Flakey AMD/ATI GPUs, including RX 5700 XT, Cross Validating, polluting the Database

Message boards : Number crunching : Flakey AMD/ATI GPUs, including RX 5700 XT, Cross Validating, polluting the Database
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Richard Haselgrove Project Donor
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Message 2034271 - Posted: 27 Feb 2020, 20:36:16 UTC - in response to Message 2034267.  

im still not sure why he got credit for it then. i've seen plenty of WUs invalidate for less.
You're only able to look at the raw signal count from out here. The actual validation is done against the 20KB - 30KB result file which is uploaded at the end of processing - just one of those signals can look like:

<gaussian>
  <peak_power>5.7957577705383</peak_power>
  <mean_power>0.57813739776611</mean_power>
  <time>2458905.5078695</time>
  <ra>6.5102765875108</ra>
  <decl>8.7759971597974</decl>
  <q_pix>0</q_pix>
  <freq>1418912409.544</freq>
  <detection_freq>1418914503.6237</detection_freq>
  <barycentric_freq>0</barycentric_freq>
  <fft_len>16384</fft_len>
  <chirp_rate>42.310804859724</chirp_rate>
  <rfi_checked>0</rfi_checked>
  <rfi_found>0</rfi_found>
  <reserved>0</reserved>
  <sigma>1.5730149745941</sigma>
  <chisqr>1.3424669504166</chisqr>
  <null_chisqr>2.281421661377</null_chisqr>
  <score>0</score>
  <max_power>11.661991119385</max_power>
  <pot length=181 encoding="x-csv">
    16,3,7,4,2,8,21,20,3,8,30,10,6,0,18,6,13,5,2,4,17,38,4,1,54,11,55,7,33,
    255,198,28,76,41,1,25,12,16,13,13,3,2,5,9,20,45,5,17,22,31,22,1,4,23,3,
    4,21,1,26,4,1,10,5,28
  </pot>
</gaussian>
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Ian&Steve C.
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Message 2034272 - Posted: 27 Feb 2020, 20:39:02 UTC - in response to Message 2034271.  

yes, but even looking at the raw signal counts, if one result has wildly different counts than the other, can they really be similar?

i found 3 apples
i found 5 apples

hmm, but 2 of them look kind of the same, good enough!
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Richard Haselgrove Project Donor
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Message 2034274 - Posted: 27 Feb 2020, 20:45:02 UTC - in response to Message 2034272.  

"weakly similar" is really very, very, weak.
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Ian&Steve C.
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Message 2034276 - Posted: 27 Feb 2020, 20:49:58 UTC - in response to Message 2034274.  

my point is less about a canonical result. and that's good that it's not being used.

but it's giving this user the false impression that their system is all good because it's getting "mostly valid" results, but they aren't really. if they invalidated, the user would be faced with the realization that something needs to be rectified.
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Richard Haselgrove Project Donor
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Message 2034286 - Posted: 27 Feb 2020, 22:20:01 UTC - in response to Message 2034276.  

I think this dates back to the very early days of SETI@Home, when the whole concept of 'distributed computing' was weird and nobody knew whether it would take off. The idea was to give users a warm, fuzzy feeling for a 'good try'.

Unfortunately, in this case, it seems to have succeeded only too well...
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Message 2034291 - Posted: 27 Feb 2020, 22:24:50 UTC - in response to Message 2034276.  

So there are two issues.
One, why are invalid results being marked as valid?
Two, why is it returning invalid results?
The installed GPU drivers are the most current available and have been on since early February.
I will disable the GPU from receiving work but that doesn't fix the issue which I would think is more wide spread than just my system.
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Message 2037090 - Posted: 10 Mar 2020, 9:59:42 UTC

Find this 5700 with lot of invalids

8896142
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Message 2038012 - Posted: 15 Mar 2020, 3:32:08 UTC

I found another 5700 with lots of invalids https://setiathome.berkeley.edu/results.php?hostid=8854997
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Message 2038027 - Posted: 15 Mar 2020, 6:38:48 UTC

It's just a shame that BOINC can't work out and display those AMD driver versions used, but I'd say that they're just using the drivers that were supplied at the time of intro and don't have those with the proper OpenCL support.

Cheers.
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Message 2047387 - Posted: 28 Apr 2020, 12:29:22 UTC

What is the status on Linux drivers for the RX 5700 XT? Still broken?

I think I understand that the Windows 10 drivers have been fixed?

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Message 2047423 - Posted: 28 Apr 2020, 16:50:42 UTC - in response to Message 2047387.  

What is the status on Linux drivers for the RX 5700 XT? Still broken?

I think I understand that the Windows 10 drivers have been fixed?

Tom M

If you read further back in this thread, the latest AMD drivers have fixed the issue with the 5700* cards.
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Message 2047424 - Posted: 28 Apr 2020, 16:53:16 UTC - in response to Message 2047423.  

Yes, for Windows. But a driver change in a windows package doesn’t necessarily get reflected in the Linux package.

I don’t know if there is/was any real confirmation of RX5700+Linux being fixed.
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Message 2047460 - Posted: 28 Apr 2020, 21:32:53 UTC - in response to Message 2047424.  

I don't know, I don't have the 5700 and I don't run amdgpu-pro. But, I can report that amdgpu drivers v20.10 were just released. It's hard to follow the versioning; release version is different than internal version. I'm assuming the new Linux drivers include the patches that were in the last Windows driver update. In any case, there are new drivers, so it is reasonable to re-evaluate the situation.
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Message 2047466 - Posted: 28 Apr 2020, 22:51:36 UTC - in response to Message 2047460.  

TY Paul.
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Message boards : Number crunching : Flakey AMD/ATI GPUs, including RX 5700 XT, Cross Validating, polluting the Database


 
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