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Message 34685 - Posted: 15 Jan 2014 | 22:57:53 UTC
Last modified: 15 Jan 2014 | 22:59:17 UTC

Hi, In Linux UBUNTU few days ago the CPU usage on tasks both long and short has fallen 8% despite having configured (as always) to target a core app_config the GPU.

Windows 8.1 in normal operation

Until now the CPU load was nearly 100%...?

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Message 34689 - Posted: 16 Jan 2014 | 15:26:37 UTC - in response to Message 34685.

I978-SANTI_baxbimSPW2-43-62-RND9218_0 5086198 14 Jan 2014 | 19:53:29 UTC 14 Jan 2014 | 22:11:19 UTC Completed and validated 7,376.41 848.44 20,550.00 Short runs (2-3 hours on fastest card) v8.00 (cuda55)

I867-SANTI_baxbimSPW2-43-62-RND1004_0 5082601 13 Jan 2014 | 12:45:10 UTC 13 Jan 2014 | 14:55:50 UTC Completed and validated 7,200.50 7,193.30 20,550.00 Short runs (2-3 hours on fastest card) v8.00 (cuda55)

I checked my systems and a few other systems but did not see this effect. So I don't thinks it's a batch issue. I guess a driver issue caused the SWAN sync to stop working.
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Message 34691 - Posted: 16 Jan 2014 | 20:52:00 UTC - in response to Message 34689.


I checked my systems and a few other systems but did not see this effect. So I don't thinks it's a batch issue. I guess a driver issue caused the SWAN sync to stop working.


Hi, Thanks for the comment.

As I'm using Ubuntu 14.04 Beta with continuous updates will be that the problem (so far it has worked perfectly)'ll see if it fixes it. Greetings.

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Message 34702 - Posted: 17 Jan 2014 | 16:21:49 UTC

On my Ubuntu 12.04 systems the CPU is usually 99 - 100% with occasional dips down to 98%. I don't have SWAN sync set via an environment variable because I've heard that is no longer necessary.

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Message 34719 - Posted: 18 Jan 2014 | 22:48:50 UTC - in response to Message 34702.

Hello, After several short and long tasks with little CPU load in real time differences in implementation are minimal, in the long run it took about 8 minutes approx (24791.08 +2,503.30) to complete the "task-9x475-NOELIA_FXArep 1-2-RND8100_0 "

In short tasks the difference is almost negligible naturally much lower, (+120 sec. Middle).

In short, I think the balance is positive because with a low CPU load practically the results are almost the same with the CPU at 100% with the consequent cost, temperatures etc ...

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Message 34720 - Posted: 19 Jan 2014 | 1:03:23 UTC - in response to Message 34719.
Last modified: 19 Jan 2014 | 1:04:00 UTC

Maybe the load is not being reported correctly in Ubuntu 14.04?

Or maybe the CPU scheduler is improved in 14.04?
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Message 34728 - Posted: 19 Jan 2014 | 13:06:30 UTC - in response to Message 34720.
Last modified: 19 Jan 2014 | 13:09:36 UTC

Maybe the load is not being reported correctly in Ubuntu 14.04?

Or maybe the CPU scheduler is improved in 14.04?


Hi, The CPU load is surely well informed and that corresponds to a lower temperature reported by CPU and system information.

Moreover -app_config- secure the read and interpreted is assigned as exclusive, as scheduled, a CPU to the GPU but in the case of GPUGRID not translated into an increase in the load of the CPU.

I remember that in reality is only GPUGRID the project in that the allocation of an exclusive GPU meant a greater burden of the CPU, in other projects is not always so (eg Einstein and Asteroids)

Very possibly a bug in the BOINC settings in 14.04 Beta, you'll see what happens in the following updates.

Ubuntu 14.04 is working generally very well with very few problems.

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Message 34835 - Posted: 27 Jan 2014 | 22:28:34 UTC - in response to Message 34728.

Hi, In Ubuntu 13.10 the CPU load is 98% on average, so it is confirmed that only Ubuntu 14.10 BETA little CPU load moment at least is given, see the following updates.

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Message boards : Number crunching : Low CPU in Linux Ubuntu

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