From 12d988a668651e1cae570f1be83ae4f3bdb7120c Mon Sep 17 00:00:00 2001

From: Nirbheek Chauhan <nirbheek@centricular.com>

Date: Wed, 25 Apr 2018 00:02:44 +0530

Subject: [PATCH 03/16] New argument: --profile-self for profiling performance

Outputs two profile logs: one for the interpreter run and another for

the backend-specific build file generation. Both are stored in

meson-private in the build directory.

---

 mesonbuild/mesonmain.py | 19 ++++++++++++++++---

 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/mesonbuild/mesonmain.py b/mesonbuild/mesonmain.py

index 613e953d..f4fec95a 100644

--- a/mesonbuild/mesonmain.py

+++ b/mesonbuild/mesonmain.py

@@ -15,10 +15,12 @@

 import sys, stat, traceback, argparse

 import datetime

 import os.path

+import platform

+import cProfile as profile

+

 from . import environment, interpreter, mesonlib

 from . import build

 from . import mconf, mintro, mtest, rewriter, minit

-import platform

 from . import mlog, coredata

 from .mesonlib import MesonException

 from .wrap import WrapMode, wraptool

@@ -38,6 +40,8 @@ def create_parser():

     p.add_argument('--wrap-mode', default=WrapMode.default,

                    type=wrapmodetype, choices=WrapMode,

                    help='Special wrap mode to use')

+    p.add_argument('--profile-self', action='store_true', dest='profile',

+                   help=argparse.SUPPRESS)

     p.add_argument('directories', nargs='*')

     return p

@@ -176,7 +180,11 @@ class MesonApp:

             mlog.log('Target machine cpu:', mlog.bold(intr.builtin['target_machine'].cpu_method([], {})))

         mlog.log('Build machine cpu family:', mlog.bold(intr.builtin['build_machine'].cpu_family_method([], {})))

         mlog.log('Build machine cpu:', mlog.bold(intr.builtin['build_machine'].cpu_method([], {})))

-        intr.run()

+        if self.options.profile:

+            fname = os.path.join(self.build_dir, 'meson-private', 'profile-interpreter.log')

+            profile.runctx('intr.run()', globals(), locals(), filename=fname)

+        else:

+            intr.run()

         try:

             dumpfile = os.path.join(env.get_scratch_dir(), 'build.dat')

             # We would like to write coredata as late as possible since we use the existence of

@@ -186,7 +194,12 @@ class MesonApp:

             # sync with the time that gets applied to any files. Thus, we dump this file as late as

             # possible, but before build files, and if any error occurs, delete it.

             cdf = env.dump_coredata()

-            g.generate(intr)

+            if self.options.profile:

+                fname = 'profile-{}-backend.log'.format(self.options.backend)

+                fname = os.path.join(self.build_dir, 'meson-private', fname)

+                profile.runctx('g.generate(intr)', globals(), locals(), filename=fname)

+            else:

+                g.generate(intr)

             build.save(b, dumpfile)

             # Post-conf scripts must be run after writing coredata or else introspection fails.

             g.run_postconf_scripts()

-- 

2.17.0