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General Description

The "Idle" IDLE utility significantly reduces the CHARON-AXP host CPU usage whenever a OpenVMS system is running on CHARON-AXP is idle.

"Idle" The utility stalls the emulated CPU when it detects an OpenVMS idle condition. While the "Idle" IDLE utility is running the emulated CPU consumes, on average, less host system CPU time.

(warning) However it is not recommended to employ "Idle" utility IDLE  utility in real-time process control environments.

These utility are located in the "idle_vms_pkg.vdisk" disk file in the "C:\Program Files \CHARON\Virtual Disk Images\idle_vms_pkg_v2v3.0".

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Installation

Specify this image in the CHARON-AXP configuration file, boot from the system disk and mount the disk with the following OpenVMS command:

$ MOUNT <device name> /OVERRIDE=IDENTIFICATION

In the [.AXP] folder of this disk you will see the following files:
 

README.TXT
SRI-AXPVMS-IDLE-V0102–1.PCSI
VMS62TO71U2_PCSI-V0200.PCSI-DCX_AXPEXE
VMS62TO71U2_PCSI-V0200.TXT

If the OpenVMS version is less than 7.1 the following steps must be applied:

  1. Copy the "VMS62TO71U2_PCSI-V0200.PCSI-DCX_AXPEXE" file to some directory on any spare disk and run this file from there:

    $ COPY VMS62TO71U2_PCSI-V0200.PCSI-DCX_AXPEXE SYS$DISK:[000000.TEMP]
    $ SET DEF SYS$DISK:[000000.TEMP]
    $ RUN     VMS62TO71U2_PCSI-V0200.PCSI-DCX_AXPEXE

  2. Install the patch:

    $ PRODUCT INSTALL VMS62TO71U2_PCSI /SOURCE=SYS$DISK:[000000.TEMP]

Id the patch has been installed return to the "[000000.AXP]" directory of the "idle_vms_pkg.vdisk" and proceed with installation of the "Idle" utility itself:

$ PRODUCT INSTALL IDLE /SOURCE=<directory containing the IDLE kit>

Once

the "Idle"

IDLE utility is installed it starts to take effect immediately, reducing the host system CPU usage if

VMS/Alpha

OpenVMS system running on CHARON-AXP is idle. No reboot is required.

The utility is loaded automatically on reboot, no additional configuring or startup sequence is needed. 

 

 

To run any of these utilities issue the following command: 

 

$ RUN <name of the utility>.EXE

or

$ @<name of the utility>.COM
Note

The SHUTDOWNn.EXE routines do not initiate the shutdown of the OpenVMS system running on CHARON-AXP, only of the emulator itself.

Establish a VMS shutdown procedure that can complete within the specified time

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Deinstallation

Specify this image in the CHARON-AXP configuration file, boot from the system disk and mount the disk with the following OpenVMS command:

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