From abff264000a9926bb7b96172fd49dae3b804c4e0 Mon Sep 17 00:00:00 2001
From: ShooterIT <wangyuancode@163.com>
Date: Mon, 18 May 2020 18:18:20 +0800
Subject: [PATCH] Redis Benchmark: generate random test data

The function of generating random data is designed by antirez. See #7196.
---
 src/redis-benchmark.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/redis-benchmark.c b/src/redis-benchmark.c
index 2df41580b..19c72551c 100644
--- a/src/redis-benchmark.c
+++ b/src/redis-benchmark.c
@@ -1269,6 +1269,17 @@ static void updateClusterSlotsConfiguration() {
     pthread_mutex_unlock(&config.is_updating_slots_mutex);
 }
 
+/* Generate random data for redis benchmark. See #7196. */
+static void genBenchmarkRandomData(char *data, int count) {
+    static uint32_t state = 1234;
+    int i = 0;
+
+    while (count--) {
+        state = (state*1103515245+12345);
+        data[i++] = '0'+((state>>16)&63);
+    }
+}
+
 /* Returns number of consumed options. */
 int parseOptions(int argc, const char **argv) {
     int i;
@@ -1619,7 +1630,7 @@ int main(int argc, const char **argv) {
     /* Run default benchmark suite. */
     data = zmalloc(config.datasize+1);
     do {
-        memset(data,'x',config.datasize);
+        genBenchmarkRandomData(data, config.datasize);
         data[config.datasize] = '\0';
 
         if (test_is_selected("ping_inline") || test_is_selected("ping"))