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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] 802.11 transceiver issue |
Date: | Thu, 31 Mar 2016 10:13:44 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 |
Hi Abhinav, On 31.03.2016 02:42, Abhinav Jadon
wrote:
Sooo, ok. My head was stuck on UHD/the USRP being a problem here, but: "asynchronous message buffer overflowing, dropping message" is a GNU Radio warning! So what happens here is that messages are sent to a block that's not processing them fast enough, and at some point, the message buffer just gets too big. There's basically two candidates for this, because your message passing chain is: Message Strobe-> OFDM MAC->OFDM Mapper(->stream) so my guess is that this happens at the OFDM Mapper, because that is the block whose message processing rate is limited by the amount of samples it can produce, which is defined by how fast the USRP sink consumes those, in the end. Quick test: Take the "Message Strobe -> OFDM MAC -> OFDM Mapper" and just attach a "->Probe Rate->Message Debug". How many items per second do your generate with the settings you use when you get a lot of the "async mess. buff. overflow" warnings?" Best regards, Marcus
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