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1d73ba16 | 1 | #!/bin/bash |
b2441318 | 2 | # SPDX-License-Identifier: GPL-2.0 |
1d73ba16 JDB |
3 | # |
4 | # Script for max single flow performance | |
5 | # - If correctly tuned[1], single CPU 10G wirespeed small pkts is possible[2] | |
6 | # | |
7 | # Using pktgen "burst" option (use -b $N) | |
8 | # - To boost max performance | |
9 | # - Avail since: kernel v3.18 | |
10 | # * commit 38b2cf2982dc73 ("net: pktgen: packet bursting via skb->xmit_more") | |
11 | # - This avoids writing the HW tailptr on every driver xmit | |
12 | # - The performance boost is impressive, see commit and blog [2] | |
13 | # | |
14 | # Notice: On purpose generates a single (UDP) flow towards target, | |
15 | # reason behind this is to only overload/activate a single CPU on | |
16 | # target host. And no randomness for pktgen also makes it faster. | |
17 | # | |
18 | # Tuning see: | |
19 | # [1] http://netoptimizer.blogspot.dk/2014/06/pktgen-for-network-overload-testing.html | |
20 | # [2] http://netoptimizer.blogspot.dk/2014/10/unlocked-10gbps-tx-wirespeed-smallest.html | |
21 | # | |
22 | basedir=`dirname $0` | |
23 | source ${basedir}/functions.sh | |
24 | root_check_run_with_sudo "$@" | |
25 | ||
26 | # Parameter parsing via include | |
27 | source ${basedir}/parameters.sh | |
28 | # Set some default params, if they didn't get set | |
0f06a678 MKL |
29 | if [ -z "$DEST_IP" ]; then |
30 | [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1" | |
31 | fi | |
1d73ba16 JDB |
32 | [ -z "$DST_MAC" ] && DST_MAC="90:e2:ba:ff:ff:ff" |
33 | [ -z "$BURST" ] && BURST=32 | |
9efc44d7 | 34 | [ -z "$CLONE_SKB" ] && CLONE_SKB="0" # No need for clones when bursting |
69137ea6 | 35 | [ -z "$COUNT" ] && COUNT="0" # Zero means indefinitely |
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36 | |
37 | # Base Config | |
38 | DELAY="0" # Zero means max speed | |
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39 | |
40 | # General cleanup everything since last run | |
41 | pg_ctrl "reset" | |
42 | ||
43 | # Threads are specified with parameter -t value in $THREADS | |
e0e16672 | 44 | for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do |
1d73ba16 JDB |
45 | dev=${DEV}@${thread} |
46 | ||
47 | # Add remove all other devices and add_device $dev to thread | |
48 | pg_thread $thread "rem_device_all" | |
49 | pg_thread $thread "add_device" $dev | |
50 | ||
51 | # Base config | |
52 | pg_set $dev "flag QUEUE_MAP_CPU" | |
53 | pg_set $dev "count $COUNT" | |
54 | pg_set $dev "clone_skb $CLONE_SKB" | |
55 | pg_set $dev "pkt_size $PKT_SIZE" | |
56 | pg_set $dev "delay $DELAY" | |
57 | pg_set $dev "flag NO_TIMESTAMP" | |
58 | ||
59 | # Destination | |
60 | pg_set $dev "dst_mac $DST_MAC" | |
0f06a678 | 61 | pg_set $dev "dst$IP6 $DEST_IP" |
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62 | |
63 | # Setup burst, for easy testing -b 0 disable bursting | |
64 | # (internally in pktgen default and minimum burst=1) | |
65 | if [[ ${BURST} -ne 0 ]]; then | |
66 | pg_set $dev "burst $BURST" | |
67 | else | |
68 | info "$dev: Not using burst" | |
69 | fi | |
70 | done | |
71 | ||
72 | # Run if user hits control-c | |
73 | function control_c() { | |
74 | # Print results | |
e0e16672 | 75 | for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do |
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76 | dev=${DEV}@${thread} |
77 | echo "Device: $dev" | |
78 | cat /proc/net/pktgen/$dev | grep -A2 "Result:" | |
79 | done | |
80 | } | |
81 | # trap keyboard interrupt (Ctrl-C) | |
82 | trap control_c SIGINT | |
83 | ||
84 | echo "Running... ctrl^C to stop" >&2 | |
85 | pg_ctrl "start" |