diff --git a/scripts/run_nccl-tests.sh b/scripts/run_nccl-tests.sh
index b929cfcbf62599d57144f52d0e526e34321b72f4..13f7e48ac0fa4d4f3e5fca0033a3413362b2c7f4 100755
--- a/scripts/run_nccl-tests.sh
+++ b/scripts/run_nccl-tests.sh
@@ -28,5 +28,5 @@ fi
 #all_gather_perf
 mpirun --bind-to core --map-by socket ./build/all_gather_perf -b 32M -e 8192M -f 2 -g 1
 #sendrecv_perf
-mpirun --bind-to core --map-by socket ./build/sendrecv_perf -b 32M -e 8192M -f 2 -g 1
+mpirun --bind-to core --map-by socket ./build/sendrecv_perf -b 1 -e 8192M -f 2 -g 1