From 13d0ddd12e93d72ce69a083e5811439a3b658f73 Mon Sep 17 00:00:00 2001
From: Wenkai Du <wenkai.du@amd.com>
Date: Wed, 25 Sep 2019 14:07:04 -0700
Subject: [PATCH] Init data for throughput iterations to avoid all zero data

---
 src/common.cu | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/common.cu b/src/common.cu
index 36f2aa0941..e13aa3521b 100644
--- a/src/common.cu
+++ b/src/common.cu
@@ -851,6 +851,9 @@ testResult_t run() {
     HIPCHECK(hipSetDevice(localRank*nThreads*nGpus+i));
     AllocateBuffs(sendbuffs+i, sendBytes, recvbuffs+i, recvBytes, expected+i, (size_t)maxBytes, nProcs*nThreads*nGpus);
     HIPCHECK(hipStreamCreateWithFlags(streams+i, hipStreamNonBlocking));
+    // initialize data buffer to avoid all zero data
+    TESTCHECK(InitData(sendbuffs[i], maxBytes, ncclUint8, 0, i));
+    HIPCHECK(hipDeviceSynchronize());
   }
 
   //if parallel init is not selected, use main thread to initialize NCCL