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- we think gpu can write to kcu, but Jeremy will try to confirm that this is really the case. we think kcu to gpu is broken.
- Mudit will work on TDet firmware
- Jeremy and TID will use rdsrv419
- LCLS should find another machine where we can control the root-complex topology better. lab3 daq-tst-dev06?
- could be that the CPU datadev driver is incompatible with the GPU datadev driver
- should probably find a different machine. a fee-alcove machine?
- chris and gabriel on vacation July 6-20
- Jeremy unavailable July 8-10
July 8, 2024
- Jeremy and CPO are on vacation
- Larry urges to move axi-stream-drivers forward to v4.1.0 rather than working with v4.0.0
- Mudit has created v4.2.0 (CPU/GPU DMA switch?) but it has not been tested with hardware yet
- It is unclear whether Jeremy has gotten a baseline working system yet
- Ryan agreed that my hacks of
test_dma.cu
and_Root.py
to target/dev/datagpu_1
should be sufficient - Ryan would like us all to work on one machine and get confidence in it before we branch out to different machines
- I suggested that we could pull out the current
/dev/datagpu_0
from dev06 so that the KCU of interest becomes _0- Ryan & Larry suggested pullling the other ones out as well
- Ryan suggests setting
iommu=no
in the BIOS as well as on the command line- I later found that there is no iommu parameter in dev06's BIOS
- There's no experience with multiple KCU cards and the datagpu driver - it is untested
- Larry is aware of some issue with the usual datadev driver and multiple KCUs
- Work on rdsrv419
- A GPU is installed
- CUDA is installed
- A KCU is installed and has PCIe slot 03:00
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