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[mpi] - why this code hangs on gather?
by tomasz jankowski 28 Oct '09

28 Oct '09

hello boost users please look (if you find few minutes) code bellow first i'm declaring molecule class (with needed serialization) in main() first I'm building vector of data (which are molecules) then vector is divided to chunks and send in point to point nonblocking communication model to rest of mpi processes. after that some calculation on molecules are done. at the end I want gather all data but the program hangs on gather in proces with rank 0 does anyone has idea what is wrong in this code? tom #include <vector> #include <algorithm> #include <boost/mpi.hpp> #include <boost/serialization/string.hpp> #include <boost/serialization/vector.hpp> #include <boost/lexical_cast.hpp> #include <iostream> #include <cstdlib> #include <string> #include <boost/random/linear_congruential.hpp> #include <boost/random/uniform_real.hpp> #include <boost/random/variate_generator.hpp> #include <boost/format.hpp> namespace mpi = boost::mpi; class molecule { friend std::ostream & operator<<(std::ostream &os, const molecule &prot); friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int){ ar & x_ & y_ & z_ & number_ & message_; } public: // constructor molecule(){x_=0; y_=0; z_=0; number_= 0; message_ = "";}; molecule(double x, double y, double z, unsigned int n, std::string m) : x_(x), y_(y), z_(z), number_(n), message_(m) {} void print(){ std::cout << (boost::format("%.6f") % x_) << " | "<< (boost::format("%.6f") % y_) << " | " << (boost::format("%.6f") % z_) << " | " << number_ << "\t| " << message_ << std::endl; } double x_; double y_; double z_; unsigned int number_; std::string message_; }; int main(int argc, char* argv[]) { //generator boost::minstd_rand generator_real(42u); //distribution boost::uniform_real<> uni_dist_real(0,1); //functor boost::variate_generator<boost::minstd_rand, boost::uniform_real<> > uni_real(generator_real, uni_dist_real); mpi::environment env(argc, argv); mpi::communicator world; // data construction std::vector<molecule> data; if (world.rank() == 0) { for(unsigned int i=0;i<8020;++i){ std::string txt("see you later aligator"); molecule tmp(1,1,1,i,txt); data.push_back(tmp); } } //broadcast(world,data,0); //we could do it by broadcast (line above) - but lets do it by point to point with only amount of data we need //work vectors std::vector<molecule> res; std::vector<std::vector<molecule> > allRes; // we need to divide our data between processes unsigned int nProcs=world.size(); unsigned int chunkSize=data.size() / nProcs; unsigned int extraBits=data.size() % nProcs; // extra bits we will do in root process if( world.rank() == 0 ){ mpi::request reqs[nProcs-1]; for(unsigned int i=1;i<nProcs;++i){ std::vector<molecule> sendmol; unsigned int pos=extraBits+i*chunkSize; for(unsigned int j=0;j<chunkSize;++j){ sendmol.push_back(data[pos]); pos++; } reqs[i-1] = world.isend(i, 0, sendmol); std::cout<<"msg sended to "<< i <<std::endl;std::cout.flush(); } for(unsigned int i=0;i<chunkSize + extraBits;++i){ molecule tmp = data[i]; tmp.x_ *= uni_real(); tmp.y_ *= uni_real(); tmp.z_ *= uni_real(); tmp.message_ = "from process: " + boost::lexical_cast<std::string>(world.rank()); res.push_back(tmp); } mpi::wait_all(reqs, reqs + nProcs - 1); std::cout<<"calculation finished in 0 "<<std::endl;std::cout.flush(); } std::vector<molecule> recvmol; mpi::request recv; recv = world.irecv(0, 0, recvmol); recv.wait(); std::cout<<"receiving finished "<<world.rank()<<std::endl;std::cout.flush(); for(unsigned int i=0;i<recvmol.size();++i){ molecule tmp = recvmol[i]; tmp.x_ *= uni_real(); tmp.y_ *= uni_real(); tmp.z_ *= uni_real(); tmp.print(); tmp.message_ = "from process: " + boost::lexical_cast<std::string>(world.rank()); res.push_back(tmp); } std::cout<<"calculation finished in "<<world.rank()<<std::endl;std::cout.flush(); //wysylanie wynikow ze wszystkich procesow mpi do procesu 0 if( world.rank() == 0 ){ gather(world,res,allRes,0); std::cout<<"gather finished "<<world.rank()<<std::endl;std::cout.flush(); } else { gather(world,res,0); std::cout<<"gather finished"<<world.rank()<<std::endl;std::cout.flush(); } // output if(world.rank()==0){ for(unsigned int i=0;i<static_cast<unsigned int>(world.size());++i){ std::cout<<"results from process "<<i<<": "<<std::endl; for(int k=0; k<allRes[i].size();k++){ allRes[i][k].print(); } std::cout<<std::endl; } std::cout<<"making output finished "<<world.rank()<<std::endl;std::cout.flush(); } return 0; } ---------------------------------------------------- Kabaret Łowcy.B atakuje! Wygraj płytę DVD. Weź udział w konkursie: http://klik.wp.pl/?adr=http%3A%2F%2Fcorto.www.wp.pl%2Fas%2Fkonkurs_lowcy.ht…

