For programs optimized with the Natural Optimizer Compiler, certain statements can be directly converted into machine code when cataloged. As a result, when executing the optimized objects with Natural at runtime, the performance can be improved considerably.
The NOCSTAT command
analyses cataloged objects and provides statistical information to help decide
whether program statements benefit from optimization with the Natural Optimizer
Compiler and, if so, to what extent they can be optimized.
If a program is cataloged (STOW,
CATALL), the Natural compiler generates an internal
(pseudo) object code based on the statements in the source program. In most
cases, one source statement is transformed into one pseudo-code instruction.
However, for complex statements, such as FOR and
REPEAT, several pseudo-code instructions are generated. The
NOCSTAT analyses are based on the generated
pseudo-code instructions. Therefore, the number of statements indicated in the
statistical reports may exceed the number of statements in the source
program.
This document covers the following topics:
To use the Natural NOCSTAT command
Enter the direct command
NOCSTAT.
The main NOCSTAT screen is
displayed:
16:05:43 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Name .................. ________
Library ............... SAGTEST_
NOCable Objects only .. _
Output Report ......... X Statement Category
_ Statement Type
_ Code Profile
Output Destination .... X Screen
_ CSV to Work File
_ XML to Work File
with XSL ________________________________
Progress Control ...... X
Download to PC ........ _
Command ===>
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12---
Help Exit Canc |
To obtain field-specific help information, either enter a question
mark in the relevant field and press ENTER, or place the cursor in
the field and press PF1. Press PF3 to exit
NOCSTAT.
You can generate statistical reports for a single program or a set of programs. If you analyze more than one program at a time, the reports are produced in series. When you have finished looking at one report, press ENTER to view the next report.
The main NOCSTAT menu provides the following
options:
| Field | Explanation | |
|---|---|---|
Name |
Enter a name or a range of names to specify the program(s) you want to examine: | |
value is any combination
of one or more characters.
|
||
value |
Single program. | |
* |
All programs. | |
value* |
All programs whose names begin with
value.
|
|
value> |
All programs whose names are
greater/equal value.
|
|
value< |
All programs whose names are less/equal
value. |
|
Library |
Enter the name of a
library or specify a range; the same applies as described for the Name field
above.
The current library is the default. |
|
|
|
Mark this option to
exclude programs already compiled with the Natural Optimizer Compiler.
Otherwise, the |
|
Output Report |
Mark any of the options
to select statements by category, type or code profile.
See Statement Category, Statement Type and Code Profile below. |
|
Output
Destination |
Mark any of the following options to determine the output format and destination: | |
Screen |
Displays the report on the screen or
writes the report data to Print File 7 if Download to PC is selected
for processing.
|
|
CSV to Work File |
Generates spreadsheets with
comma-separated values.
The report data is written to either of the following files:
Use the file extension You can only route reports to a PC if Entire Connection is installed. |
|
XML to Work File |
Generates XML documents.
The report data is written to either of the following files:
Use the file extension You can only route reports to a PC if Entire Connection is installed. If a value is entered in the field <?xml-stylesheet type="text/xsl" href=" value "?> The value entered should be the absolute or relative URL of the style sheet, for example: nocstat.xsl or http://natural.software-ag.de/nocstat.xsl The processing instruction causes the document to be transformed according to the given style sheet when it is viewed by an XSLT-capable browser or transformed by a batch XSLT run. A typical use of this feature is to convert the output XML to an HTML page. There are two XSLT style sheets delivered with Natural
as text objects
Download the style sheets with file extension
|
|
Progress
Control
|
Only applies in an online
environment and if one of the following options is selected for processing:
If one of these options is selected, a brief message appears for each program listed in the generated report. |
|
Download to
PC |
Only applies if Entire
Connection is installed, and if you run online with Print/Work File 7 defined
as the PC file (see the WORK and
PRINT
profile parameters).
Download report output data with Entire Connection to a PC by using either of the following:
|
|
You can choose between three output formats described below to
display the statistics NOCSTAT provides for the statements
analyzed. Different report layouts are produced for programs already optimized
with the Natural Optimizer Compiler and for programs to be considered for
optimization. The example reports below show the difference. Press
PF3to interrupt report processing and return to the
NOCSTAT menu.
