feat(profiler): add launch script for profiler

GitOrigin-RevId: fdfb60b1493fab8300e4e84afd383923f0f081f3

imperative/python/megengine/tools/profiler.py

+import argparse
+import getopt
+import os
+import runpy
+import sys
+
+from megengine.logger import get_logger
+from megengine.utils.profiler import Profiler, merge_trace_events
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        prog="megengine.tools.profiler", description="Profiling megengine program"
+    )
+    parser.add_argument(
+        "-m", "--module", action="store_true", help="whether launch program as module"
+    )
+    parser.add_argument("-o", "--output", type=str, help="output file location")
+    parser.add_argument(
+        "-f",
+        "--format",
+        action="append",
+        type=str,
+        help="output file format",
+        choices=Profiler.valid_formats,
+    )
+    parser.add_argument(
+        "--merge_trace_events", action="store_true",
+    )
+    parser.add_argument(
+        "--clean", action="store_true",
+    )
+    for opt in Profiler.valid_options:
+        parser.add_argument("--" + opt, type=int, default=None)
+    args, extras = parser.parse_known_args(sys.argv[1:])
+    prof_args = {}
+    for opt in Profiler.valid_options:
+        optval = getattr(args, opt, None)
+        if optval is not None:
+            prof_args[opt] = optval
+
+    if args.output is not None:
+        prof_args["path"] = args.output
+
+    if args.format:
+        prof_args["formats"] = args.format
+
+    if args.clean:
+        for file in os.listdir(profiler.directory):
+            os.remove(os.path.join(profiler.directory, file))
+
+    if len(extras) == 0:
+        if not args.merge_trace_events:
+            parser.print_usage()
+            exit(1)
+    else:
+        filename = extras[0]
+        if not args.module:
+            if not os.path.exists(filename):
+                get_logger().fatal("cannot find file {}".format(filename))
+                exit(1)
+            filename = os.path.realpath(filename)
+            # Replace profiler's dir with script's dir in front of module search path.
+            sys.path[0] = os.path.dirname(filename)
+
+        sys.argv[:] = [filename, *extras[1:]]
+
+        profiler = Profiler(**prof_args)
+        with profiler:
+            if args.module:
+                runpy.run_module(filename)
+            else:
+                run_script(filename)
+        profiler.dump()
+
+    if args.merge_trace_events:
+        merge_trace_events(profiler.directory)
+
+
+def run_module(modulename):
+    runpy.run_module(modulename, None, "__main__", True)
+
+
+def run_script(filename):
+    runpy.run_path(filename, None, "__main__")
+
+
+if __name__ == "__main__":
+    main()