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This test case often fails on s390 (about 2 out of 10) because the 10% percent limit on the difference between --bpf-counters event counting and s390 hardware counting is more than 10% in all failure cases. Raise the limit to 20% on s390 and the test case succeeds. Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: gor@linux.ibm.com Cc: hca@linux.ibm.com Cc: sumanthk@linux.ibm.com Cc: svens@linux.ibm.com Link: https://lore.kernel.org/r/20240108084009.3959211-1-tmricht@linux.ibm.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
46 lines
1.3 KiB
Bash
Executable File
46 lines
1.3 KiB
Bash
Executable File
#!/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 +/- 20% 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=$2
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# upper bound is first_num * 120%
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upper=$(expr $first_num + $first_num / 5 )
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# lower bound is first_num * 80%
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lower=$(expr $first_num - $first_num / 5 )
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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 20%."
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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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if ! perf stat -e cycles --bpf-counters true > /dev/null 2>&1; then
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if [ "$1" = "-v" ]; then
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echo "Skipping: --bpf-counters not supported"
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perf --no-pager stat -e cycles --bpf-counters true || true
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fi
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exit 2
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fi
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base_cycles=$(perf stat --no-big-num -e cycles -- perf bench sched messaging -g 1 -l 100 -t 2>&1 | awk '/cycles/ {print $1}')
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if [ "$base_cycles" = "<not" ]; then
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echo "Skipping: cycles event not counted"
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exit 2
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fi
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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 $1}')
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if [ "$bpf_cycles" = "<not" ]; then
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echo "Failed: cycles not counted with --bpf-counters"
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exit 1
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fi
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compare_number $base_cycles $bpf_cycles
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exit 0
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