xref: /linux/tools/testing/selftests/bpf/benchs/run_bench_ringbufs.sh (revision 547f574fd9d5e3925d47fd44decbf6ab6df94b0e) 
1#!/bin/bash
2
3set -eufo pipefail
4
5RUN_BENCH="sudo ./bench -w3 -d10 -a"
6
7function hits()
8{
9	echo "$*" | sed -E "s/.*hits\s+([0-9]+\.[0-9]+ ± [0-9]+\.[0-9]+M\/s).*/\1/"
10}
11
12function drops()
13{
14	echo "$*" | sed -E "s/.*drops\s+([0-9]+\.[0-9]+ ± [0-9]+\.[0-9]+M\/s).*/\1/"
15}
16
17function header()
18{
19	local len=${#1}
20
21	printf "\n%s\n" "$1"
22	for i in $(seq 1 $len); do printf '='; done
23	printf '\n'
24}
25
26function summarize()
27{
28	bench="$1"
29	summary=$(echo $2 | tail -n1)
30	printf "%-20s %s (drops %s)\n" "$bench" "$(hits $summary)" "$(drops $summary)"
31}
32
33header "Single-producer, parallel producer"
34for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
35	summarize $b "$($RUN_BENCH $b)"
36done
37
38header "Single-producer, parallel producer, sampled notification"
39for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
40	summarize $b "$($RUN_BENCH --rb-sampled $b)"
41done
42
43header "Single-producer, back-to-back mode"
44for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
45	summarize $b "$($RUN_BENCH --rb-b2b $b)"
46	summarize $b-sampled "$($RUN_BENCH --rb-sampled --rb-b2b $b)"
47done
48
49header "Ringbuf back-to-back, effect of sample rate"
50for b in 1 5 10 25 50 100 250 500 1000 2000 3000; do
51	summarize "rb-sampled-$b" "$($RUN_BENCH --rb-b2b --rb-batch-cnt $b --rb-sampled --rb-sample-rate $b rb-custom)"
52done
53header "Perfbuf back-to-back, effect of sample rate"
54for b in 1 5 10 25 50 100 250 500 1000 2000 3000; do
55	summarize "pb-sampled-$b" "$($RUN_BENCH --rb-b2b --rb-batch-cnt $b --rb-sampled --rb-sample-rate $b pb-custom)"
56done
57
58header "Ringbuf back-to-back, reserve+commit vs output"
59summarize "reserve" "$($RUN_BENCH --rb-b2b                 rb-custom)"
60summarize "output"  "$($RUN_BENCH --rb-b2b --rb-use-output rb-custom)"
61
62header "Ringbuf sampled, reserve+commit vs output"
63summarize "reserve-sampled" "$($RUN_BENCH --rb-sampled                 rb-custom)"
64summarize "output-sampled"  "$($RUN_BENCH --rb-sampled --rb-use-output rb-custom)"
65
66header "Single-producer, consumer/producer competing on the same CPU, low batch count"
67for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
68	summarize $b "$($RUN_BENCH --rb-batch-cnt 1 --rb-sample-rate 1 --prod-affinity 0 --cons-affinity 0 $b)"
69done
70
71header "Ringbuf, multi-producer contention"
72for b in 1 2 3 4 8 12 16 20 24 28 32 36 40 44 48 52; do
73	summarize "rb-libbpf nr_prod $b" "$($RUN_BENCH -p$b --rb-batch-cnt 50 rb-libbpf)"
74done
75
76