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From: | sumit kumar |
Subject: | Re: [Discuss-gnuradio] Expensive file write operation |
Date: | Fri, 30 Aug 2019 19:42:00 +0200 |
Hi Sumit,
Are you using a 1Gb transport to the X310?
The max data rate a 1Gb link can handle is ~25 MS/s @ sc16 OTW. With the two channels at 20 MS/s you're over this limit and would need to use 10Gb. If your laptop has a TB3/USB-C port, there are several TB3 to 10Gb adapters available.
Another observation -- if you switch the output type of the UHD Source block to be Complex int16 and then set your file sinks to have the data type Ints, you will cut the data rate in half that is being written to disk (complex 16bit Ints vs complex 32 bit floats).
Regards,
Nate TempleOn Fri, Aug 30, 2019 at 9:59 AM sumit kumar <address@hidden> wrote:Hi,_______________________________________________I am trying to capture RF data thru X310 from 2 channels and writing them to file using GNU Radio. But when I use a sampling rate of 20 MHz, packets start dropping badly.I have a very decent Laptop i7 8th Gen, SSD, 16 gb RAM. I also observed the CPU performance, it does not look stressed at all. I mean, none of the cores were reaching anywhere near to even 50%.Am I doing something wrong? For 10MHz sampling rate it is good, no overruns.I have attached my flowgraph, and the cpu performance screenshot.Regards--Sumit Kumar
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