Below is information on:
The statistical report generated with the option Statement
Category lists various categories of statements with the corresponding
number of occurrences and the total number of statements already optimized or
suitable for optimization, depending on whether or not the program was
optimized with the Natural Optimizer Compiler.
11:49:46 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Library SAGTEST Name NOCTEST1 Type Program
No NOC NOCable
-------- --------
Database Loop: 0 0
Database Simple: 0 0
SORT / WORK I/O: 0 0
FOR / REPEAT: 0 1
Screen / Printer: 1 0
String Manipulation: 6 34
Arith / Logical: 0 996
Program Calls: 20 0
Control Transfer: 2 182
Block Start: 1 0
Set Environment: 7 0
System Functions: 2 0
Miscellaneous: 0 1
Total Statements: 1254
NOC optimizable: 1214 ( Ratio: 96 % )
Longest NOC Run: 216 Statements |
11:51:25 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Library SAGTEST Name NOCTEST1 Type Program
MCG Options: (ON,OVFLW,INDX,MIX,IO)
Database Loop: 0
Database Simple: 0
SORT / WORK I/O: 0
FOR / REPEAT: 0
Screen / Printer: 1
String Manipulation: 36
Arith / Logical: 0
Program Calls: 20
Control Transfer: 2
Block Start: 1
Set Environment: 7
System Functions: 2
Miscellaneous: 1
Total Statements: 1255
NOC optimized: 1185 ( Ratio: 94 % )
Longest NOC Run: 136 Statements |
| Column | Explanation |
|---|---|
No NOC |
Statements not suitable for optimization. |
NOCable |
Statements suitable for optimization.
Note: |
| Field | |
Database Loop |
The number of database statements that generate a
processing loop, such as FIND and READ.
|
Database Simple |
Database statements that do not generate a
processing loop, such as STORE, UPDATE,
DELETE and GET.
|
SORT / WORK I/O |
SORT and work file statements.
|
FOR / REPEAT |
Statements generating loops. |
Screen / Printer |
Screen and printer I/O, such as WRITE,
DISPLAY and INPUT.
|
String Manipulation |
String statements, such as EXAMINE and
COMPRESS.
|
Arith / Logical |
Arithmetic and logical statements, such as
MOVE, COMPUTE and IF.
|
Program Calls |
Transfer of control to a subroutine or subprogram,
such as PERFORM, CALLNAT and
FETCH.
|
Control Transfer |
Jumps within the program, such as ESCAPE
BOTTOM, FOR and REPEAT loops.
|
Block Start |
Non-executed statements that demarcate code blocks,
such as DEFINE SUBROUTINE and AT END. These
statements are never optimized because they are never executed.
|
Set Environment |
Statements that set the environment, such as
SET CONTROL, SET GLOBALS and SET
KEY.
|
System Functions |
Statements, such as TOTAL,
SUM, COUNT, MAX, MIN and
*COUNT.
|
Miscellaneous |
Pseudo-code statements not relevant for optimization and, therefore, ignored by the NOC. |
| Totals | |
Total Statements |
The total number of statements found in the
program. This number may not correspond to the actual source statements as
described in the introduction to NOCSTAT command above.
|
NOC optimized |
For an optimized program, these are the actual
pseudo-code statements (as described in the introduction to
NOCSTAT command above) that have been NOC-optimized to machine
code.
|
NOC optimizable |
For non-optimized programs, this is the possible
number of statements that could be optimized. The figure may be slightly higher
than the actual number, since certain factors are not considered in the
NOCSTAT program. For example, a SUBSTRING statement
that has more than four arrays will be indicated as "optimizable"
though it will not be optimized.
|
Ratio |
Relation between Total Statements and NOC-optimized statements or Total Statements and NOC-optimizable statements in percent. |
Longest NOC Run |
NOC-optimized program:
The number of contiguous optimized statements - the fewer fragment sequences, the better the performance. |
| Non-optimized program:
The number of contiguous statements to be expected if the program were optimized. |
The statistical report generated with the option Statement
Type lists single statements with the corresponding number of
occurrences and the NOC coding generated for optimized objects.
