Re: [Xenomai-core] lots of mode switches in xenomai-head tree?
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] [0xe400] /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 Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] lots of mode switches in xenomai-head tree?
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] [0xe400] /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 Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] lots of mode switches in xenomai-head tree?
Stefan Schaal wrote: 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. Do you use the wrap-link.sh script, or is this order change unrelated? -- Gilles. ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
[Xenomai-core] lots of mode switches in xenomai-head tree?
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] [0xe400] /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? Best wishes, -Stefan ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
Re: [Xenomai-core] lots of mode switches in xenomai-head tree?
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] [0xe400] /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 signature.asc Description: OpenPGP digital signature ___ Xenomai-core mailing list Xenomai-core@gna.org https://mail.gna.org/listinfo/xenomai-core
