Hi Jan, you pointer to the 4a2cb7b817 help! We had -lrtdk before - lpthread -lpthread_rt in our compile statement. Just in 2.4.8, this seems to make no difference.
-Stefan On Nov 2, 2009, at 10:42, Stefan Schaal wrote: > Hi Jan, > > we updated the git on Oct. 29 (3 days ago). We do use the posix > skin, i.e., we use the xeno-config --posix-ldflags. This worked all > fine without mode switches under Xenomai 2.4.8. My git does include > 4a2cb7b817. I will try to reproduce the error in a test program. > > -Stefan > > > On Nov 1, 2009, at 23:43, Jan Kiszka wrote: > >> Stefan Schaal wrote: >>> Hi, >>> >>> I am working with the latest xenomai-head tree (we need analogy for >>> our NI board ...). Under Xenomai 2.4.8 our code did not have any >>> mode >>> switches. Using the xenomai-head, we get a lot of mode switches. >>> Using >>> he backtrace_symbols_fd, we get print-outs like: >>> >>> >>> xsimulation[0x808553b] >>> [0xffffe400] >>> /usr/xenomai/lib/librtdk.so.0(assert_nrt+0x85)[0xb7fa2ea5] >>> /usr/xenomai/lib/librtdk.so.0(__wrap_clock_gettime+0x17)[0xb7fa2ef7] >>> xsimulation[0x807cd16] >>> xsimulation[0x807d7fb] >>> /usr/xenomai/lib/libnative.so.3[0xb7fab689] >>> /lib/tls/i686/cmov/libpthread.so.0[0xb7f824ff] >>> /lib/tls/i686/cmov/libc.so.6(clone+0x5e)[0xb7e8f49e] >>> >>> Which indicates that the wrapper for clock_gettime causes this >>> trouble, which is also confirmed by commenting clock_gettime out, >>> and >>> the mode switches disappear. >>> >>> Maybe something that needs fixing? >> >> Do you wrap & link against the POSIX library, ie. use that skin as >> well? >> If not, your code is actually using clock_gettime incorrectly as it >> then >> falls back to the Linux service which can trigger syscalls (or even >> deadlocks when the TSC is used). >> >> If you do use libpthread_rt, then my next question is if your work is >> based on today's git head or some older version not including >> 4a2cb7b817. >> >> Jan >> > > _______________________________________________ Xenomai-core mailing list Xenomaifirstname.lastname@example.org https://mail.gna.org/listinfo/xenomai-core