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[spirit][regex] rxstrlit/regex_p with wchar_t strings
by Adam Badura 28 Oct '09

28 Oct '09

Is it possible to use rxstrlit/regex_p with wide character strings (wchar_t based)? Or even better, with arbitrary char type/char traits pair? I tried this with suggested example (http://www.boost.org/doc/libs/1_40_0/libs/spirit/classic/example/fundamenta…) and after converting to wchar_t what was required and compiling it run successfully. But it generated a lot of warnings about converting wchar_t to char in headers that looked like regex headers. So I guess it worked only because the wchar_ts in the example are actually chars. If I changed the example to use wchar_t which have no corresponding char values the example would likely fail. In the end I have a string with templated char type and traits type (just like with string and iostream library). And I want to match it against grammar build from (among others) strings with the same char type and traits type. Can I force regex in Spirit to do that? Adam Badura

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Preprocessor Sum Shift
by Mitch Besser 28 Oct '09

28 Oct '09

I would like to take the following Sequence of Tuples: ((A, 1)) ((B, 1)) ((C, 1)) ((D, 2)) ((E, 4)) and create a summation as follows: ((A, 0)) ((B, 1)) ((C, 2)) ((D, 3)) ((E, 5)) I've been able to produce the following summation: ((A, 1)) ((B, 2)) ((C, 3)) ((D, 5)) ((E, 9)) Which is close to correct but is shifted. No matter what I try, I can't create the desired result. It seems the preprocessor library just doesn't have enough power to do the job, but maybe there's a way to do this I can't see. For those interested, the input represents member variables and their respective sizes. The output is member variables and their respective offsets within the struct (byte aligned in the example case). The ultimate goal is to generate some test case code, so feel free to suggest a non-preprocessor way to do the same thing. As an aside, I get warnings in the case where there is only 1 Tuple in the Sequence ((A, 1)). It would be nice to solve this too. Thanks email: <pdx247(a)yahoo.com>

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Re: [Boost-users] linker error with Boost serialization on 64 bit box. Works fine on 32 bit box.
by Mangal 28 Oct '09

