[Info-vax] Timer resolution for sys$setimr() ?

Simon Clubley clubley at remove_me.eisner.decus.org-Earth.UFP
Thu Dec 5 08:05:00 EST 2024


On 2024-12-04, Arne Vajhøj <arne at vajhoej.dk> wrote:
> On 12/4/2024 8:37 AM, Simon Clubley wrote:
>> What is the actual resolution of timer events queued using the
>> sys$setimr() system service ?
>> 
>> NOTE: this is about when the timer becomes eligible to fire, not when
>> it actually does, given that VMS is not a hard RTOS.
>> 
>> The base VMS time format is in 100ns units, but I couldn't see anything
>> about the units actually used when firing timer events. Is it the same
>> as the hopeless terminal driver timeouts, or is it 100ns, or is it
>> something in between ?
>
> IDS VMS Alpha 1.5 (30 years old!) says:
>

[snip]

Thanks Arne. I never even thought to check the I&DS as this was something
I was expecting to find in the normal user documentation.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Walking destinations on a map are further away than they appear.


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