Re: [Discuss-gnuradio] Setting buffer size when using UHD
On 09/22/2010 07:17 AM, Per Zetterberg wrote: Is the receiver buffer size in bytes or samples ? bytes Its a direct proxy for SO_REVBUF socket option. http://www.boost.org/doc/libs/1_41_0/doc/html/boost_asio/reference/basic_datagram_socket/receive_buffer_size.html http://msdn.microsoft.com/en-us/library/ms740476%28VS.85%29.aspx -Josh From: discuss-gnuradio-bounces+perz=kth...@gnu.org [discuss-gnuradio-bounces+perz=kth...@gnu.org] on behalf of Josh Blum [j...@joshknows.com] Sent: Monday, September 20, 2010 5:07 PM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Setting buffer size when using UHD The buffer size setting is used across all motherboards in the mimo setup. So, if specified, its only specified once: http://www.ettus.com/uhd_docs/manual/html/usrp2.html#resize-the-send-and-receive-buffers If this is linux, I recommend setting sysctl and letting UHD automatically pick the size. sudo sysctl -w net.core.rmem_max=5000 -Josh On 09/20/2010 03:36 AM, Per Zetterberg wrote: Hi All, How do I set the buffer size when using uhd::usrp::mimo_usrp ? BR/ Per ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
RE: [Discuss-gnuradio] Setting buffer size when using UHD
Is the receiver buffer size in bytes or samples ? From: discuss-gnuradio-bounces+perz=kth...@gnu.org [discuss-gnuradio-bounces+perz=kth...@gnu.org] on behalf of Josh Blum [j...@joshknows.com] Sent: Monday, September 20, 2010 5:07 PM To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] Setting buffer size when using UHD The buffer size setting is used across all motherboards in the mimo setup. So, if specified, its only specified once: http://www.ettus.com/uhd_docs/manual/html/usrp2.html#resize-the-send-and-receive-buffers If this is linux, I recommend setting sysctl and letting UHD automatically pick the size. sudo sysctl -w net.core.rmem_max=5000 -Josh On 09/20/2010 03:36 AM, Per Zetterberg wrote: > Hi All, > > How do I set the buffer size when using uhd::usrp::mimo_usrp ? > > BR/ > Per > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Setting buffer size when using UHD
On 09/21/2010 01:30 AM, Per Zetterberg wrote: I read the page you refer to but I don't understand. Is this correct ? uhd::device_addr_t dev_addr; dev_addr["addr"] = "192.168.10.11 192.168.20.11"; dev_addr["addr"] = "192.168.10.11 192.168.20.11"; dev_addr["recv_buff_size"] = "1e4"; d_mdev=uhd::usrp::mimo_usrp::make(dev_addr); That should work, however, that is a very small buffer. Expect overflow. If this is linux, I recommend setting sysctl and letting UHD automatically pick the size. sudo sysctl -w net.core.rmem_max=5000 Yes. But then I need to do change this value when depending on which application I about to run or ... ? 50MB is half a second of buffering at full rate. The default behavior of the UHD is to resize recv buffers to 50 MB. I think that is sufficient for most applications. -Josh ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Setting buffer size when using UHD
I read the page you refer to but I don't understand. Is this correct ? uhd::device_addr_t dev_addr; dev_addr["addr"] = "192.168.10.11 192.168.20.11"; dev_addr["addr"] = "192.168.10.11 192.168.20.11"; dev_addr["recv_buff_size"] = "1e4"; d_mdev=uhd::usrp::mimo_usrp::make(dev_addr); > If this is linux, I recommend setting sysctl and letting UHD > automatically pick the size. > > sudo sysctl -w net.core.rmem_max=5000 > > > Yes. But then I need to do change this value when depending on which application I about to run or ... ? BR/ Per On Mon, 2010-09-20 at 08:07 -0700, Josh Blum wrote: > The buffer size setting is used across all motherboards in the mimo > setup. So, if specified, its only specified once: > http://www.ettus.com/uhd_docs/manual/html/usrp2.html#resize-the-send-and-receive-buffers > > If this is linux, I recommend setting sysctl and letting UHD > automatically pick the size. > > sudo sysctl -w net.core.rmem_max=5000 > > -Josh > > On 09/20/2010 03:36 AM, Per Zetterberg wrote: > > Hi All, > > > > How do I set the buffer size when using uhd::usrp::mimo_usrp ? > > > > BR/ > > Per > > ___ > > Discuss-gnuradio mailing list > > Discuss-gnuradio@gnu.org > > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Setting buffer size when using UHD
The buffer size setting is used across all motherboards in the mimo setup. So, if specified, its only specified once: http://www.ettus.com/uhd_docs/manual/html/usrp2.html#resize-the-send-and-receive-buffers If this is linux, I recommend setting sysctl and letting UHD automatically pick the size. sudo sysctl -w net.core.rmem_max=5000 -Josh On 09/20/2010 03:36 AM, Per Zetterberg wrote: Hi All, How do I set the buffer size when using uhd::usrp::mimo_usrp ? BR/ Per ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] Setting buffer size when using UHD
Hi All, How do I set the buffer size when using uhd::usrp::mimo_usrp ? BR/ Per ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