28 Oct '09

I changed the config.jam file to point to the STLPORT installation. My command to build boost libs is : run bjam toolset=msvc stdlib=stlport stage All the libraries are built ( both serialization and wserialization are there) 2 of the linker errors are: BinarySerialization.obj : error LNK2001: unresolved external symbol "protected: __thiscall boost::archive::text_oarchive_impl<class boost::archive::text_oarchive>::text_oarchive_impl<class boost::archive::text_oarchive>(class stlpmtx_std::basic_ostream<char,class stlpmtx_std::char_traits<char> > &,unsigned int)" (??0?$text_oarchive_impl@Vtext_oarchive@archive@boost@@@archive@boost@@IAE@AAV?$basic_ostream@DV?$char_traits@D@stlpmtx_std@@@stlpmtx_std@@I@Z) libboost_serialization-vc90-mt-p-1_40.lib(extended_type_info_typeid.obj) : error LNK2001: unresolved external symbol "__declspec(dllimport) public: static void __cdecl stlp_std::__node_alloc::deallocate(void *,unsigned int)" (__imp_?deallocate@__node_alloc@stlp_std@@SAXPAXI@Z) Thanks Steven Watanabe-4 wrote: > > AMDG > > Mangal wrote: >> I am using STLPort 5.2.1 and Boost1_40_0 with MSVC 9.0. >> I have successfully compiled boost libs with STLPort and am using the >> Graph, >> filesystem and DateTime libraries. >> I use dynamic linking of STLPort libs. All the projects build and run >> fine. >> >> Today I started looking at the serialization library and just compiling >> the >> basic demo threw a 100 linker errors. >> All the paths for boost libs and STLPort binaries are correct. >> >> This is on a 64 bit system. >> >> When i ran the same code for serialization on a 32 bit box it compiled >> and >> ran fine. >> >> Is there some setting I am missing for 64 bit systems? >> > > Can you post > > a) the error messages (at least the first one) > b) the command(s) that you used to build boost. > > In Christ, > Steven Watanabe > > _______________________________________________ > Boost-users mailing list > Boost-users(a)lists.boost.org > http://lists.boost.org/mailman/listinfo.cgi/boost-users > > -- View this message in context: http://www.nabble.com/linker-error-with-Boost-serialization-on-64-bit-box.-… Sent from the Boost - Users mailing list archive at Nabble.com.

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[newbie-unordered_set] string example
by Soumen 28 Oct '09

28 Oct '09

I'm using boost 1.35. I wanted to use boost::intrusive::unordered_set for std::string - couldn't find an example how to do it. Can someone give a small example? As of now I've coded using from tr1 in following way - typedef std::tr1::unordered_set< std::string, boost::hash< std::string > > Hash; Hash tbl; tbl.insert("abcd"); bool found = tbl.find("xyz") == tbl.end() ? true : false; Regards, - Soumen -- View this message in context: http://www.nabble.com/-newbie-unordered_set--string-example-tp26009431p2600… Sent from the Boost - Users mailing list archive at Nabble.com.

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Re: [Boost-users] thread_specific_ptr problem
by Vertleyb, Arkadiy 28 Oct '09

28 Oct '09

Hi all, The following code demonstrates thread_specific_ptr problem while loading/unloading a shared library. Apparently some resource is not cleanned up. Can somebody comment on this? Thanks, Arkadiy lib.cpp: ------- #include <string> #include <boost/thread.hpp> boost::thread_specific_ptr < std::string > tls_with_mmap; main.cpp: ---------- #include <stdint.h> #include <stdlib.h> #include <dlfcn.h> #include <stdio.h> int main( int argc, const char* argv[]) { if( argc < 3 ) { printf("usage %s <dlname> <repeat count>\n", argv[0]); return 1; } const char* dlname = argv[1]; uint16_t iters = atoi(argv[2]); for( uint16_t i = 0; i < iters; ++i ) { printf("attempt %02d\n", i); void* handle = ::dlopen(dlname, RTLD_NOW ); if( handle ) ::dlclose(handle); else { printf("dlopen failed\n"); break; } } return 0; } build.sh: -------- BOOST_VER=38 CCFLAGS="-Wcomment -Wformat -Wmissing-braces -Wparentheses -Wreturn-type -Wsign-compare -Wstrict-aliasing -Wswitch -Wtrigraphs -Wunknown-pragmas -Wunused-function -Wunused-label -Wunused-value -Wunused-variable -Wextra -g -O0 -fno-inline -fexceptions -ftemplate-depth-128 -Wnon-virtual-dtor -I/usr/include/nptl -I/builder/3rdParty/boost/v${BOOST_VER}.0/include -D__NO_INLINE__=1 -D_DEBUG -DDEBUG" g++ -x c++ -m32 ${CCFLAGS} -fPIC -pipe -o "lib.o" -c "lib.cpp" g++ -m32 -o boost_thread_test.so -shared -Wl,-Bsymbolic -Wl,-h -Wl,boost_thread_test.so -Wl,--no-undefined -Wl,--start-group lib.o /builder/3rdParty/boost/v${BOOST_VER}.0/lib32/gcc-3.4.6/libboost_thread-mt-d.a /usr/lib/libpthread.so -lstdc++ -lc -lm -Wl,--end-group g++ -x c++ -m32 ${CCFLAGS} -fPIC -pipe -o "main.o" -c "main.cpp" g++ -m32 -o boost_thread_test.exe -Wl,--start-group main.o /usr/lib/libpthread.so /usr/lib/libdl.so -lstdc++ -lc -lm -Wl,--end-group Linux version: -------------- Red Hat Enterprise Linux ES release 4 (Nahant Update 4) Invocation: ----------- > ./boost_thread_test.exe ./boost_thread_test.so 600 ... attempt 509 attempt 510 attempt 511 boost_thread_test.exe: libs/thread/src/pthread/thread.cpp:102: void boost::detail::<unnamed>::create_current_thread_tls_key(): Assertion `!pthread_key_create(&current_thread_tls_key,&tls_destructor)' failed. Aborted

