Trac May 2014

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138 discussions

[Einstein Toolkit] #1614: introduce "damage region" to speed up SYNC after restriction
by Einstein Toolkit 07 May '14

07 May '14

#1614: introduce "damage region" to speed up SYNC after restriction -------------------------+-------------------------------------------------- Reporter: rhaas | Owner: eschnett Type: enhancement | Status: new Priority: major | Milestone: Component: Carpet | Version: development version Keywords: | -------------------------+-------------------------------------------------- after a restriction one needs to apply boundary conditions and SYNC the grid functions. This SYNCS (as far as I know) the whole grid function. However for a restriction only a (hopefully small) number of grid points should be affected. It may thus make sense if Carpet were to exchange only the data that needs to be exchanged. This seems to be not quit trivial to implement though since one has to translate from the send region to the recv region in the sendrecvs. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1614> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1602: captcha not working anymore
by Einstein Toolkit 07 May '14

07 May '14

#1602: captcha not working anymore ----------------------------------+----------------------------------------- Reporter: rhaas | Owner: Type: defect | Status: new Priority: major | Milestone: Component: EinsteinToolkit trac | Version: development version Keywords: Captcha | ----------------------------------+----------------------------------------- it seems as if the Captcha that gets triggered by potential spam is no longer triggered and the user is just presented by a page that claims his comment is spam. This just happened to Bela Szilagyi whom we had asked for input on ticket #1600. Please if someone at LSU would take a look at this this would be very helpful. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1602> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1583: Carpet default poison value should not be NaN
by Einstein Toolkit 05 May '14

05 May '14

#1583: Carpet default poison value should not be NaN -------------------------+-------------------------------------------------- Reporter: hinder | Owner: eschnett Type: enhancement | Status: new Priority: optional | Milestone: Component: Carpet | Version: development version Keywords: | -------------------------+-------------------------------------------------- Carpet initialises Cactus variables to NaN as this is a quantity which is likely to be noticed. However, this makes it impossible to know when you see a NaN whether you have a programming error (accessing uninitialised memory) or a numerical problem (numerical solution has blown up). I usually set the carpet poison value to something else; a value like 10^230 is just as likely to be noticed as a NaN, and when you see exactly that value, you know that you are looking at uninitialised data, rather than a computation which went wrong. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1583> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1611: Support Valgrind in Carpet/CarpetLib's poison code
by Einstein Toolkit 05 May '14

05 May '14

#1611: Support Valgrind in Carpet/CarpetLib's poison code -------------------------+-------------------------------------------------- Reporter: rhaas | Owner: eschnett Type: enhancement | Status: new Priority: minor | Milestone: Component: Carpet | Version: development version Keywords: | -------------------------+-------------------------------------------------- Valgrind offers client requests (http://valgrind.org/docs/manual/mc- manual.html#mc-manual.clientreqs) that can be used to flag a region of memory as undefined (VALGRIND_MAKE_MEM_UNDEFINED). It may be useful for Carpet to mark regions that it poisons as undefined so that Valgrind triggers on them. Right now poisoning "initializes" the data as far as valgrind is concerned. Also cycling timelevels does not mark them as invalid as far as valgrind is concerned. I would envision an ExternalLibrary valgrind that provides an interface that Carpet can use (or just have Carpet check HAVE_VALGRIND). -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1611> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1603: CarpetProlongateTest/test_o9 is failing on several machines
by Einstein Toolkit 05 May '14

05 May '14

#1603: CarpetProlongateTest/test_o9 is failing on several machines --------------------+------------------------------------------------------- Reporter: hinder | Owner: eschnett Type: defect | Status: new Priority: major | Milestone: ET_2014_05 Component: Carpet | Version: development version Keywords: | --------------------+------------------------------------------------------- CarpetProlongateTest/test_o9 is failing on Gordon, Mike and Redshift. On Gordon, the differences are {{{ carpetprolongatetest::difference.d.asc: substantial differences significant differences on 1 (out of 206) lines maximum absolute difference in column 13 is 1.07288360595703e-06 maximum absolute difference in column 14 is 6.98491930961609e-10 maximum relative difference in column 13 is 1.12625729345722e-12 maximum relative difference in column 14 is 3 (insignificant differences on 19 lines) carpetprolongatetest::difference.x.asc: differences below tolerance on 26 lines carpetprolongatetest::difference.y.asc: differences below tolerance on 26 lines carpetprolongatetest::errornorm..asc: differences below tolerance on 1 lines carpetprolongatetest::scalar.d.asc: differences below tolerance on 13 lines carpetprolongatetest::scalar.x.asc: differences below tolerance on 6 lines carpetprolongatetest::scalar.y.asc: differences below tolerance on 4 lines }}} and on the other machines the results are similar. test.ccl contains {{{ TEST test_o7 { ABSTOL 2.0e-11 } TEST test_o9 { ABSTOL 5.0e-10 } TEST test_o11 { ABSTOL 3.0e-8 } }}} Higher order prolongation probably leads to more amplification of roundoff differences, which is why the absolute tolerances listed here increase with prolongation order. On Redshift, which uses -Ofast with gcc, the maximum absolute differences in columns 13 and 14 are just marginally above the tolerance of 5e-10: {{{ maximum absolute difference in column 13 is 9.31322574615479e-10 maximum absolute difference in column 14 is 6.98491930961609e-10 maximum relative difference in column 13 is 9.77653900570505e-16 maximum relative difference in column 14 is 3 }}} However on Gordon and Mike, the column 13 absolute difference is 1e-6, which presumably means the data is large, so the relative tolerance will come into play. The default relative tolerance is 1e-12, and the difference in column 13 is marginally above this. Gordon: {{{ maximum absolute difference in column 13 is 1.07288360595703e-06 maximum absolute difference in column 14 is 6.98491930961609e-10 maximum relative difference in column 13 is 1.12625729345722e-12 maximum relative difference in column 14 is 3 }}} Mike: {{{ maximum absolute difference in column 13 is 1.07288360595703e-06 maximum absolute difference in column 14 is 6.98491930961609e-10 maximum relative difference in column 13 is 1.12625729345722e-12 maximum relative difference in column 14 is 3 }}} Should we increase both the relative and absolute tolerances for this test to 1e-11? I believe that would make the test pass on all three machines. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1603> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1591: Simfactory: add -Wall and '-warn all' options to warning flags for intel compilers
by Einstein Toolkit 05 May '14

