NativeLib.xml
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Fri, 25 May 2018 18:34:05 +0300
changeset 2168 a66062a205ae
parent 1050 56bef276055e
permissions -rw-r--r--
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.
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://www.plcopen.org/xml/tc6.xsd"
         xsi:schemaLocation="http://www.plcopen.org/xml/tc6.xsd"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:xhtml="http://www.w3.org/1999/xhtml">
  <fileHeader companyName="Unknown"
              productName="Unnamed"
              productVersion="1"
              creationDateTime="2013-01-29T14:01:00"/>
  <contentHeader name="Unnamed"
                 modificationDateTime="2013-02-26T15:59:13">
    <coordinateInfo>
      <fbd>
        <scaling x="0" y="0"/>
      </fbd>
      <ld>
        <scaling x="0" y="0"/>
      </ld>
      <sfc>
        <scaling x="0" y="0"/>
      </sfc>
    </coordinateInfo>
  </contentHeader>
  <types>
    <dataTypes>
      <dataType name="LOGLEVEL">
        <baseType>
          <enum>
            <values>
              <value name="CRITICAL"/>
              <value name="WARNING"/>
              <value name="INFO"/>
              <value name="DEBUG"/>
            </values>
          </enum>
        </baseType>
        <initialValue>
          <simpleValue value="INFO"/>
        </initialValue>
      </dataType>
    </dataTypes>
    <pous>
      <pou name="LOGGER" pouType="functionBlock">
        <interface>
          <inputVars>
            <variable name="TRIG">
              <type>
                <BOOL/>
              </type>
            </variable>
            <variable name="MSG">
              <type>
                <string/>
              </type>
            </variable>
            <variable name="LEVEL">
              <type>
                <derived name="LOGLEVEL"/>
              </type>
              <initialValue>
                <simpleValue value="INFO"/>
              </initialValue>
            </variable>
          </inputVars>
          <localVars>
            <variable name="TRIG0">
              <type>
                <BOOL/>
              </type>
            </variable>
          </localVars>
        </interface>
        <body>
          <ST>
<![CDATA[IF TRIG AND NOT TRIG0 THEN
{{
 LogMessage(GetFbVar(LEVEL),(char*)GetFbVar(MSG, .body),GetFbVar(MSG, .len));
}}
END_IF;
TRIG0:=TRIG;
]]>
          </ST>
        </body>
      </pou>
    </pous>
  </types>
  <instances>
    <configurations/>
  </instances>
</project>