specification for the duration of the data collection session.
Future monitoring sessions will also return to theSYSMON specification unless again overridden. If the nu.ber .of
buffers specified in theSYSKON macro has been defaulted, then
the defaults, as described in theMONITOR START TAPE command,
are adopted.
IfCPTRACE is specified, the tracing cf events that occur on
the realmachine is begun. The events are recorded on the CP internal trace table in chronological order. When the end of
the table is reached, recording continues at the beginning of
the table, overlaying data previously recorded.
1.fTAPE is specified, data collection by MONITOR onto a tape
mounted on a 9-track tape drive is begun.Specify the real
hexadecimal address of the tape drive that you want to use in
raddr. This activates data collection for those classes ofMONITOR CALL previously specified in a MONITOR ENABLE command
and begins data collection. Themask that was saved by the MONITOR ENABLE command is moved into control register 8. The
data is collected into buffer pages in real storage. These
pagesare separate fro. the internal trace table pages. The BUFFS n operand, where n is a value from 1 to 10, specifies
the nu.ber of4096-byte buffers to be used for monitoring
operations. If the operand is omitted, a default value is
supplied depending upon the processormodel number. 135
138
145148 155
158
165
1683031 3032 3033 Buffers
--2--
2
2
3
3
34 4
4
44 The operator may specify BUFFS 1 if the command entry is limited to ENABLE PERFORM for data collection. Once monitoring is in progress with one buffer specified, it is not
possible to invokeMONITOR with additional ENABLE operands
because of the buffer limitation.Single buffer operation is useful for basic performance
analysis inminimum main storage configurations. 1s each data page is filled, it is written on the tape. CP issues a rewind command followed by a SET MODE co •• and for the
reset value of tape density whenMONITOR is started. You can request a different mode setting by specifying the MODE option
in theMOlITOR START TAPE command. Bode values of 800, 1600, or 6250 maybe specified. If you specify a density mode that
the tape drive cannot handle, the control unit does not return
an error condition. In this case, themode setting is ignored and the default control unit setting is used.
Section 3.CP Commands 99
Future monitoring sessions will also return to the
buffers specified in the
the defaults, as described in the
are adopted.
If
the real
the table is reached, recording continues at the beginning of
the table, overlaying data previously recorded.
1.f
mounted on a 9-track tape drive is begun.
hexadecimal address of the tape drive that you want to use in
raddr. This activates data collection for those classes of
and begins data collection. The
data is collected into buffer pages in real storage. These
pages
the nu.ber of
operations. If the operand is omitted, a default value is
supplied depending upon the processor
138
145
158
165
168
--2--
2
2
3
3
3
4
4
possible to invoke
because of the buffer limitation.
analysis in
reset value of tape density when
in the
the tape drive cannot handle, the control unit does not return
an error condition. In this case, the
Section 3.