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TGBT15A_915_99 - Detailed fftshift and scale tests for incoherent modes
Find best combination of fftshift and vegas.scale to eliminate/minimize FFT overflow artifacts and get good output levels from VEGAS.
Session begins at 09:45
Switched to Justin's VPM branch
Set iniitial fftshift to 0x5555555f and vegas.scale to 1000. Will use GUPPI when possible to verify data. Initial guppi.scale set to 1.5.
SB submitted at 09:47
VEGAS was slow to activate and SB aborted. Resubmitting at 09:51
VEGAS aborted again with message "failed to start HPC subprocess". Manager reports "hpc_process: unable to open pipe: No such device or address"
Restarting VEGAS manager on vegas-hpc1
Resubmitting SB at 09:57
Failed again. Manager logs seem to report an issue with registering the
. Calling Justin.
Justin will try to rebuild and reinstall the manager.
Resubmitting SB at 10:07
Still got an abort but trying to run scan anyway.
Scan #4 - No VEGAS data. GUPPI scale is high.
Still aborted on next scan. Maybe using GUPPI is the issue? Seems unlikely but will give it a try with just VEGAS.
Still failing after many attempts. Trying to run the VPM-TestManyModes SB, which ran yesterday.
Justin reverted the manager back to the previous version (no support for 32-channel modes). This worked yesterday, so let's see if it helps.
Well it started running, but not in pulsar mode...aborting.
Got it to configure for pulsar mode, but still aborted. Put guppi_daq in MONITOR and packets are flowing, so it doesn't seem to be the ROACH.
Will try resetting ROACH. That is the last thing I can think of.
No change. Confirmed that spec line modes run.
Tried a different fftshift value, in case that was doing something to the ROACH. No difference.
Trying to do the complete switch_vegas routine again. No difference.
Session was a complete wash. --
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Topic revision: r1 - 2017-06-29,
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