tools/testing/selftests/bpf/benchs/run_bench_ringbufs.sh

   1 #!/bin/bash
   2
   3 set -eufo pipefail
   4
   5 RUN_BENCH="sudo ./bench -w3 -d10 -a"
   6
   7 function hits()
   8 {
   9         echo "$*" | sed -E "s/.*hits\s+([0-9]+\.[0-9]+ ± [0-9]+\.[0-9]+M\/s).*/\1/"
  10 }
  11
  12 function drops()
  13 {
  14         echo "$*" | sed -E "s/.*drops\s+([0-9]+\.[0-9]+ ± [0-9]+\.[0-9]+M\/s).*/\1/"
  15 }
  16
  17 function 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
  26 function 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
  33 header "Single-producer, parallel producer"
  34 for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
  35         summarize $b "$($RUN_BENCH $b)"
  36 done
  37
  38 header "Single-producer, parallel producer, sampled notification"
  39 for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
  40         summarize $b "$($RUN_BENCH --rb-sampled $b)"
  41 done
  42
  43 header "Single-producer, back-to-back mode"
  44 for 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 $b)"
  47 done
  48
  49 header "Ringbuf back-to-back, effect of sample rate"
  50 for b in 1 5 10 25 50 100 250 500 1000 2000 3000; do
  51         summarize "rb-sampled-$b" "$($RUN_BENCH --rb-b2b --rb-batch-cnt $b --rb-sampled --rb-sample-rate $b rb-custom)"
  52 done
  53 header "Perfbuf back-to-back, effect of sample rate"
  54 for b in 1 5 10 25 50 100 250 500 1000 2000 3000; do
  55         summarize "pb-sampled-$b" "$($RUN_BENCH --rb-b2b --rb-batch-cnt $b --rb-sampled --rb-sample-rate $b pb-custom)"
  56 done
  57
  58 header "Ringbuf back-to-back, reserve+commit vs output"
  59 summarize "reserve" "$($RUN_BENCH --rb-b2b                 rb-custom)"
  60 summarize "output"  "$($RUN_BENCH --rb-b2b --rb-use-output rb-custom)"
  61
  62 header "Ringbuf sampled, reserve+commit vs output"
  63 summarize "reserve-sampled" "$($RUN_BENCH --rb-sampled                 rb-custom)"
  64 summarize "output-sampled"  "$($RUN_BENCH --rb-sampled --rb-use-output rb-custom)"
  65
  66 header "Single-producer, consumer/producer competing on the same CPU, low batch count"
  67 for 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)"
  69 done
  70
  71 header "Ringbuf, multi-producer contention"
  72 for 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)"
  74 done
  75