diff --git a/osal/mpp_time.cpp b/osal/mpp_time.cpp
index 8a2fc569..36cb184d 100644
--- a/osal/mpp_time.cpp
+++ b/osal/mpp_time.cpp
@@ -29,13 +29,13 @@ RK_S64 mpp_time()
 }
 
 #else
-#include <sys/time.h>
+#include <time.h>
 
 RK_S64 mpp_time()
 {
-    struct timeval tv_date;
-    gettimeofday(&tv_date, NULL);
-    return (RK_S64)tv_date.tv_sec * 1000000 + (RK_S64)tv_date.tv_usec;
+    struct timespec time = {0, 0};
+    clock_gettime(CLOCK_MONOTONIC, &time);
+    return (RK_S64)time.tv_sec * 1000000 + (RK_S64)time.tv_nsec / 1000;
 }
 
 #endif
diff --git a/osal/test/CMakeLists.txt b/osal/test/CMakeLists.txt
index c2150a97..e263ff45 100644
--- a/osal/test/CMakeLists.txt
+++ b/osal/test/CMakeLists.txt
@@ -28,6 +28,9 @@ add_mpp_osal_test(mpp_env)
 # malloc system unit test
 add_mpp_osal_test(mpp_mem)
 
+# time system unit test
+add_mpp_osal_test(mpp_time)
+
 # hardware platform feature detection unit test
 add_mpp_osal_test(mpp_platform)
 
diff --git a/osal/test/mpp_time_test.c b/osal/test/mpp_time_test.c
new file mode 100644
index 00000000..59a941ad
--- /dev/null
+++ b/osal/test/mpp_time_test.c
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2015 Rockchip Electronics Co. LTD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define MODULE_TAG "mpp_time_test"
+
+#include "mpp_log.h"
+#include "mpp_time.h"
+
+int main()
+{
+    RK_S64 time_0;
+    RK_S64 time_1;
+
+    mpp_err("mpp time test start\n");
+
+    time_0 = mpp_time();
+
+    msleep(10);
+
+    time_1 = mpp_time();
+
+    mpp_log("time 0 %lld us\n", time_0);
+    mpp_log("time 1 %lld us\n", time_1);
+    mpp_log("diff expected 10 ms real %.2f ms\n", (float)(time_1 - time_0) / 1000);
+
+    mpp_err("mpp time test done\n");
+
+    return 0;
+}