32 lines
986 B
Bash
32 lines
986 B
Bash
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#!/bin/sh
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# perf stat --bpf-counters test
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# SPDX-License-Identifier: GPL-2.0
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set -e
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# check whether $2 is within +/- 10% of $1
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compare_number()
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{
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first_num=$1
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second_num=$2
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# upper bound is first_num * 110%
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upper=$(( $first_num + $first_num / 10 ))
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# lower bound is first_num * 90%
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lower=$(( $first_num - $first_num / 10 ))
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if [ $second_num -gt $upper ] || [ $second_num -lt $lower ]; then
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echo "The difference between $first_num and $second_num are greater than 10%."
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exit 1
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fi
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}
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# skip if --bpf-counters is not supported
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perf stat --bpf-counters true > /dev/null 2>&1 || exit 2
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base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
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bpf_cycles=$(perf stat --no-big-num --bpf-counters -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
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compare_number $base_cycles $bpf_cycles
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exit 0
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