Updating to use hipDeviceMallocUncached (#95)

Use hipDeviceMallocUncached instead of hipDeviceMallocFinegrained on newer ROCm versions.

src/common.cu

@@ -880,9 +880,16 @@ testResult_t AllocateBuffs(void **sendbuff, size_t sendBytes, void **recvbuff, s
     nbytes = nbytes + cache_bytes;
   }
   if (memorytype == ncclFine) {
-    CUDACHECK(hipExtMallocWithFlags(sendbuff, nbytes, hipDeviceMallocFinegrained));
-    CUDACHECK(hipExtMallocWithFlags(recvbuff, nbytes, hipDeviceMallocFinegrained));
-    if (datacheck) CUDACHECK(hipExtMallocWithFlags(expected, recvBytes, hipDeviceMallocFinegrained));
+    if(HIP_VERSION >= 50700000) {
+      CUDACHECK(hipExtMallocWithFlags(sendbuff, nbytes, hipDeviceMallocUncached));
+      CUDACHECK(hipExtMallocWithFlags(recvbuff, nbytes, hipDeviceMallocUncached));
+      if (datacheck) CUDACHECK(hipExtMallocWithFlags(expected, recvBytes, hipDeviceMallocUncached));
+    }
+    else {
+      CUDACHECK(hipExtMallocWithFlags(sendbuff, nbytes, hipDeviceMallocFinegrained));
+      CUDACHECK(hipExtMallocWithFlags(recvbuff, nbytes, hipDeviceMallocFinegrained));
+      if (datacheck) CUDACHECK(hipExtMallocWithFlags(expected, recvBytes, hipDeviceMallocFinegrained));
+    }
   }
   else if (memorytype == ncclHost) {
     CUDACHECK(hipHostMalloc(sendbuff, nbytes));