Craig G., Bruno, Jonathan, Leon, Jan, Marianna, Andrey, Yuri, Luke, Andrew and Martin (taking notes)
- Number of Doublets (in adjacent planes) with an ADC sum above threshold are sent to GT together with the time stamp.
- Alec points out that Michel electron are not rejected by this.
- Slicing still needs to be finalized:
- based on Alec's slicer
- see Jan's CalTech talk for first effort on this
- 4 hits with 4 TDC
- Jan asks about the millislice duration (5 ms)
- Leon points out that this is a DAQ configuration parameter and can in principle be changed.
- Alec notes that this is defined in the GT.
- I asked about the rate of NSNPackedMessages and Jan explained that the SN DDT module collects 10 messages and then sends them as an array.
- takes us from 200 Hz (every milliblock) to 20 Hz (1 per 10 milliblocks)
- Andrew points out that Zukai's cutoff might be as large as 3 seconds.
- Yuri is surprised that the UpMu modules take so long.
- He will follow up on this.
- Andrew explained that BNEVB is supposed to be on its own 2 threads, so that the default scheduler does not interfere with its operation.
- Leon proposes that we test the DAQ with and without CPU migration.
- If there is not noticeable difference without the CPU sets, we can run without them.
- Perhaps we can simply tear down the CPU sets on some (or all) of the hosts. That way the migration would simply fail and we would not have to edit a bunch of start scripts.
- An additional sleep will not solve the DDT process migration issue because the longer we sleep, the more CPU will be used on the system set and crowd out DDS.
- Chris can have this trigger at less than 10 Hz, 75 Hz is too much.
- Let's start with a prescale of 10 or 100 and see what the rate looks like. We can then ease off on the prescale.
- Chris calculates the moon position for every event.
- Alec suggests that we just calculate it once a minute.
- Let's see what the timing of this module looks like first and if it is bad, we can optimize more.
- I told Chris that if he is under 100 ms on a VM, there should not be a problem.