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littlepeaks
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Strange CPU Times
I recently gave in and upgraded one of my PCs to Windows 11. Now when I do MCM work units, it reports a very low CPU time. For instance, I recently completed MCM1_0196816_8019 and it reported Cpu time/ Elapsed time as 0.02 / 0.75 -- what's up with that? Also the results says I'm running Windows 10, when I'm running Windows 11.
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[Edit 1 times, last edit by littlepeaks at Feb 27, 2023 5:54:45 AM]
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BobbyB
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Re: Strange CPU Times
I presume the upgrade is to a more powerful machine so it makes sense that the CPU time is lower. Are the credits the same as on the old machine (or close).

But then those times are small. What did you upgrade to? a Quantum computer? smile
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Sgt.Joe
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Re: Strange CPU Times
I recently gave in and upgraded one of my PCs to Windows 11. Now when I do MCM work units, it reports a very low CPU time. For instance, I recently completed MCM1_0196816_8019 and it reported Cpu time/ Elapsed time as 0.02 / 0.75 -- what's up with that? Also the results says I'm running Windows 10, when I'm running Windows 11.

Would care to post a link to that work unit ? I would interesting to see what time the wingman had.

Cheers
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Sgt. Joe
*Minnesota Crunchers*
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littlepeaks
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Re: Strange CPU Times
Results link is https://www.worldcommunitygrid.org/contribution/workunit/268536714
And here is a result link from before the upgrade: https://www.worldcommunitygrid.org/contribution/workunit/261730620

Yes, it's a pretty speedy machine. The elapsed time is pretty normal for that machine for MCM work units, but historically, the CPU time on that machine is usually close to the elapsed time.

And as an answer to BobbyB, this machine has been in service for over a year -- the only change is upgrading from Windows 10 to Windows 11.
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Sgt.Joe
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Re: Strange CPU Times
That result is certainly a bit baffling. To have such a shift in magnitude simply by changing the OS begs for some explanation. Has Microsoft suddenly found some great new shortcut in the OS overhead ??? It would be illuminating to see if anyone else with similar machine specs has experienced such an incredible speedup or if anyone has seen this type of result.. Time will tell if it is only a one-off or if the results continue.
If it does continue, that would be an incredible advance. We certainly won't know until they release more MCM units and you can see if the results are repeatable. More information is needed.

Cheers
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Sgt. Joe
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TPCBF
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Re: Strange CPU Times
And as an answer to BobbyB, this machine has been in service for over a year -- the only change is upgrading from Windows 10 to Windows 11.
The BOINC client (rather than anything directly WCG related) is misidentifiying OS versions for years (and not that this would make a difference with crunching in the first place). I have machines that have been upgraded to Windows 10 four (4) years ago and it still shows up as Windows 8.1, a freshly installed Windows Server 2019 shows up as Windows Server 2016 and a couple other of such frivolities... ;-)

Ralf
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adriverhoef
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Re: Strange CPU Times
(Copied from the designated MCM1-task:)
[05:53:10] Initializing
[05:53:16] Running
[05:53:16] EvaluateFitnessOfStartingGeneSignatures 12071
[06:37:58] Writing final output
[06:37:58] Closing Output Stream
[06:37:58] Cleaning up
Run complete, CPU time: 69.406250

In reailty, that task ran some 44 minutes, nearly 45. Still quite fast.
It would be illuminating to see if anyone else with similar machine specs has experienced such an incredible speedup or if anyone has seen this type of result..

