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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.misc
Subject: Re: Inside an IBM z17
Date: Mon, 5 May 2025 22:22:57 -0000 (UTC)
Organization: A noiseless patient Spider
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On Mon, 5 May 2025 08:30:03 -0400 (EDT), Scott Dorsey wrote:

> In article <vv9fdc$3mhk4$1@dont-email.me>,
> Lawrence D'Oliveiro  <ldo@nz.invalid> wrote:
>>
>> Meanwhile, Linux recently mainlined the PREEMPT_RT patches, where the
>> definition of real time is being able to provide sub-millisecond
>> response to playing or recording sound samples for pro audio.
> 
> That's still not hard realtime at all ...

Tell that to the audio engineers in particular. They are kind of sensitive 
to the slightest bit of jitter in the timing of things.

> But what they mean by "RT" isn't what hard realtime people mean by "RT"
> which has nothing to do with what the transaction processing guys meant
> as "RT."  Do not get hung up on words, especially when people use the
> same words for rather different concepts.

Particularly when the transaction processing folks are at the bottom of 
that particular league table ...