,984 0 0
XDP-RX total 10,603,984 0
cpumap-enqueue 0:2 3,539,815 0 6.88 bulk-average
cpumap-enqueue sum:2 3,539,815 0 6.88 bulk-average
cpumap-enqueue 0:3 3,554,091 0 6.88 bulk-average
cpumap-enqueue sum:3 3,554,091 0 6.88 bulk-average
cpumap-enqueue 0:4 3,510,076 84 6.87 bulk-average
cpumap-enqueue sum:4 3,510,076 84 6.87 bulk-average
cpumap_kthread 2 3,539,817 0 91,310 sched
cpumap_kthread 3 3,554,101 0 93,604 sched
cpumap_kthread 4 3,509,991 0 92,893 sched
cpumap_kthread total 10,603,910 0 277,809 sched-sum
redirect_err total 0 0
xdp_exception total 0 0
2nd remote XDP/eBPF prog_name: xdp_redirect
XDP-cpumap CPU:to xdp-pass xdp-drop xdp-redir
xdp-in-kthread 2 0 0 3,539,818
xdp-in-kthread 3 0 0 3,554,101
xdp-in-kthread 4 0 0 3,509,991
xdp-in-kthread total 0 0 10,603,910
More performance test examples can be found here:
https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org
--
Best regards,
Jesper Dangaard Brouer
MSc.CS, Principal Kernel Engineer at Red Hat
LinkedIn: http://www.linkedin.com/in/brouer