Use this command to change the control levels for the CPU loop, the CREATE
macros, or the input list. The CPU loop levels determine when to
service the various lists in the loop program. The CREATE macro levels
determine when to activate a CREATE macro. Main storage availability
determines the levels in each case. You can use this command to tune or
change the activity of the real-time system in a dynamic
environment.
Requirements and Restrictions
- You can enter this command only for the basic subsystem (BSS).
- You can enter this command only from the prime CRAS.
- Only system programmers should use this command.
Format
Notes:
- You can also separate the parameters with a comma (,).
- MXECBS
- changes the maximum number of entry control blocks (ECBs) allowed in the
TPF system.
- MNFRAI
- changes the minimum number of frames that must be available to service the
input list.
- MNCMBI
- changes the minimum number of common blocks that must be available to
service the input list.
- MNECBI
- changes the minimum number of ECBs that must be available to service the
input list.
- MNSWBI
- changes the minimum number of system work blocks (SWBs) that must be
available to service the input list.
- MNIOBI
- changes the minimum number of I/O blocks that must be available to service
the input list.
- MXECBD
- changes the maximum number of ECBs in the TPF system that cannot be
exceeded to service the deferred list.
- MNFRAT
- changes the minimum number of frames that must be available to activate
the time available supervisor.
- MNCMBT
- changes the minimum number of common blocks that must be available to
activate the time available supervisor.
- MNECBT
- changes the minimum number of ECBs that must be available to activate the
time available supervisor.
- MNSWBM
- changes the minimum number of SWBs that must be available to activate a
CREMC macro.
- MNSWBD
- changes the minimum number of SWBs that must be available to activate a
CREDC macro.
- MNSWBX
- changes the minimum number of SWBs that must be available to activate a
CREXC macro.
- value
- is a decimal number from 1-32 767.
Additional Information
- Online help information is available for this command. To display
the help information, enter one of the following:
ZACLV HELP
ZACLV ?
- Enter the ZDCLV command to display the current control levels for the CPU
loop, the CREATE macros, and the input list.
Examples
New values are assigned to the MXECBS and MNFRAI parameters in the
following example.
+--------------------------------------------------------------------------------+
|User: ZACLV MXECBS-200 MNFRAI-100 |
| |
|System: ACLV0001I 15.28.54 STORAGE CONTROLS |
| |
| DESCRIPTION VALUE ZACLV PARM |
| |
| SYST MAX ECB 200 MXECBS |
| INPUT MIN FRAME 100 MNFRAI |
| MIN COMMON 18 MNCMBI |
| MIN ECB 100 MNECBI |
| MIN SWB 38 MNSWBI |
| MIN IOB 51 MNIOBI |
| DEFER MAX ECB 40 MXECBD |
| TAS MIN FRAME 300 MNFRAT |
| MIN COMMON 59 MNCMBT |
| MIN ECB 200 MNECBT |
| CREM MIN SWB 26 MNSWBM |
| CRED MIN SWB 64 MNSWBD |
| CREX MIN SWB 64 MNSWBX |
| NOTE: ABOVE DISPLAY REFLECTS UPDATED LEVELS |
+--------------------------------------------------------------------------------+
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