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perf tools: Add pipe_test.sh to verify pipe operations

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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>
This commit is contained in:
Namhyung Kim 2021-07-19 15:31:53 -07:00 committed by Arnaldo Carvalho de Melo
parent c3a057dc3a
commit ec02f2b134
1 changed files with 69 additions and 0 deletions
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69
tools/perf/tests/shell/pipe_test.sh Executable file
View file

@ -0,0 +1,69 @@
#!/bin/sh
# perf pipe recording and injection test
# SPDX-License-Identifier: GPL-2.0
# skip if there's no compiler
if ! [ -x "$(command -v cc)" ]; then
echo "failed: no compiler, install gcc"
exit 2
fi
file=$(mktemp /tmp/test.file.XXXXXX)
data=$(mktemp /tmp/perf.data.XXXXXX)
cat <<EOF | cc -o ${file} -x c -
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
volatile int done;
void sigalrm(int sig) {
done = 1;
}
__attribute__((noinline)) void noploop(void) {
while (!done)
continue;
}
int main(int argc, char *argv[]) {
int sec = 1;
if (argc > 1)
sec = atoi(argv[1]);
signal(SIGALRM, sigalrm);
alarm(sec);
noploop();
return 0;
}
EOF
if ! perf record -e task-clock:u -o - ${file} | perf report -i - --task | grep test.file; then
echo "cannot find the test file in the perf report"
exit 1
fi
if ! perf record -e task-clock:u -o - ${file} | perf inject -b | perf report -i - | grep noploop; then
echo "cannot find noploop function in pipe #1"
exit 1
fi
perf record -e task-clock:u -o - ${file} | perf inject -b -o ${data}
if ! perf report -i ${data} | grep noploop; then
echo "cannot find noploop function in pipe #2"
exit 1
fi
perf record -e task-clock:u -o ${data} ${file}
if ! perf inject -b -i ${data} | perf report -i - | grep noploop; then
echo "cannot find noploop function in pipe #3"
exit 1
fi
rm -f ${file} ${data} ${data}.old
exit 0