12:29:23 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Library SAGTEST Name NOCTEST1 Type Program
Statement No NOC NOCable
------------------------ -------- --------
MOVE/COMPUTE/ASSIGN 0 615
EXAMINE 6 0
SEPARATE 0 30
COMPRESS 0 4
MOVE TO SYSTEM FUNCTION 2 0
CALLNAT/PERFORM EXTERNAL 17 0
MOVE EDITED 1 0
ELSE/CLOSE LOOP 0 182
ON ERROR 1 0
END 1 0
STOP 1 0
IF 0 51
IF IN REPEAT UNTIL 0 1
REPEAT 0 1
RESET 0 74
IF 0 255
FETCH 3 0
IGNORE 0 1
STACK TOP CMD/DATA 2 0
MCG OPTIONS 1 0
OPTIONS 1 0
SET CONTROL 4 0 |
12:31:30 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Library SAGTEST Name NOCTEST1 Type Program
MCG Options: (ON,OVFLW,INDX,MIX,IO)
Statement Number
------------------------ --------
EXAMINE 6
SEPARATE 30
MOVE TO SYSTEM FUNCTION 2
CALLNAT/PERFORM EXTERNAL 17
MOVE EDITED 1
NOC CODE 1183
ON ERROR 1
END 1
STOP 1
FETCH 3
IGNORE 1
STACK TOP CMD/DATA 2
MCG OPTIONS 2
OPTIONS 1
SET CONTROL 4 |
The statistical report generated with the option Code
Profile displays contiguous sequences of statements grouped by
categories in a source program suitable for optimization, or lists the NOC
coding generated for an optimized program. Occurrences are highlighted.
12:38:52 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Library SAGTEST Name NOCTEST1 Type Program
Line Statement
----- -------------------------
0000 ON ERROR
0000 MCG OPTIONS
0000 OPTIONS
0295 CALLNAT/PERFORM EXTERNAL
0295 MOVE/COMPUTE/ASSIGN <-- NOCable
0295 MOVE/COMPUTE/ASSIGN <-- NOCable
0295 MOVE/COMPUTE/ASSIGN <-- NOCable
0295 MOVE/COMPUTE/ASSIGN <-- NOCable
0740 MOVE/COMPUTE/ASSIGN <-- NOCable
0745 IF <-- NOCable
0750 MOVE/COMPUTE/ASSIGN <-- NOCable
0755 MOVE/COMPUTE/ASSIGN <-- NOCable
0760 CALLNAT/PERFORM EXTERNAL
0765 IF <-- NOCable
0770 MOVE/COMPUTE/ASSIGN <-- NOCable
0775 ELSE <-- NOCable
0780 MOVE/COMPUTE/ASSIGN <-- NOCable
0810 RESET <-- NOCable
MORE |
12:39:47 ***** NATURAL NOCSTAT COMMAND ***** 2017-05-29
Library SAGTEST Name NOCTEST1 Type Program
Line Statement
----- -------------------------
0000 MCG OPTIONS
0005 MCG OPTIONS
0000 OPTIONS
0295 CALLNAT/PERFORM EXTERNAL
0295 NOC CODE
0295 NOC CODE
0295 NOC CODE
0295 NOC CODE
0740 NOC CODE
0745 NOC CODE
0750 NOC CODE
0755 NOC CODE
0760 CALLNAT/PERFORM EXTERNAL
0765 NOC CODE
0770 NOC CODE
0775 NOC CODE
0780 NOC CODE
0810 NOC CODE
MORE |
Below are job examples for processing NOCSTAT reports
in batch mode to create a CSV work file. After job execution, the work files
generated can be transferred from host to PC for further processing with
standard transfer tools.
//NOCBATCH JOB (NOC,,,30),CLASS=K,MSGCLASS=X 00000100
//NATEX EXEC PGM=NATvrsBA,REGION=6200K,PARM=('IM=D') 00000200
//STEPLIB DD DISP=SHR,DSN=TESTNAT.LOAD 00000300
//CMPRINT DD SYSOUT=X 00000400
//CMWKF01 DD DSN='NOC.NOCSTAT.OUT',DISP=(NEW,CATLG), 00000500
SPACE=(CYL,(1,1)),UNIT=SYSDA,VOL=SER=SAG001 00000600
//SYSOUT DD SYSOUT=X 00000700
//CMSYNIN DD * 00000800
NOCSTAT 00000900
*,library,,X,,,,X 00001000
. 00001100
FIN 00001200
/* 00001300