[Info-vax] New free Load Average driver (LAXDRIVER) to replace LAVDRIVER

[Chris Scheers]

Jake Hamby wrote:
> On Monday, June 20, 2022 at 11:20:15 AM UTC-7, Arne Vajhøj wrote:
>>> That said, I do hope that you are right.
>> Copyright rules are pretty strict. Stuff in SYS$EXAMPLES 
>> are copyrighted and one need permission to use 
>> copyrighted material. 
>>
>> But I think in this case one could try argue: 
>> - the stuff in SYS$EXAMPLES are obviously intended 
>> to be used so it must be OK to use it at 
>> least locally 
>> - everybody using this code will obviously have 
>> a VMS system and a SYS$EXAMPLES with the same 
>> stuff already, so it is distributing code to people 
>> that already have a legal copy of that code 
>>
>> The argument also points to a workaround: distribute 
>> only ones own code and a script that merge it with 
>> SYS$EXAMPLES stuff. 
> 
> At some point I'll replace the comments with something shorter and written in my own style. I didn't want to do that originally mostly because I didn't want to claim authoritatively the system states that are described in the comments for the different callback functions that I filled in with my own code.
> 
> I'm still curious what's accounting for the load average being higher than I'd expect when there are 2 running/computable processes and 2 CPUs. I'd expect to see values closer to 2.0 than 3.5 to 4.0. At least it shows ~0.01 when idle. It looks to all appearances like a running process can show up as computable and also current on a CPU, including in the MONITOR system process counts. Not that this is the sort of thing that a hardware device driver would ever be concerned with, as opposed to a pseudo-device driver that's poking around in the system state.

I don't have the internals manual here just now, and things may have 
changed in later versions of VMS anyways, but when a process is made 
CUR, is it actually removed from the COM queue?

Also, depending on how you are scanning the queues, processes can move 
between queues while you are scanning.

-- 
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Chris Scheers, Applied Synergy, Inc.

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