A similar experience, not quite the same, was seen when this happened on my laptop:

workunit 264654804
MCM1_0196470_5763_0  Linux         Valid  2023-02-12T16:45:21  2023-02-16T11:05:23    4.75/4.77      99.1/53.8
MCM1_0196470_5763_1  Linux Ubuntu  Valid  2023-02-12T16:45:45  2023-02-12T20:51:27    0.17/0.17       8.6/53.8
---------------------------------------------------------------------------------------------------------------------------------------
Details:
MCM1_0196470_5763_1  Linux Ubuntu  Valid  2023-02-12T16:45:45  2023-02-12T20:51:27    0.17/0.17       8.6/53.8
	[17:46:33] Initializing
	[17:46:36] Running
	[17:46:36] EvaluateFitnessOfStartingGeneSignatures 12071
	[20:02:16] Writing final output
	[20:02:16] Closing Output Stream
	[20:02:16] Cleaning up
	Run complete, CPU time: 8074.091142

workunit 264645357
MCM1_0196464_1879_0  Linux         Valid  2023-02-12T16:25:05  2023-02-13T16:18:36    7.25/7.26      93.2/50.9
MCM1_0196464_1879_1  Linux Ubuntu  Valid  2023-02-12T16:25:13  2023-02-12T20:51:27    0.17/0.17       8.6/50.9
---------------------------------------------------------------------------------------------------------------------------------------
Details:
MCM1_0196464_1879_1  Linux Ubuntu  Valid  2023-02-12T16:25:13  2023-02-12T20:51:27    0.17/0.17       8.6/50.9
	[17:45:37] Initializing
	[17:45:41] Running
	[17:45:41] EvaluateFitnessOfStartingGeneSignatures 12071
	[20:02:40] Writing final output
	[20:02:40] Closing Output Stream
	[20:02:40] Cleaning up
	Run complete, CPU time: 8149.828344

In these two cases, the CPU-times were about 8000 seconds, that's about 2.2 hours.
Nevertheless, only 0.17 hours were recorded for both of them.

Looking at the API, other tasks that were returned by me at that time also didn't have a proper CPU-time:

CpuTime Elapsed Claimed Granted SentTime            ReceivedTime        WorkunitId Name
   1.67    1.67    85.7    98.4 2023-02-12T14:48:43 2023-02-12T20:51:27  264603308  MCM1_0196472_1844_0
   1.17    1.17    60.1    74.5 2023-02-12T15:47:48 2023-02-12T20:51:27  264629503  MCM1_0196469_6613_1
   0.50    0.50    25.8    59.1 2023-02-12T15:52:05 2023-02-12T20:51:27  264631684  MCM1_0196454_3105_0
   1.17    1.17    60.1    89.7 2023-02-12T15:34:13 2023-02-12T20:51:27  264623907  MCM1_0196470_2617_1
   0.17    0.17     8.6    50.9 2023-02-12T16:25:13 2023-02-12T20:51:27  264645357  MCM1_0196464_1879_1
   1.34    1.34    68.6    95.0 2023-02-12T15:15:49 2023-02-12T20:51:27  264615671  MCM1_0196469_4924_1
   0.17    0.17     8.6    53.8 2023-02-12T16:45:45 2023-02-12T20:51:27  264654804  MCM1_0196470_5763_1

It may have had something to do with the fact that the lid of the laptop was closed, which it normally isn't. Strange but true.
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littlepeaks
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Re: Strange CPU Times
Yes, but on your machine, the CPU time and elapsed time are the same -- on mine, they're wayyyyyy different.
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TPCBF
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Re: Strange CPU Times
Yes, but on your machine, the CPU time and elapsed time are the same -- on mine, they're wayyyyyy different.
Nothing unusual. I have a 10 core/20 thread i7 which is heaviliy used during the day time and there MCM1 WUs usually have something like 12h-15h "elapsed time" but only 1.5h-2h CPU time...

Ralf
MCM1_0196842_2645_1 Precision3660-1 Valid 2023-02-18 22:58:33 UTC 2023-02-24 22:58:33 UTC 2023-02-21 03:07:22 UTC 2.16 / 17.7 198.8 / 138.4
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littlepeaks
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Re: Strange CPU Times
I dunno. In your case the CPU time is 12.5% of the elapsed time.
In my case, .02 is only 2.67% of the elapsed time.
And .02 is only 1.2 minutes.
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