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linker error with Boost serialization on 64 bit box. Works fine on 32 bit box.
by Mangal 28 Oct '09

28 Oct '09

Hi I am using STLPort 5.2.1 and Boost1_40_0 with MSVC 9.0. I have successfully compiled boost libs with STLPort and am using the Graph, filesystem and DateTime libraries. I use dynamic linking of STLPort libs. All the projects build and run fine. Today I started looking at the serialization library and just compiling the basic demo threw a 100 linker errors. All the paths for boost libs and STLPort binaries are correct. This is on a 64 bit system. When i ran the same code for serialization on a 32 bit box it compiled and ran fine. Is there some setting I am missing for 64 bit systems? Thanks -- View this message in context: http://www.nabble.com/linker-error-with-Boost-serialization-on-64-bit-box.-… Sent from the Boost - Users mailing list archive at Nabble.com.

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[Interprocess] interprocess_upgradable_mutex and recursivity
by Gaetan Gaumer 27 Oct '09

27 Oct '09

Hello, is there a specific raison why the interprocess_upgradable_mutex is non-recursive ? I need the "Sharable lock" functionality of these mutexes but non-recursivity is a big problem for my usage. Is there a solution to have both "sharability" and "recursivity" in an shared memory storable mutex ? Thanks for your help, Gaëtan

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boost & eclipse IDE
by pedro chaparro 27 Oct '09

27 Oct '09

hi, i'd like to know if there is some tutorial or manual about how to use boost libraries with eclipse IDE. thanks -- Ing Pedro Alonso Chaparro Valero Ciudad Politecnica de la Innovación iTEAM - Mobile Communications Group Polytechnic University of Valencia C\ Camino de Vera S/N, Edificio 8G 46022 Valencia, Spain

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[conversion] Release v0.4: Replace function template specialization by ADL
by vicente.botet 27 Oct '09

27 Oct '09

Hi, I have just released the version 0.4 of Boost.Conversion , which includes since my last publicly announced version 0.3: Replace function template specialization by ADL A Source class is convertible to a Target class if: * Either: A function with the signature convert_to<Target>(Source const&, boost::dummy::type_tag<To> const&) is available via argument dependent lookup * Or: A template specialization of boost::conversion::convert_to<Target, Source> exists for Target and Source * Or: Target is copy constructible from Source (default implementation) The template function convert_to allows to convert a source type to a target type, using argument dependent lookup to select a specialized convert_to function if available. If no specialized convert_to function is available, boost::conversion::convert_to is used. The generic convert_to function requires that the elements to be converted are assignable and copy constructible. It is implemented using the Target copy construction from a Source or the Source conversion operator Target - this is sometimes unavailable. For standard types, we can not add a specialized convert_to function on the namespace std. The alternative to using argument dependent lookup in this situation is to provide a template specialization of boost::conversion::convert_to for every pair of standard types that requires a specialized convert_to. You can found all the detail for dowloading, documentation, ... in http://svn.boost.org/trac/boost/wiki/LibrariesUnderConstruction#Boost.Conve… I'd appreciate it if people could take a look, test it on their compiler and give me some feedback. Thanks to Edward Diener for showing me that multiple assignments should be taken in account. Thanks also to Jeffrey Hellrung and Robert Stewart for showing me that Boost.Conversion should use also ADL. BTW, I'm looking for a review manager. Anyone around here who would like to volunteer? Best regards, _____________________ Vicente Juan Botet Escribá

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