From 270e3f076b509c24d8cf69dde11db12d64706113 Mon Sep 17 00:00:00 2001
From: Ian Rogers <irogers@google.com>
Date: Mon, 15 Jun 2026 18:15:43 -0700
Subject: perf python: Add LiveSession helper

Add LiveSession class in tools/perf/python/perf_live.py to support
live event collection using perf.evlist and perf.parse_events,
avoiding the need to fork a separate perf record process.

Signed-off-by: Ian Rogers <irogers@google.com>
Assisted-by: Gemini:gemini-3.1-pro-preview
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alice Rogers <alice.mei.rogers@gmail.com>
Cc: Dapeng Mi <dapeng1.mi@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/tests/shell/lib/setup_python.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'tools/perf/tests/shell/lib/setup_python.sh')

diff --git a/tools/perf/tests/shell/lib/setup_python.sh b/tools/perf/tests/shell/lib/setup_python.sh
index a58e5536f2ed..2173215a0517 100644
--- a/tools/perf/tests/shell/lib/setup_python.sh
+++ b/tools/perf/tests/shell/lib/setup_python.sh
@@ -14,3 +14,16 @@ then
   echo Skipping test, python not detected please set environment variable PYTHON.
   exit 2
 fi
+
+# Set PYTHONPATH to find the in-tree built perf.so first, avoiding system-wide perf.so
+if [ -n "$PERF_EXEC_PATH" ] && [ -d "$PERF_EXEC_PATH/python" ]; then
+  PYTHONPATH_DIR="$PERF_EXEC_PATH/python"
+elif [ -d "$(dirname "$0")/../../python" ]; then
+  PYTHONPATH_DIR="$(dirname "$0")/../../python"
+elif [ -d "$(dirname "$0")/../python" ]; then
+  PYTHONPATH_DIR="$(dirname "$0")/../python"
+fi
+
+if [ -n "$PYTHONPATH_DIR" ]; then
+  export PYTHONPATH="$PYTHONPATH_DIR${PYTHONPATH:+:$PYTHONPATH}"
+fi
-- 
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