ec02f2b134
It builds a test program and use it to verify pipe behavior with perf
record, inject and report.
$ perf test pipe -v
80: perf pipe recording and injection test :
--- start ---
test child forked, pid 1109301
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
1109315 1109315 -1 |test.file.MGNff
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
99.99% test.file.MGNff test.file.MGNffM [.] noploop
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
99.99% test.file.MGNff test.file.MGNffM [.] noploop
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.153 MB /tmp/perf.data.dmsnlx (3995 samples) ]
99.99% test.file.MGNff test.file.MGNffM [.] noploop
test child finished with 0
---- end ----
perf pipe recording and injection test: Ok
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210719223153.1618812-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
69 lines
1.4 KiB
Bash
Executable file
69 lines
1.4 KiB
Bash
Executable file
#!/bin/sh
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# perf pipe recording and injection test
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# SPDX-License-Identifier: GPL-2.0
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# skip if there's no compiler
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if ! [ -x "$(command -v cc)" ]; then
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echo "failed: no compiler, install gcc"
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exit 2
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fi
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file=$(mktemp /tmp/test.file.XXXXXX)
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data=$(mktemp /tmp/perf.data.XXXXXX)
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cat <<EOF | cc -o ${file} -x c -
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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volatile int done;
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void sigalrm(int sig) {
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done = 1;
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}
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__attribute__((noinline)) void noploop(void) {
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while (!done)
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continue;
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}
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int main(int argc, char *argv[]) {
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int sec = 1;
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if (argc > 1)
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sec = atoi(argv[1]);
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signal(SIGALRM, sigalrm);
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alarm(sec);
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noploop();
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return 0;
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}
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EOF
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if ! perf record -e task-clock:u -o - ${file} | perf report -i - --task | grep test.file; then
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echo "cannot find the test file in the perf report"
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exit 1
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fi
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if ! perf record -e task-clock:u -o - ${file} | perf inject -b | perf report -i - | grep noploop; then
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echo "cannot find noploop function in pipe #1"
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exit 1
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fi
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perf record -e task-clock:u -o - ${file} | perf inject -b -o ${data}
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if ! perf report -i ${data} | grep noploop; then
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echo "cannot find noploop function in pipe #2"
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exit 1
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fi
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perf record -e task-clock:u -o ${data} ${file}
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if ! perf inject -b -i ${data} | perf report -i - | grep noploop; then
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echo "cannot find noploop function in pipe #3"
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exit 1
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fi
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rm -f ${file} ${data} ${data}.old
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exit 0
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