On Sunday 09 March 2008 14:38, Bart Van Assche wrote: > Hello, > > As far as I understood the libgomp source code directly, libgomp has > its own barrier implementation based on the futex system call. This > means that if I want to support OpenMP in DRD, I have to intercept the > futex system call.
sys_futex is only called (iow, the kernel is only involved) when a lock is contended. Since that is in general very rare, monitoring sys_futex will not work as you will miss most inter-thread dependencies. > Is there a better way than adding calls to > appropriate tracking functions in PRE(sys_futex) and POST(sys_futex) > (defined in coregrind/m_syswrap/syswrap-linux.c) ? Patch libgomp as described in the README in the tarball and make sure you configure the gcc build with --disable-linux-futex. J ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Valgrind-developers mailing list Valgrind-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-developers
