Wolfgang, > > We are having trouble with the FE_DGQ<3> element (no problem occurs in > > 2d). > > I don't see this on my 48-core system. Is the only modification to step-12 > the > use of 3d?
Yes. > Guido changed something in the class/function you cite recently. Are you on > the latest svn revision? We were able to run the same code (or rather the constructor of FE_DGQ<3>(0), which is not working now) about a week ago. The problem seems to be Guido's commit 22688 where he removed some locks and introduced nested tasks (which seem to be the problem, not the removed locks). If we undo the patch 22688, we get it running again. But the tests (further down) still fail, and this does not appear to be a final solution. We have tested this on two systems and we got it only on one of them (Opteron from 2007, 4 cores). It also did not depend on whether the gcc-4.5 threads were used or the ones from boost. The error might be related to the problem that appears with the testsuite on this system: There, the tests thread_validity_07, 08 and 09 fail, which are of similar structure as the part in FETools::compute_embedding_matrices that fails. These tests have failed already half a year ago, but we have never really bothered because all user programs ran nicely. =====Running======= thread_validity_07/exe --------------------------------------------------------- In one of the sub-threads of this program, an exception was thrown and not caught. Since exceptions do not propagate to the main thread, the library has caught it. The information carried by this exception is given below. --------------------------------------------------------- Exception message: Exception type: St12system_error Aborting! --------------------------------------------------------- =====Running======= thread_validity_08/exe terminate called without an active exception /bin/sh: line 1: 19666 Aborted ./thread_validity_08/exe make: *** [thread_validity_08/output] Error 1 Best, Katharina and Martin _______________________________________________ dealii mailing list http://poisson.dealii.org/mailman/listinfo/dealii
