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e1c19cd376
The trace summary test calls /bin/true and filters for open, read and
close events. These events are coming from shared library loads.
On a musl system, the loader and libc may point to the same file. true
needs only libc, no further shared libraries are loaded at startup. The
test fails since no open, read and close events are captured.
root@host:~# ldd /bin/true
/lib/ld-musl-riscv64.so.1 (0x3fb8882000)
libc.so => /lib/ld-musl-riscv64.so.1 (0x3fb8882000)
root@host:~# file /lib/ld-musl-riscv64.so.1
/lib/ld-musl-riscv64.so.1: symbolic link to /usr/lib/libc.so
root@host:~# strace -f /bin/true
execve("/bin/true", ["/bin/true", ...], ... /* 18 vars */) = 1
set_tid_address(0x3fa1f7bf70) = 330
mprotect(0x2ad6b8e000, 12288, PROT_READ) = 0
exit_group(0) = ?
+++ exited with 0 +++
Run "cat /dev/null" instead of "true". This creates the required events
regardless of the C library and it works for cat from busybox or from
coreutils.
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Acked-by: Ian Rogers <irogers@google.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
78 lines
2.1 KiB
Bash
Executable File
78 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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# perf trace summary (exclusive)
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# SPDX-License-Identifier: GPL-2.0
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# Check that perf trace works with various summary mode
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# shellcheck source=lib/probe.sh
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. "$(dirname $0)"/lib/probe.sh
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skip_if_no_perf_trace || exit 2
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[ "$(id -u)" = 0 ] || exit 2
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OUTPUT=$(mktemp /tmp/perf_trace_test.XXXXX)
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test_perf_trace() {
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args=$1
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workload="cat /dev/null"
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search="^\s*(open|read|close).*[0-9]+%$"
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echo "testing: perf trace ${args} -- ${workload}"
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perf trace ${args} -- ${workload} >${OUTPUT} 2>&1
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if [ $? -ne 0 ]; then
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echo "Error: perf trace ${args} failed unexpectedly"
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cat ${OUTPUT}
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rm -f ${OUTPUT}
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exit 1
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fi
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count=$(grep -E -c -m 3 "${search}" ${OUTPUT})
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if [ "${count}" != "3" ]; then
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echo "Error: cannot find enough pattern ${search} in the output"
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cat ${OUTPUT}
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rm -f ${OUTPUT}
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exit 1
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fi
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}
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# summary only for a process
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test_perf_trace "-s"
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# normal output with summary at the end
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test_perf_trace "-S"
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# summary only with an explicit summary mode
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test_perf_trace "-s --summary-mode=thread"
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# summary with normal output - total summary mode
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test_perf_trace "-S --summary-mode=total"
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# summary only for system wide - per-thread summary
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test_perf_trace "-as --summary-mode=thread --no-bpf-summary"
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# summary only for system wide - total summary mode
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test_perf_trace "-as --summary-mode=total --no-bpf-summary"
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if ! perf check feature -q bpf; then
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echo "Skip --bpf-summary tests as perf built without libbpf"
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rm -f ${OUTPUT}
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exit 2
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fi
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# summary only for system wide - per-thread summary with BPF
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test_perf_trace "-as --summary-mode=thread --bpf-summary"
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# summary only for system wide - total summary mode with BPF
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test_perf_trace "-as --summary-mode=total --bpf-summary"
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# summary with normal output for system wide - total summary mode with BPF
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test_perf_trace "-aS --summary-mode=total --bpf-summary"
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# summary only for system wide - cgroup summary mode with BPF
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test_perf_trace "-as --summary-mode=cgroup --bpf-summary"
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# summary with normal output for system wide - cgroup summary mode with BPF
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test_perf_trace "-aS --summary-mode=cgroup --bpf-summary"
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rm -f ${OUTPUT}
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