OpenVMS Alpha Version 7.1 and later contains system
parameters that control the operation of bus-addressable pool (BAP).
The CIPCA, CIXCD, KFMSB, and Qlogic ISP 1020 (KZPSM-AA)
adapters are some of the adapters that use bus-addressable pool to
improve performance. BAP is a non-paged dynamic, physical-address-filtered
memory pool used to overcome I/O bus and 32-bit adapter physical addressing
limits.
The following table lists the BAP system parameters
and their default values:
| System
Parameter | Default
Value |
|---|
NPAG_BAP_MIN | 0 |
NPAG_BAP_MAX | 0 |
NPAG_BAP_MIN_PA | 0 |
NPAG_BAP_MAX_PA | -1 |
The default values of these parameters enable
the system to boot with any configuration. When AUTOGEN is run on
a configured system, it resets these parameters to values that should
enhance performance for the current system configuration.
If this is an upgrade of OpenVMS, or if the system
fails to boot after a hardware change and displays a message that
refers to incorrect BAP parameters, HP recommends that you perform
the following steps:
To
begin the conversational boot, use the BOOT command in the following
format:
BOOT -FLAGS 0,1 [device-name]
For device-name, substitute
the device name of your system disk drive from which you want to boot.
For example, if the system disk has a device name of DKA400, enter
the following command and press the Enter key:
>>> BOOT -FLAGS 0,1 DKA400 |
At
the SYSBOOT> prompt, enter the following:
NPAG_BAP_MIN 0
NPAG_BAP_MAX 0
NPAG_BAP_MIN_PA 0
NPAG_BAP_MAX_PA -1
This
should enable the system to boot. Once completed, enter the following
command:
$ RUN SYS$SYSTEM:AGEN$FEEDBACK.EXE |
The
command entered in the preceding step creates a file that will contain
the BAP values for the system in its current configuration. To see
what they are, enter the following command (the BAP parameters in
AGEN$FEEDBACK.DAT do not include the NPAG_ prefix):
$ SEARCH SYS$SYSTEM:AGEN$FEEDBACK.DAT BAP |
Check
MODPARAMS.DAT for any hardcoded BAP values by entering the following
command:
$ SEARCH SYS$SYSTEM:MODPARAMS.DAT BAP |
