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add broadcast

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tqchen 2015-01-01 05:42:38 -08:00
parent 90a8505208
commit 31a3d22af4
1 changed files with 16 additions and 0 deletions
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guide/broadcast.cc Normal file
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#include <rabit.h>
using namespace rabit;
const int N = 3;
int main(int argc, char *argv[]) {
rabit::Init(argc, argv);
std::string s;
if (rabit::GetRank() == 0) s = "hello world";
printf("@node[%d] before-broadcast: s=\"%s\"\n",
rabit::GetRank(), s.c_str());
// broadcast s from node 0 to all other nodes
rabit::Broadcast(&s, 0);
printf("@node[%d] after-broadcast: s=\"%s\"\n",
rabit::GetRank(), s.c_str());
rabit::Finalize();
return 0;
}