05 May '14

#1591: Simfactory: add -Wall and '-warn all' options to warning flags for intel compilers ------------------------+--------------------------------------------------- Reporter: bmundim | Owner: eschnett Type: defect | Status: new Priority: major | Milestone: ET_2014_05 Component: SimFactory | Version: development version Keywords: | ------------------------+--------------------------------------------------- If you add the flag '-warn all' to F77_WARN_FLAGS and F90_WARN_FLAGS the compiler catches a subtle error (compiler error #8284) related to subroutine and function calls in Fortran: {{{ https://software.intel.com/en-us/forums/topic/342615 https://software.intel.com/en-us/blogs/2009/03/31/doctor-fortran-in-ive- come-here-for-an-argument }}} Currently grhydro won't compile if we turn on that flag. I suggest to update all configurations in simfactory using intel compilers with the flag mentioned above and fix any issue related to this bug on the ET thorns. Any thoughts on my proposal? -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1591> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1606: MoL multi-rate support is broken
by Einstein Toolkit 01 May '14

01 May '14

#1606: MoL multi-rate support is broken -----------------------------------+---------------------------------------- Reporter: rhaas | Owner: Type: defect | Status: new Priority: major | Milestone: Component: EinsteinToolkit thorn | Version: development version Keywords: MoL | -----------------------------------+---------------------------------------- MoL does not do the initial copy of the past timelevel (which the driver just rotated into _p) to the current timelevel. Hence the current timelevel retains the values it had when it was the past-past (assuming three levels) timelevel (or poison if poisoning is used). The attached patches do (1) add the required initial_copy and (2) add support for MoL::initial_data_is_crap to the slow sector. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1606> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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[Einstein Toolkit] #1601: test system ignores nprocs unless MPI is found
by Einstein Toolkit 01 May '14

01 May '14

#1601: test system ignores nprocs unless MPI is found --------------------+------------------------------------------------------- Reporter: rhaas | Owner: Type: defect | Status: new Priority: minor | Milestone: Component: Cactus | Version: development version Keywords: | --------------------+------------------------------------------------------- the test system script RunTestUtils.pl checks if the configuration is MPI enabled by looking into some build files (see function ParseExtras and its use of file $config/bindings/Configuration/Capabilities/cctki_MPI.h). However in line 549 {{{ if ($have_mpi) { $config_data->{'NPROCS'} = &defprompt(' Enter number of processors ($nprocs)', $nprocs); } else { print "No MPI available\n"; if ($nprocs > 1) { die("Cannot run on $nprocs processes without an MPI implementation\n"); } } }}} it only sets $config_data->{NPROCS} if MPI was found and leaves it undefined otherwise. This seems to confuse later parts of the script which try to decide which tests to run and one gets eg {{{ Summary for configuration sim Time -> Mon Apr 28 21:35:38 PDT 2014 Host -> nid27637 Processes -> User -> rhaas Total available tests -> 287 Unrunnable tests -> 133 Runnable tests -> 154 Total number of thorns -> 209 Number of tested thorns -> 52 Number of tests passed -> 149 Number passed only to set tolerance -> 95 Number failed -> 5 }}} and {{{ Tests missed for different number of processors required: checkpointML-EE in AHFinderDirect (EinsteinAnalysis/AHFinderDirect/test/checkpointML-EE.par) Requires 1 processors test_cc_o5 in CarpetProlongateTest (CarpetExtra/CarpetProlongateTest/test/test_cc_o5.par) Requires 2 processors }}} I suggest setting congif_data->{NPROCS} to 1 if no MPI is found. Note that this really only happens if one manages to compile without MPI (which implies no Carpet) or (as in my case) uses simfactory (with 1 process) but has rsync filter rules that prevent it from copying all of configs/sim to the simulation base dir. -- Ticket URL: <https://trac.einsteintoolkit.org/ticket/1601> Einstein Toolkit <http://einsteintoolkit.org> The Einstein Toolkit

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Trac May 2014