[OMPI users] Sending string causes memory errors

Hello, using OpenMPI 1.10.2 and valgrind 3.11.0 I try to use the code below to send a c++ string. It works fine, but running through valgrind gives a lot of memory errors, invalid read of size... What is going wrong there? Valgrind output, see below. Thanks! Florian // Compile with: mpicxx

Re: [OMPI users] Sending string causes memory errors

joke or didn't I understand? Best, Florian > Cheers, > > Gilles > > PS if it works, do not jump to the erroneous conclusion valgrind likes > French and dislikes German ;-) > > On Wednesday, March 2, 2016, Florian Lindner wrote: > > > Hello, > >

Re: [OMPI users] Sending string causes memory errors

errors, rerun with: -v ==5324== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0) Am Donnerstag, 3. März 2016, 14:53:24 CET schrieb Gilles Gouaillardet: > I was unable to reproduce this in my environment. > > here is a slightly modified version of your test program. > bu

Re: [OMPI users] Sending string causes memory errors

C=/usr/bin/gfortran \ LDFLAGS="$LDFLAGS -Wl,-z,noexecstack" make see https://projects.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/openmpi Any more ideas? Best, Florian > > > > On Mar 2, 2016, at 9:51 AM, Florian Lindner

Re: [OMPI users] Sending string causes memory errors

recipe. Best and thanks! Florian > > Cheers, > > Gilles > > On Thursday, March 3, 2016, Florian Lindner wrote: > > > I am still getting errors, even with your script. > > > > I will also try to modified build of openmpi that Jeff suggested. > &g

[OMPI users] Can't connect using MPI Ports

Hello, I'm working on a sample program to connect two MPI communicators launched with mpirun using Ports. Firstly, I use MPI_Open_port to obtain a name and write that to a file: if (options.participant == A) { // A publishes the port if (options.commType == single and rank == 0) ope

Re: [OMPI users] Can't connect using MPI Ports

Am 03.11.2017 um 16:18 schrieb r...@open-mpi.org: > What version of OMPI are you using? 2.1.1 @ Arch Linux. Best, Florian ___ users mailing list users@lists.open-mpi.org https://lists.open-mpi.org/mailman/listinfo/users

Re: [OMPI users] Can't connect using MPI Ports

name and Lookup_name or exchanging the information using files (or command line or stdin) shouldn't have any impact on the connection (Connect / Accept) itself. Best, Florian > Ralph > >> On Nov 3, 2017, at 11:23 AM, Florian Lindner wrote: >> >> >> Am

Re: [OMPI users] Can't connect using MPI Ports

Am 05.11.2017 um 20:57 schrieb r...@open-mpi.org: > >> On Nov 5, 2017, at 6:48 AM, Florian Lindner > <mailto:mailingli...@xgm.de>> wrote: >> >> Am 04.11.2017 um 00:05 schrieb r...@open-mpi.org <mailto:r...@open-mpi.org>: >>> Yeah, there isn’t any

Re: [OMPI users] Can't connect using MPI Ports

>> The MPI Ports functionality (chapter 10.4 of MPI 3.1), mainly consisting of >> MPI_Open_port, MPI_Comm_accept and >> MPI_Comm_connect is not usuable without running an ompi-server as a third >> process? > > Yes, that’s correct. The reason for moving in that direction is that the > resource m

[OMPI users] Setting mpirun default parameters in a file

Hello, a recent openmpi update on my Arch machine seems to have enabled --nooversubscribe, as described in the manpage. Since I regularly test on my laptop with just 2 physical cores, I want to set --oversubscribe by default. How can I do that? I am also a bit surprised, that openmpi takes the

Re: [OMPI users] Setting mpirun default parameters in a file

; Regardless, you can have Open MPI use hyperthreads by default (instead of > cores) with the mpirun option --use-hwthread-cpus. > > > >> On Jan 10, 2018, at 10:48 AM, r...@open-mpi.org wrote: >> >> Set the MCA param “rmaps_base_oversubscribe=1” in your defa

[OMPI users] Custom datatype with variable length array

Hello, I have a custom datatype MPI_EVENTDATA (created with MPI_Type_create_struct) which is a struct with some fixed size fields and a variable sized array of ints (data). I want to collect a variable number of these types (Events) from all ranks at rank 0. My current version is working for a

