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

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/benchs/run_bench_ringbufs.sh

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/benchs/run_bench_ringbufs.sh
Extension
.sh
Size
2405 bytes
Lines
61
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: tools
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#!/bin/bash

source ./benchs/run_common.sh

set -eufo pipefail

RUN_RB_BENCH="$RUN_BENCH -c1"

header "Single-producer, parallel producer"
for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
	summarize $b "$($RUN_RB_BENCH $b)"
done

header "Single-producer, parallel producer, sampled notification"
for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
	summarize $b "$($RUN_RB_BENCH --rb-sampled $b)"
done

header "Single-producer, back-to-back mode"
for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
	summarize $b "$($RUN_RB_BENCH --rb-b2b $b)"
	summarize $b-sampled "$($RUN_RB_BENCH --rb-sampled --rb-b2b $b)"
done

header "Ringbuf back-to-back, effect of sample rate"
for b in 1 5 10 25 50 100 250 500 1000 2000 3000; do
	summarize "rb-sampled-$b" "$($RUN_RB_BENCH --rb-b2b --rb-batch-cnt $b --rb-sampled --rb-sample-rate $b rb-custom)"
done
header "Perfbuf back-to-back, effect of sample rate"
for b in 1 5 10 25 50 100 250 500 1000 2000 3000; do
	summarize "pb-sampled-$b" "$($RUN_RB_BENCH --rb-b2b --rb-batch-cnt $b --rb-sampled --rb-sample-rate $b pb-custom)"
done

header "Ringbuf back-to-back, reserve+commit vs output"
summarize "reserve" "$($RUN_RB_BENCH --rb-b2b                 rb-custom)"
summarize "output"  "$($RUN_RB_BENCH --rb-b2b --rb-use-output rb-custom)"

header "Ringbuf sampled, reserve+commit vs output"
summarize "reserve-sampled" "$($RUN_RB_BENCH --rb-sampled                 rb-custom)"
summarize "output-sampled"  "$($RUN_RB_BENCH --rb-sampled --rb-use-output rb-custom)"

header "Single-producer, consumer/producer competing on the same CPU, low batch count"
for b in rb-libbpf rb-custom pb-libbpf pb-custom; do
	summarize $b "$($RUN_RB_BENCH --rb-batch-cnt 1 --rb-sample-rate 1 --prod-affinity 0 --cons-affinity 0 $b)"
done

header "Ringbuf, multi-producer contention"
for b in 1 2 3 4 8 12 16 20 24 28 32 36 40 44 48 52; do
	summarize "rb-libbpf nr_prod $b" "$($RUN_RB_BENCH -p$b --rb-batch-cnt 50 rb-libbpf)"
done

header "Perfbuf, multi-producer"
for b in 1 2 3 4 8 12 16 20 24 28 32 36 40 44 48 52; do
	summarize "pb-libbpf nr_prod $b" "$($RUN_RB_BENCH -p$b --rb-batch-cnt 50 --rb-sample-rate 50 pb-libbpf)"
done

header "Ringbuf, multi-producer contention in overwrite mode, no consumer"
for b in 1 2 3 4 8 12 16 20 24 28 32 36 40 44 48 52; do
	summarize "rb-prod nr_prod $b" "$($RUN_BENCH -p$b --rb-batch-cnt 50 --rb-overwrite --rb-bench-producer rb-libbpf)"
done

Annotation

Implementation Notes