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lgorithmique
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umérique
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istribuée
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protect (hopefully) collective communication algorithms from abuse.
[simgrid.git]
/
src
/
smpi
/
colls
/
allgather-rhv.c
diff --git
a/src/smpi/colls/allgather-rhv.c
b/src/smpi/colls/allgather-rhv.c
index
aceb283
..
8179aff
100644
(file)
--- a/
src/smpi/colls/allgather-rhv.c
+++ b/
src/smpi/colls/allgather-rhv.c
@@
-21,6
+21,10
@@
smpi_coll_tuned_allgather_rhv(void *sbuf, int send_count,
// get size of the communicator, followed by rank
num_procs = smpi_comm_size(comm);
// get size of the communicator, followed by rank
num_procs = smpi_comm_size(comm);
+
+ if((num_procs&(num_procs-1)))
+ THROWF(arg_error,0, "allgather rhv algorithm can't be used with non power of two number of processes ! ");
+
rank = smpi_comm_rank(comm);
// get size of single element's type for send buffer and recv buffer
rank = smpi_comm_rank(comm);
// get size of single element's type for send buffer and recv buffer