Rolando, This is a shot in the dark but I’d suggest checking your MTU size hasn’t been changed during whatever updates/upgrades you alluded to in your original message. I recall having issues such as the one you described and it turned out to be that.
Good luck! From: Rolando Paz [mailto:flx...@gmail.com] Sent: 06 March 2018 18:50 To: casper@lists.berkeley.edu Subject: Re: [casper] Myricom 10G-PCIE-8A-C Hi Dan I placed a 64-bit counter directly at the input of 10G block, and then adjusted the accumulation length. The behavior was the same, it only works correctly with the accumulation length = 2048. The integration time of each package is 20ms corresponding to the accumulation length = 2048. Then I obtained the data through GULP, then I graph them and I obtained the attached graph. I think everything is working well? This only works with the accumulation length = 2048, below everything stops working. Regards 2018-03-06 11:46 GMT-06:00 Dan Werthimer <d...@ssl.berkeley.edu<mailto:d...@ssl.berkeley.edu>>: hi rolando, what is your packet rate? and how many bytes in each packet? i suggest you use tcpdump or wireshark or some other packet sniffer program to examine your packets, and see how fast they are coming in (look at the time stamps of each packet), and whether the data look correct... dan On Mon, Mar 5, 2018 at 9:49 PM, Rolando Paz <flx...@gmail.com<mailto:flx...@gmail.com>> wrote: Hi Dan After doing what you advised me, I managed to observe the following: When I adjust the accumulation length to 2048 everything works correctly, then I adjust the accumulation length to 1024 and everything continues to work fine, then I adjust the accumulation length to 512 and the PC stops receiving the UDP packets (totally) ... Then I go back to 1024 and I no longer get packets. Then I go back to 2048 and everything goes back to normal, then I adjust the value to 1024 and it works correctly. I no longer see UDP packets when I adjust the value to 512 ... Can it be a problem with my network card? Regards 2018-03-05 19:15 GMT-06:00 Dan Werthimer <d...@ssl.berkeley.edu<mailto:d...@ssl.berkeley.edu>>: hi rolando, it's possible that the problem you see is because your sample rate has changed or the valon's power output is too low for the adc. the valon display can sometimes mislead. i suggest you power cycle the valon, and re-program it with the settings you want (don't use the flash to boot it). and measure the valon output frequency and power level, (or check the packet rate coming from your spectrometer). we've seen the valon's flash get reprogrammed by accident. and check the valon output also, after you change the valon, or disconnect the clock from the adc, make sure to re-program the fpga: if you have a runt clock pulse when changing clock rates, the fpga can get into a wierd mode. dan On Mon, Mar 5, 2018 at 5:08 PM, Rolando Paz <flx...@gmail.com<mailto:flx...@gmail.com>> wrote: Hi Dan Right now I did another test with accumulation length = 1024, and it did not work ... then I changed it to 2048 and now it's the new value with which ROACH works ...something bad is happening. The settings of the 5008 valon can be seen in the attached image. The QUADC needs (https://casper.berkeley.edu/wiki/ADC4x250-8): Inputs Clock: 24-250MHz 50Ohm 0dBm According to what I see in the image "input_to_quadc.png" that I obtained with an oscilloscope, the signal that input to the quadc is -5.5dBm. Could this be the problem? and if this were the problem, why before everything worked well? Best Regards Rolando 2018-03-05 17:46 GMT-06:00 Dan Werthimer <d...@ssl.berkeley.edu<mailto:d...@ssl.berkeley.edu>>: hi rolando, are you dropping packets? have you used tcpdump or other packet sniffer code (eg: gulp...), to investigating what's going on when you change the integration time? is the number of packets/second correct for the integration time you set? if not, perhaps you accidently changed the sample clock to the adc so the integration time is shorter than before... best wishes, dan On Mon, Mar 5, 2018 at 3:39 PM, Rolando Paz <flx...@gmail.com<mailto:flx...@gmail.com>> wrote: Hello I'm having a problem with my 10G ethernet card (I think)... everything was working fine the last year. Yesterday I turned on the ROACH again and now I could not get data with the original settings (accumulation length= 256). Maybe the drivers of the Myricom 10G-PCIE-8A-C card were updated automatically in my ubuntu 16.04LTS :( These are the original settings: Notes: a) ROACH1 design, 4 inputs with QUADC b) "fft_biplex_real_2x" block was used FFT points (FFT size) = 2048 Samples per clock = 1 FFT clock cycles = 2048 Accumulation Length = 256 FPGA clock (MHz) = 200 Integration Time = 0.00262144 But now it only works from: FFT points (FFT size) = 2048 Samples per clock = 1 FFT clock cycles = 2048 Accumulation Length = 1024 FPGA clock (MHz) = 200 Integration Time = 0.01048576 Before I managed to obtain data with a time of integration of 0.00262144, and now only from 0.01048576 What could happen? Regards Rolando -- You received this message because you are subscribed to the Google Groups "casper@lists.berkeley.edu<mailto:casper@lists.berkeley.edu>" group. 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