Dear Casperite: We have been deployed a 7(actually 8) antenna packetized correlator on Mauna Loa Hawaii. Running at 2.24GHz clock, that means 8.96 G bits per second for each 10G ethernet. The packet size is 2K. There are 8 sets of ROACH2 as F engines, the other 8 sets of ROACH2 as X engines. Data packets from F to X looks fine, the problem of lost packets is the integration data from X engine to the computer. The 10G yellow blocks in X engines handle the incoming data packets from F engine at the data rate of 8.96 Gbps, and output the integration data to PC, the outgoing data rate depends on the integration time, usually it is longer than 0.5 second. The syndrome is that packets lost happened by specific X engines after 10,20 minutes or couple of hours. Once it happened, we reset all the 10G yellow blocks in F and X, then the system revived.
I have no idea about the 10G ethernet yellow block. Any comments of suggestions are highly welcome. best homin jiang -- 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 post to this group, send email to casper@lists.berkeley.edu.
