From: Kurtis H. <khe...@cs...> - 2012-03-13 22:06:58
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They actually disabled their second core, so it's not a processor affinity problem. On Mon, Mar 12, 2012 at 11:59 PM, Alexander Chemeris <ale...@gm...> wrote: > Kurtis, > > Just to reduce a set of potential reasons for this problem. Could you > ask your students to set CPU affinity on transceiver before running > it? To make sure it doesn't switch CPU cores in the middle of > processing. CPU cores have different clocks and, say, day of time may > be slightly different on one core and another. > > PS Am I correct that the issue is only seen with B100 USRPs? > > On Tue, Mar 13, 2012 at 05:32, Kurtis Heimerl <khe...@cs...> wrote: >> My students are now reporting this "loss of monotonic time" issue. It >> seems to be a software issue, given that the same hardware (B100) >> works on one laptop and not on another. Can anyone else who has seen >> this issue report your OS/CPU/USB Version information and see if we >> can figure out a pattern? >> >> Thanks. >> >> >> ---------- Forwarded message ---------- >> From: Amil <am...@gm...> >> Date: Mon, Mar 12, 2012 at 1:48 PM >> Subject: OpenBTS error: UHD loss of monotonic time >> To: Kurtis Heimerl <khe...@cs...> >> Cc: Fadi Haddad <fa...@gm...>, Shirley Wu >> <shi...@gm...>, Patrick Tiet <tie...@gm...> >> >> >> Hi Kurtis, >> >> We just installed OpenBTS on another laptop (that all of us in the >> group can share). >> However, we are getting the error of: >> >> OpenBTS> ALERT 3052829552 UHDDevice.cpp:599:check_rx_md_err: UHD: Loss >> of monotonic time >> ALERT 3052829552 UHDDevice.cpp:599:check_rx_md_err: UHD: Loss of monotonic time >> ALERT 3052829552 UHDDevice.cpp:599:check_rx_md_err: UHD: Loss of monotonic time >> ALERT 3052829552 UHDDevice.cpp:728:writeSamples: UHD: Device send timed out >> ALERT 3052829552 UHDDevice.cpp:729:writeSamples: UHD: Version >> 003.004.000-307-gb61f4ad6 >> ALERT 3052829552 UHDDevice.cpp:730:writeSamples: UHD: Unrecoverable >> error, exiting... >> EMERG 3069651824 OpenBTS.cpp:131:startTransceiver: Transceiver quit >> with status 65280. Exiting. >> >> >> We basically followed the same steps on installing OpenBTS on this >> laptop, but this laptop is slower (EEE intel atom n280 1.66ghz dual >> core). >> Is it because our laptop is too slow? >> >> Ubuntu 10.04 on this laptop (vs 11.04 on the working one). >> >> Thanks, >> Amil >> >> ------------------------------------------------------------------------------ >> Keep Your Developer Skills Current with LearnDevNow! >> The most comprehensive online learning library for Microsoft developers >> is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, >> Metro Style Apps, more. Free future releases when you subscribe now! >> http://p.sf.net/sfu/learndevnow-d2d >> _______________________________________________ >> Openbts-discuss mailing list >> Ope...@li... >> https://lists.sourceforge.net/lists/listinfo/openbts-discuss > > > > -- > Regards, > Alexander Chemeris. |