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Message boards : Number crunching : ...complex...GIANNI_CPXB tasks failing right after start

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Erich56
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Message 48703 - Posted: 19 Jan 2018 | 17:03:52 UTC

For the third time within the recent past, a GIANNI task - this time:
gpcrmd_4mqt_complex_noNA_rep_3-GIANNI_CPXB-0-10-RND4540_0
failed after a few seconds.

stderr says:
ERROR: file mapmdx.cpp line 812: VDW table too large

Others were completed o.k.

Anyone else making same experience? What is "VDW table"?

Erich56
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Message 48898 - Posted: 11 Feb 2018 | 17:06:29 UTC

Another "... complex ... GIANNI..." task that failed, this time though after about 32.000 seconds:

gpcrmd_4oo9_complex_noNA_rep_3-GIANNI_CPXB-6-10-RND5783_5

stderr says:

# Simulation unstable. Flag 3 value 1
# The simulation has become unstable. Terminating to avoid lock-up
# The simulation has become unstable. Terminating to avoid lock-up (2)
# Attempting restart (step 6965000)
called boinc_finish


:-(

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Message 48899 - Posted: 11 Feb 2018 | 17:39:58 UTC - in response to Message 48703.

What is "VDW table"?


VDW probably means Van der Waals.

https://en.wikipedia.org/wiki/Van_der_Waals_force


# Simulation unstable. Flag 3 value 1
# The simulation has become unstable. Terminating to avoid lock-up
# The simulation has become unstable. Terminating to avoid lock-up (2)
# Attempting restart (step 6965000)


One possibility is you may need to clock back your GPU a bit.

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Message 48908 - Posted: 12 Feb 2018 | 9:40:13 UTC - in response to Message 48899.

Another "... complex ... GIANNI..." task that failed, this time though after about 32.000 seconds:

gpcrmd_4oo9_complex_noNA_rep_3-GIANNI_CPXB-6-10-RND5783_5

stderr says:
# Simulation unstable. Flag 3 value 1
# The simulation has become unstable. Terminating to avoid lock-up
# The simulation has become unstable. Terminating to avoid lock-up (2)
# Attempting restart (step 6965000)

One possibility is you may need to clock back your GPU a bit.

This workunit has failed on every host (including one of mine) with the same error message. It is very unlikely that 8 different GPUs (including known reliable ones) have the same condition which makes the workunit fail the same way. In this case the source of the error is the algorithm which checks the stability of the simulation probably set to an overly sensitive level.

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Message boards : Number crunching : ...complex...GIANNI_CPXB tasks failing right after start