Linux runtime: overrun detection for real-time timers and for plc execution.
If real-time timer wakes-up PLC thread too late (10% over period), then
warning is logged.
If PLC code (IO retreive, execution, IO publish) takes longer than requested
PLC execution cycle, then warning is logged, and CPU hoogging is mitigated
by delaying next PLC execution a few cylces more until having at least
1ms minimal idle time.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz.
# See COPYING file for copyrights details.
from __future__ import absolute_import
from plcopen.XSLTModelQuery import XSLTModelQuery, _StringValue, _BoolValue, _translate_args
# -------------------------------------------------------------------------------
# Helpers object for generating pou var list
# -------------------------------------------------------------------------------
class _VariableInfos(object):
__slots__ = ["Name", "Class", "Option", "Location", "InitialValue",
"Edit", "Documentation", "Type", "Tree", "Number"]
def __init__(self, *args):
for attr, value in zip(self.__slots__, args):
setattr(self, attr, value if value is not None else "")
def copy(self):
return _VariableInfos(*[getattr(self, attr) for attr in self.__slots__])
class VariablesInfosFactory(object):
""" Helpers object for generating pou var list """
def __init__(self, variables):
self.Variables = variables
self.TreeStack = []
self.Type = None
self.Dimensions = None
def SetType(self, context, *args):
self.Type = args[0][0]
def GetType(self):
if len(self.Dimensions) > 0:
return ("array", self.Type, self.Dimensions)
return self.Type
def GetTree(self):
return (self.TreeStack.pop(-1), self.Dimensions)
def AddDimension(self, context, *args):
self.Dimensions.append(tuple(
_translate_args([_StringValue] * 2, args)))
def AddTree(self, context, *args):
self.TreeStack.append([])
self.Dimensions = []
def AddVarToTree(self, context, *args):
var = (args[0][0], self.Type, self.GetTree())
self.TreeStack[-1].append(var)
def AddVariable(self, context, *args):
self.Variables.append(_VariableInfos(*(
_translate_args([_StringValue] * 5 + [_BoolValue] + [_StringValue], args) +
[self.GetType(), self.GetTree()])))
class VariableInfoCollector(XSLTModelQuery):
def __init__(self, controller):
XSLTModelQuery.__init__(self,
controller,
"variables_infos.xslt",
[(name, self.FactoryCaller(name))
for name in [
"SetType",
"AddDimension",
"AddTree",
"AddVarToTree",
"AddVariable"]])
def FactoryCaller(self, funcname):
def CallFactory(*args):
return getattr(self.factory, funcname)(*args)
return CallFactory
def Collect(self, root, debug, variables, tree):
self.factory = VariablesInfosFactory(variables)
self._process_xslt(root, debug, tree=str(tree))
res = self.factory
self.factory = None
return res