From 5ba670d55150f7c9dcf590e5139dcc9945f65c53 Mon Sep 17 00:00:00 2001
From: Jithin Jose <jijos@microsoft.com>
Date: Fri, 18 Dec 2020 10:12:54 -0800
Subject: [PATCH] Use DJB2a hash algorithm in getHostHash()

[ROCm/rccl-tests commit: 0aeba157db77cc9e99186639bf71368b74fb90e2]
---
 projects/rccl-tests/src/common.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/projects/rccl-tests/src/common.h b/projects/rccl-tests/src/common.h
index b69d071606..6fc6bfdd69 100644
--- a/projects/rccl-tests/src/common.h
+++ b/projects/rccl-tests/src/common.h
@@ -174,10 +174,10 @@ static void getHostName(char* hostname, int maxlen) {
 #include <stdint.h>
 
 static uint64_t getHostHash(const char* string) {
-  // Based on DJB2, result = result * 33 + char
+  // Based on DJB2a, result = result * 33 ^ char
   uint64_t result = 5381;
   for (int c = 0; string[c] != '\0'; c++){
-    result = ((result << 5) + result) + string[c];
+    result = ((result << 5) + result) ^ string[c];
   }
   return result;
 }