Hi Ken, Here's the repository of the tcpborphserver3: https://gitlab.ras.byu.edu/alpaca/casper/katcp/-/tree/master/tcpborphserver3
There are a number of branches that support e.g. setting the RFDC NCO. We will have a similar need to stream lowish-speed polarimetry data using the 1 GbE interface. I plan not to do the data readout using KATCP but mapping the BRAM addresses directly to Julia data structures, forming HDF5 files in ramdisk and copying them to a NFS mounted server disk. Let's see how it goes ;-), I have to design the analog interface first :-D. Cheers and good luck, Kaj On Sun, 8 Dec 2024 at 18:53, Ken Semanov <shapkiqua...@gmail.com> wrote: > I need to know everything about what is happening in the PS side with the > katcp server. Otherwise I cannot email the author of the katcp package to > ask questions about it. He will need to know exactly what we are doing > with CASPERized Linux. This is already going to be difficult to > communicate to him as it is. > > On Sunday, December 8, 2024 at 11:46:07 AM UTC-5 Ken Semanov wrote: > >> The Python version of the server side of KATCP is shown below. (there >> may be a C version somewhere) >> . >> https://github.com/ska-sa/katcp-python/blob/master/katcp/server.py >> >> This uses futures from concurrent.futures and tornado futures. As some >> may already know, "threading" in Python is fake. All threads stall all >> other threads due to a Global Interpreter Lock (GIL). This is exactly >> the behavior that I am seeing from network speed tests. One of my own >> processes can retrieve from a Snapshot at 2.1 Megabytes/sec. However, >> for 8 concurrent processes, I only see 6.1 Megabytes/sec. It is exactly >> as if the parallel connections refuse to stack up correctly. If the >> CASPERized Linux on the PS of the board side is running Python Katcp (and >> not the C version) then it would be stalling connections until the GIL >> allows them into the single thread-of-execution. >> >> Can anyone on this forum confirm any of this? What is happening on the >> CASPERized Linux image? Where could I see this for myself? What >> processes in ps aux might I see related to katcp servers on the PS side? >> >> >> >> >> On Sunday, December 8, 2024 at 12:26:26 AM UTC-5 Ken Semanov wrote: >> >>> Is there a way I could nose around the katcp server on the board side in >>> order to see how it is configured? >>> >>> Could I reconfigure this server after booting into the board? >>> >>> I am using a CASPERized image on a ZCU216. I am migrating data out of >>> snapshot blocks over network. After several network tests, it appears that >>> the katcp on the board side (PS) is artificially limited to 3 or 4 >>> simultaneous network connections over RJ45 ethernet. My use-case needs >>> this to be more like 8 to 16 connections. I may also need to change the >>> packet size. >>> >>> Thanks. >>> >> -- > You received this message because you are subscribed to the Google Groups " > casper@lists.berkeley.edu" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to casper+unsubscr...@lists.berkeley.edu. > To view this discussion visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/386ccab3-d2a3-4507-9542-1b4889b473f3n%40lists.berkeley.edu > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/386ccab3-d2a3-4507-9542-1b4889b473f3n%40lists.berkeley.edu?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "casper@lists.berkeley.edu" group. To unsubscribe from this group and stop receiving emails from it, send an email to casper+unsubscr...@lists.berkeley.edu. To view this discussion visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CADpJ3s1PpjiUMZ1PGTNWDk%3DhY%2BFGPuCtn8b4VtOq8d9UgV8Qgg%40mail.gmail.com.
