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aus+uk / uk.comp.sys.mac / >100% CPU

SubjectAuthor
* >100% CPUmark
`* >100% CPUTheo
 `- >100% CPUMark

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>100% CPU

<u9e96o$3agfe$1@dont-email.me>

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From: email@domain.com (mark)
Newsgroups: uk.comp.sys.mac
Subject: >100% CPU
Date: Fri, 21 Jul 2023 16:45:28 +0100
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 by: mark - Fri, 21 Jul 2023 15:45 UTC

What does it actually mean when something uses more than 100% of the
CPU (as indicated by Activity Monitor?) On this old MBA here Mail seems
to be using around 120/130% - although I don't know what it's actually
doing while seemingly just sitting here!
--
Cheers ... Mark

Re: >100% CPU

<I9j*-RQlz@news.chiark.greenend.org.uk>

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: uk.comp.sys.mac
Subject: Re: >100% CPU
Date: 21 Jul 2023 17:02:06 +0100 (BST)
Organization: University of Cambridge, England
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Originator: theom@chiark.greenend.org.uk ([212.13.197.229])
 by: Theo - Fri, 21 Jul 2023 16:02 UTC

mark <email@domain.com> wrote:
> What does it actually mean when something uses more than 100% of the
> CPU (as indicated by Activity Monitor?)

On a multicore machine, >100% means more than one core is busy running a
particular process, typically because the program is running multiple
threads. Each 100% represents one core being occupied running that program.

> On this old MBA here Mail seems to be using around 120/130% - although I
> don't know what it's actually doing while seemingly just sitting here!

Mail.app maintains its state in SQLite database(s), and seems to spend an
inordinate length of time furtling them, for unknown reasons.

Theo

Re: >100% CPU

<u9ebac$3b055$1@dont-email.me>

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From: captain.black@gmail.com (Mark)
Newsgroups: uk.comp.sys.mac
Subject: Re: >100% CPU
Date: Fri, 21 Jul 2023 17:21:32 +0100
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 by: Mark - Fri, 21 Jul 2023 16:21 UTC

On 2023-07-21 16:02:06 +0000, Theo said:

> mark <email@domain.com> wrote:
>> What does it actually mean when something uses more than 100% of the
>> CPU (as indicated by Activity Monitor?)
>
> On a multicore machine, >100% means more than one core is busy running a
> particular process, typically because the program is running multiple
> threads. Each 100% represents one core being occupied running that program.

Ahhhhh... I see!
>
>> On this old MBA here Mail seems to be using around 120/130% - although I
>> don't know what it's actually doing while seemingly just sitting here!
>
> Mail.app maintains its state in SQLite database(s), and seems to spend an
> inordinate length of time furtling them, for unknown reasons.
>
> Theo

Righty-ho, thanks.

--
Cheers ... Mark

aus+uk / uk.comp.sys.mac / >100% CPU

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