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salopspring

Activity Monitor episode follow-up

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salopspring    15

Hi all,

Following Adam's recent Activity Monitor dedicated member episode, I had a look at the App and had one query that I don't think was mentioned in the show so I'm worried it might be a problem.

 

Basically, the CPU % for one application (Handbrake) has a value of 184% - that doesn't seem too logical to me. Anyone any thoughts?

 

Thanks

 

Andrew

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johnfoster    48

it means that two processors aren't 100% utilized.

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salopspring    15

it means that two processors aren't 100% utilized.

 

Obvious now!... so on a dual core machine you CAN have 200% utilisation.

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johnfoster    48

how is this a design flaw? showing CPU utilization on a 100 scale is how every OS shows usage. and if you have 2 or 4 or 12 cores each of the processors is shown it's usage on that same 100 scale. if a processor isn't being used it will show as 0%.

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Dolphbucs    2

Proof, perhaps, that Apple can get design wrong.

 

I wouldn't say it's so much the fact of getting design wrong ... Apple just hasn't gotten around to updating Activity Monitor to display multiple cores separately. The fact that third party programs such as iStat Pro displays a separate figure for each core shows that the system is sound and reporting the correct information. In fact, one could argue that the fact that Activity Monitor shows 2 cores ( one operating at 75% and the other at 85% ) as a single column displaying 160 %, is good design. At least it alerts you to the fact that there is something different than just a single processor running. When the current version of Activity Monitor was introduced, there were no ( or at least very few ) multiple core processors out there. Would it have been better design for the display to just stay maxed out at 100 % on multiple core systems ? I'll bet that Lion's version of Act Mon will "correct" this and show a separate display for each core ... and that will satisfy everyone until the next unforeseen processor design shift.

 

And BTW, since when do computer science terms EVER make logic or semantic sense anyway ( bit, byte, nibble )

Edited by Dolphbucs

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