[OMPI users] ERR_TRUNCATE with MPI_Pack

Hello, I have this example code: #include #include int main(int argc, char *argv[]) { MPI_Init(&argc, &argv); { MPI_Request req1, req2; std::vector vec = {1, 2, 3}; int packSize = sizeof(int) * vec.size(); int position = 0; std::vector packSendBuf(packSize); int vec

Re: [OMPI users] ERR_TRUNCATE with MPI_Pack

MPI_COMM_WORLD [asaru:30337] *** MPI_ERR_TRUNCATE: message truncated [asaru:30337] *** MPI_ERRORS_ARE_FATAL (processes in this communicator will now abort, [asaru:30337] ***and potentially your MPI job) Best Thanks, Florian > > > Cheers, > > Gilles > > Florian Lindner

[OMPI users] Help debugging invalid read

Hello, I am having problems understanding an error valgrind gives me. I tried to bog down the program as much as possible. The original program as well as the test example both work fine, but when I link the created library to another application I get segfaults. I think that this piece of code

Re: [OMPI users] Help debugging invalid read

< eventsSize; ++i) { MPI_Request req; eventSendBuf.at(i).size = 5; cout << "Isending event " << i << endl; MPI_Isend(&eventSendBuf[i], 1, MPI_EVENTDATA, 0, 0, MPI_COMM_WORLD, &req); requests.push_back(req); } Best, Florian Am 19.0

[OMPI users] Redefining MPI_BOOL depending of sizeof(bool)

Hello, in a code that I am currently reading I have found that code: template struct MPI_Select_unsigned_integer_datatype; template <> struct MPI_Select_unsigned_integer_datatype<1> { static MPI_Datatype datatype; }; MPI_Datatype MPI_Select_unsigned_integer_datatype<1>::datatype = MPI_UNSIG

Re: [OMPI users] Redefining MPI_BOOL depending of sizeof(bool)

Am 29.03.2018 um 09:58 schrieb Florian Lindner: > #define MPI_BOOL MPI_Select_unsigned_integer_datatype::datatype > > > It redefines MPI_BOOL based on the size of bool. I wonder if this is needed > and why? > > I was speculating that the compiler could pack multi

[OMPI users] Invalid rank despite com size large enough

Hello, I have this piece of code PtrRequest MPICommunication::aSend(double *itemsToSend, int size, int rankReceiver) { rankReceiver = rankReceiver - _rankOffset; int comsize = -1; MPI_Comm_size(communicator(rankReceiver), &comsize); TRACE(size, rank(rankReceiver), comsize); MPI_Reque

Re: [OMPI users] Invalid rank despite com size large enough

Hjelm wrote: >> >> Try using MPI_Comm_remotr_size. As this is an intercommunicator that will >> give the number of ranks for send/recv. >> >>> On Apr 13, 2018, at 7:34 AM, Florian Lindner wrote: >>> >>> Hello, >>> >>> I have

[OMPI users] Settings oversubscribe as default?

Hello, I can use --oversubscribe to enable oversubscribing. What is OpenMPI way to set this as a default, e.g. through a config file option or an environment variable? Thanks, Florian ___ users mailing list users@lists.open-mpi.org https://lists.open-m

[OMPI users] Comm_connect: Data unpack would read past end of buffer

Hello, I have this piece of code: MPI_Comm icomm; INFO << "Accepting connection on " << portName; MPI_Comm_accept(portName.c_str(), MPI_INFO_NULL, 0, MPI_COMM_SELF, &icomm); and sometimes (like in 1 of 5 runs), I get: [helium:33883] [[32673,1],0] ORTE_ERROR_LOG: Data unpack would read past end

[OMPI users] Set oversubscribe as default

Hello, I used to have oversubscribe set a default using the environment variable OMPI_MCA_rmaps_base_oversubscribe. However, since recently, probably since 4.0.0, that doesn't seem to work anymore. % echo $OMPI_MCA_rmaps_base_oversubscribe 1 % mpirun --version mpirun (Open MPI) 4.0.0 Report b

[OMPI users] Does Close_port invalidates the communicactor?

Hello, I wasn't able to find anything about that in the standard. Given this situation: MPI_Open_port(MPI_INFO_NULL, portName); MPI_Comm communicator; MPI_Comm_accept(portName, MPI_INFO_NULL, 0, MPI_COMM_WORLD, &communicator); MPI_Close_port(portName); // can I still use communicator