Commit | Line | Data |
---|---|---|
05a14d5e JDB |
1 | #!/bin/bash |
2 | # | |
3 | # Benchmark script: | |
4 | # - developed for benchmarking ingress qdisc path | |
5 | # | |
6 | # Script for injecting packets into RX path of the stack with pktgen | |
7 | # "xmit_mode netif_receive". With an invalid dst_mac this will only | |
8 | # measure the ingress code path as packets gets dropped in ip_rcv(). | |
9 | # | |
10 | # This script don't really need any hardware. It benchmarks software | |
11 | # RX path just after NIC driver level. With bursting is also | |
12 | # "removes" the SKB alloc/free overhead. | |
13 | # | |
14 | # Setup scenarios for measuring ingress qdisc (with invalid dst_mac): | |
15 | # ------------------------------------------------------------------ | |
16 | # (1) no ingress (uses static_key_false(&ingress_needed)) | |
17 | # | |
18 | # (2) ingress on other dev (change ingress_needed and calls | |
19 | # handle_ing() but exit early) | |
20 | # | |
21 | # config: tc qdisc add dev $SOMEDEV handle ffff: ingress | |
22 | # | |
23 | # (3) ingress on this dev, handle_ing() -> tc_classify() | |
24 | # | |
25 | # config: tc qdisc add dev $DEV handle ffff: ingress | |
26 | # | |
27 | # (4) ingress on this dev + drop at u32 classifier/action. | |
28 | # | |
29 | basedir=`dirname $0` | |
30 | source ${basedir}/functions.sh | |
31 | root_check_run_with_sudo "$@" | |
32 | ||
33 | # Parameter parsing via include | |
34 | source ${basedir}/parameters.sh | |
35 | # Using invalid DST_MAC will cause the packets to get dropped in | |
36 | # ip_rcv() which is part of the test | |
37 | [ -z "$DEST_IP" ] && DEST_IP="198.18.0.42" | |
38 | [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" | |
39 | [ -z "$BURST" ] && BURST=1024 | |
40 | ||
41 | # Base Config | |
42 | DELAY="0" # Zero means max speed | |
43 | COUNT="10000000" # Zero means indefinitely | |
44 | ||
45 | # General cleanup everything since last run | |
46 | pg_ctrl "reset" | |
47 | ||
48 | # Threads are specified with parameter -t value in $THREADS | |
49 | for ((thread = 0; thread < $THREADS; thread++)); do | |
50 | # The device name is extended with @name, using thread number to | |
51 | # make then unique, but any name will do. | |
52 | dev=${DEV}@${thread} | |
53 | ||
54 | # Add remove all other devices and add_device $dev to thread | |
55 | pg_thread $thread "rem_device_all" | |
56 | pg_thread $thread "add_device" $dev | |
57 | ||
58 | # Base config of dev | |
59 | pg_set $dev "flag QUEUE_MAP_CPU" | |
60 | pg_set $dev "count $COUNT" | |
61 | pg_set $dev "pkt_size $PKT_SIZE" | |
62 | pg_set $dev "delay $DELAY" | |
63 | pg_set $dev "flag NO_TIMESTAMP" | |
64 | ||
65 | # Destination | |
66 | pg_set $dev "dst_mac $DST_MAC" | |
67 | pg_set $dev "dst $DEST_IP" | |
68 | ||
69 | # Inject packet into RX path of stack | |
70 | pg_set $dev "xmit_mode netif_receive" | |
71 | ||
72 | # Burst allow us to avoid measuring SKB alloc/free overhead | |
73 | pg_set $dev "burst $BURST" | |
74 | done | |
75 | ||
76 | # start_run | |
77 | echo "Running... ctrl^C to stop" >&2 | |
78 | pg_ctrl "start" | |
79 | echo "Done" >&2 | |
80 | ||
81 | # Print results | |
82 | for ((thread = 0; thread < $THREADS; thread++)); do | |
83 | dev=${DEV}@${thread} | |
84 | echo "Device: $dev" | |
85 | cat /proc/net/pktgen/$dev | grep -A2 "Result:" | |
86 | done |