beremiz

Build by default with optimization level -O2 for GCC

2018-05-25, Andrey Skvortsov
a66062a205ae
Build by default with optimization level -O2 for GCC

before -O0 was used by default, that caused pretty bad performance.

Amd64, i6700k, 4200MHz, GNU/Linux (non-RT kernel), gcc 7.2.0

-------------------------------------
Optimization | EN/ENO |no EN/ENO |
-------------------------------------
default | 11 | 9.5 |
-O3 | 3.9 | 5.2 |
-O2 | 4 | 4.8 |
-Os | 4.1 | 3.5 |
-Ofast | 3.9 | 5.2 |
-------------------------------------

ARM, BBB Cortex-A8, 600Mhz, GNU/Linux, gcc 4.6.3

-------------------------------------
Optimization | EN/ENO |no EN/ENO |
-------------------------------------
default | 273 | 226 |
-O3 | 141.8 | 106.2 |
-O2 | 142 | 107 |
-Os | 152.5 | 112.2 |
-Ofast | 141.7 | 106.2 |
-------------------------------------

For embedded systems with size constaints (like Cortex-Mx, AVR and so
on) I usually use -Os. It gets pretty good results. For
GNU/Linux-based systems -O2 is usually a good choice, as you see the
test results.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz, a Integrated Development Environment for
# programming IEC 61131-3 automates supporting plcopen standard and CanFestival.
#
# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
# See COPYING file for copyrights details.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
"""
Misc definitions
"""
from __future__ import absolute_import
import os
from util.BitmapLibrary import AddBitmapFolder
from util.TranslationCatalogs import AddCatalog
def CheckPathPerm(path):
""" Helper func to check path write permission """
if path is None or not os.path.isdir(path):
return False
for root, dirs, files in os.walk(path):
files = [f for f in files if not f[0] == '.']
dirs[:] = [d for d in dirs if not d[0] == '.']
for name in files:
if os.access(root, os.W_OK) is not True or os.access(os.path.join(root, name), os.W_OK) is not True:
return False
return True
def GetClassImporter(param):
"""
is used to resolve library class names in features.py
if param is a string, returns a callable that return the class pointed by param
if a class is given, then returns a callable that returns the given class.
"""
if isinstance(param, str):
def factory():
# on-demand import, only when using class
mod = __import__(param.rsplit('.', 1)[0])
return reduce(getattr, param.split('.')[1:], mod)
return factory
else:
return lambda: param
def InstallLocalRessources(CWD):
# Beremiz bitmaps
AddBitmapFolder(os.path.join(CWD, "images"))
# Internationalization
AddCatalog(os.path.join(CWD, "locale"))