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Problem
CMS ("Code Management System") may appear very slow in guest OS (VMS) on certain fast CHARON-VAX hosts. A process running CMS places itself into hibernation for unknown reason, and wakes up once a second. This regular hibernation makes the CMS utility very slow. Reason for hibernation is not clear and appears to be a "feature" of CMS.
Solution
To workaround this problem a special utility "FRCWAK" ("FoRCed WAKeup") has been developed by Stromasys. It wakes up the process running CMS 10 times a second. Which effectively reduces total time the process stays in hibernation, and makes the CMS utility moving faster.
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To apply the workaround:
- Download zip archive containing a disk image with "FRCWAK" utility executable.
- Unzip the archive.
- Mount this disk image under host OS (VMS) and copy the utility to "sys$sysdevice:[frcwak]" folder.
Use it in the following way: $ run /process='f$getjpi("","PID")' sys$sysdevice:[frcwak]frcwak
$ < ... CMS operations ... >
$ stop 'f$getjpi("","PID")' |
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Note that the PID of the process which needs wakeup is passed to "FRCWAK" utility through name of the process running the utility. |
In certain situations the provided executable of "FRCWAK" utility has to be re-compiled. Use its source code for that (this source code is also available on the utility's disk image - see above):
$ cc/list frcwak.c
$ link frcwak |
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Related articles
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| labels | charon openvms |
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Readers/approval
- Your approval is needed for this document Bruno Miretti (Deactivated)
- Your approval is needed for this document Gregory Reut
- Your approval is needed for this document Vadim Model
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