debugDDe (1158408), страница 7

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<SL | PL | TR> <M> (<P>) [<R>] {<FILE>, <LINE>}= <NONE | MINIMAL | MODIFY | FULL>, (<I0>:<L0>, <R0>, <S0>), (<I1>:<L1>, <R1>, <S1>), …

EL: <M>

END_HEADER

# End trace header

The MODE line specifies the trace level and a mode of empty iterations accumulation. All other records specify the parameters for the each structure and have the same format as records of the trace configuration file.

The following trace information is accumulated during execution result tracing:

• The values of all read variables:

RD: [<variable type>] <variable name> = <value>; {<file name>, <line number>}

• Expression calculation beginning:

BW: [<variable type>] <variable name>; {<file name>, <line number>}

• The values of all variables assigned in:

AW: [<variable type>] <variable name> = <value>; {<file name>, <line number>}

• The values of all read reduction variables:

RV_RD: [<variable type>] <variable name> = <value>; {<file name>, <line number>}

• Beginning of expression calculation of a reduction variable:

RV_BW: [<variable type>] <variable name>; {<file name>, <line number>}

• The values of all reduction variables assigned in:

RV_AW: [<variable type>] <variable name> = <value>; {<file name>, <line number>}

• result of reduction operation:

RV: [<variable type>] <value>; {<file name>, <line number>}

• Completion of self-execution block in he sequential part of a program:

SKP: {<file name>, <line number>}

• Parallel loop beginning:

PL: <structure number> (<parent structure number>) [<structure rank>] ; {<file name>, <line number>}

• Sequential loop beginning:

SL: <structure number> (<parent structure number>) [<structure rank>] ; {<file name>, <line number>}

• Task region beginning:

TR: <structure number> (<parent structure number>) [<region rank (always equals one)>] ; {<file name>, <line number>}

• Iteration beginning:

IT: <absolute iteration index (calculated from all values of all iteration variables)>, (<iteration variable value>,<iteration variable value>,…).

• End of loop or task region execution:

EL: <structure number>; {<file name>, <line number>}

6.5Realization of comparing execution results

6.5.1Base structures of comparing execution results module

The structure of tracing is divided into two parts. The first part represents a hierarchy exposition of program structures. It maps an enclosure of structures, parameters of trace gathering for the each structure and other information. The structures hierarchy and their parameters are read from the trace configuration file when tracing is initialized. If the given file is not specified or its structure is broken, the structure description hierarchy is formed during trace gathering. Note that in the trace-comparing mode, the given file is not read and the structure parameters are taken from the standard trace file.

The array of trace records represents the second part of tracing. This array uses TABLE structure. During trace accumulation, the coherence of trace records and structure hierarchy is supported. When a new event of structure beginning occurs, the pointer to the corresponding structure description is stored with the new trace record. If the structure description is absent, a new structure description with defaults is dynamically created.

The each trace record of the structure beginning keeps trace record numbers of the all iteration or tasks of the structure. The hash-table is used for keeping these numbers.

Figure 4. Trace structure

The subsystem of comparing execution results consists of the following base modules: trace reading module, trace writing module, trace accumulation module, trace comparing module, and reduction processing module. Each of this modules is accessing dependently on parameters and modes of comparing execution results subsystem.

The trace accumulation functions forms records in the trace array. If the mode of direct writing to a file is specified then trace records aren’t created in the memory and are written to a trace-file right away by using trace writing module. In the trace comparing mode the trace reading module uses trace accumulation functions for forming trace in the memory.

The structures of comparing execution results subsystem are shown below.

Program structure description:

The following structures describe the records for different trace types.

The record type of completion self-calculation block in the sequential part of a program:

The record type of program structure beginning:

The record type of program structure completion:

The record type of loop iteration or parallel task beginning:

The record type of variable accessing or reduction results:

The TRACE type describes common trace structure. The system contains only one global variable Trace of this type:

The following functions are intended for work with “comparing execution results” module. These functions use functions of trace writing, reading, accumulation and comparing modules dependently from the current assigned parameters and current trace mode.

The function initializes the structures of comparing execution results module. If the trace comparing mode is selected then the function reads standard trace file and loads it into the memory. If the trace-accumulation mode is selected then the function reads trace configuration file and parameters of program structures.

The function prepares internal structures to begin comparing execution trace with reference trace after reading standard trace from a file.

The function uninitializes structures of comparing execution results module. It frees all allocated memory and forms standard trace file and loop description file if corresponding trace modes are turned on.

The function reads the standard trace file or/and the trace configuration file according to the current trace mode.

The function forms the standard trace file or trace configuration file according to the current trace mode.

Характеристики

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