perf test python: Put perf python at start of sys.path

This avoids picking up a system installed version of the perf python module.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20230527055517.2711487-1-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/tests/python-use.c b/tools/perf/tests/python-use.c
index 6b990ee..0ebc22a 100644 (file)
--- a/tools/perf/tests/python-use.c
+++ b/tools/perf/tests/python-use.c
@@ -14,7 +14,7 @@ static int test__python_use(struct test_suite *test __maybe_unused, int subtest
        char *cmd;
        int ret;
 
-       if (asprintf(&cmd, "echo \"import sys ; sys.path.append('%s'); import perf\" | %s %s",
+       if (asprintf(&cmd, "echo \"import sys ; sys.path.insert(0, '%s'); import perf\" | %s %s",
                     PYTHONPATH, PYTHON, verbose > 0 ? "" : "2> /dev/null") < 0)
                return -1;