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Credit drop since starting of the new batch of WU

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[boinc.at] Nowi

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Message 55919 - Posted: 23 Oct 2012, 7:19:15 UTC

Hello,

I have mentioned a dramatical credit drop beginning with the start of the new 22_3S-WU. I have observed the running times of the WU on my system (both GPU running two WU simultaneously):

7950:
22_3S 75 s/WU 106,99
09_2s 90 s/WU 159,86

runtime-comparison: 0,83333
credit-comparison: 0,66927
calculated credit on runtime-comparison: 133,22

6950:
22_3S 90 s/WU 106,99
09_2s 130 s/WU 159,86

runtime-comparison: 0,69231
credit-comparison: 0,66927
calculated credit on runtime-comparison: 110,67

So you can see that the credit output of both is lower than expected from the runtimes. Especially for the 7950 with the new GNC-architecture.

The credit drop is forced also by the massive errors per day.

Maybe the devs can look into this.

Cheers

Nowi

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Message 55920 - Posted: 23 Oct 2012, 9:15:29 UTC - in response to Message 55919.  

Seems to be an issue of the HD 79X0 cards, see message 55790. On my HD 3850 the runtime/credit ratio is pretty much exactly the same as before, the card has however other issues with the new separation WUs.
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Phil

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Message 55921 - Posted: 23 Oct 2012, 11:09:24 UTC

I have three 7970s and two 6990s. On the 6990s the new WUs give about the same credit per time interval (or at least they would if they didn't crash all the time). On the 7970s the run time is roughly the same, but for less credit.
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JHMarshall

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Message 55925 - Posted: 23 Oct 2012, 18:55:20 UTC - in response to Message 55919.  

Nowi,

Your run times for the HD7950 don't seem quite right. I have two HD7950s and they each run a "ps_separation_22_3s_free_3" work unit in 38 seconds. Your 75 seconds is much too long. What else is going on in your machine.

I have an i7-3770K cpu and always leave 2 "cores" free for GPU support.

Joe
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[boinc.at] Nowi

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Message 55928 - Posted: 23 Oct 2012, 20:03:27 UTC

The run time of 75 s is a result of running two WU simultaneously on one GPU via app_info.

It is not right to divide the time by two, but, if you want, the run time for one unit is 37.5 s.

This is nearly similar to your run time.
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JHMarshall

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Message 55930 - Posted: 23 Oct 2012, 21:48:28 UTC - in response to Message 55928.  

Whoops, I missed the two simultaneously part.
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EDU Enthusiasts of Digital Uni...

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Message 55957 - Posted: 25 Oct 2012, 23:11:44 UTC

on my 2x 6970 (1wu / gpu) i'm getting
329581069 259455156 25 Oct 2012 | 22:58:40 UTC 25 Oct 2012 | 23:03:20 UTC Completed and validated 40.01 2.14 106.99 MilkyWay@Home v1.02 (opencl_amd_ati)

106 credits...

i've used to get it like this...
51.03 2.46 159.86 MilkyWay@Home v1.02 (opencl_amd_ati)

dramatic credit loss... as i've looked through the tasks i seem to get those for 159 rarely like 1/600 tasks.
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[boinc.at] Nowi

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Message 55993 - Posted: 28 Oct 2012, 15:08:56 UTC

Are there any reaction from the devs.
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Message boards : Number crunching : Credit drop since starting of the new batch of WU

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