diff --git a/LVGL.Simulator/lvgl_mydemo/lib/data_struct/queue_malloc.c b/LVGL.Simulator/lvgl_mydemo/lib/data_struct/queue_malloc.c
index b52eb34..d425ab2 100644
--- a/LVGL.Simulator/lvgl_mydemo/lib/data_struct/queue_malloc.c
+++ b/LVGL.Simulator/lvgl_mydemo/lib/data_struct/queue_malloc.c
@@ -34,18 +34,13 @@ void *QueueMallocInput(queue_t *q, void *val, val_size valSize)
         return NULL;
     }
 
-    if (DEF_QUEUE_RESERVE_SIZE(q) < valSize) {          // 没有足够的空间保存这个数据
-        return NULL;
-    }
-
     if (q->elemCnt > 0) {
         bufPos = q->tail + DEF_QUEUE_GET_VAL_SIZE(q, q->tail);
         if (q->tail >= q->front) {          // tail 在 front 后面，队列还没有循环
-            if (((q->bufSize - bufPos) < needSize) && (q->front < needSize)) {
-                return NULL;          // 空间虽然足够，但是一部分在头，一部分在末尾，不连续
-            }
             if (q->bufSize - bufPos < needSize) {
-                DEF_QUEUE_SET_VAL_SIZE(q, bufPos, DEF_QUEUE_VAL_LEN_INVAILD);
+                if (bufPos + sizeof(val_size) <= q->bufSize) {
+                    DEF_QUEUE_SET_VAL_SIZE(q, bufPos, DEF_QUEUE_VAL_LEN_INVAILD);
+                }
                 bufPos = 0;
             }
         } else {          // front 在 tail 后面，队列已经循环
@@ -78,18 +73,20 @@ void *QueueMallocOutput(queue_t *q, val_size *size)
     if (size) {
         *size = DEF_QUEUE_GET_VAL_SIZE(q, q->front);
     }
-    dataSize = DEF_QUEUE_GET_VAL_SIZE(q, q->front) + sizeof(val_size);
+    dataSize = DEF_QUEUE_GET_VAL_SIZE(q, q->front);
     value    = &q->buf[q->front + sizeof(val_size)];
 
     q->front += dataSize;
 
-    if (DEF_QUEUE_GET_VAL_SIZE(q, q->front) == DEF_QUEUE_VAL_LEN_INVAILD) {
-        q->front = 0;
-    }
-
     q->usedSize -= dataSize;
     q->elemCnt--;
 
+    if ((q->elemCnt == 0)
+        || (q->front + sizeof(val_size) >= q->bufSize)
+        || (DEF_QUEUE_GET_VAL_SIZE(q, q->front) == DEF_QUEUE_VAL_LEN_INVAILD)) {
+        q->front = 0;
+    }
+
     return value;
 }
 
@@ -103,8 +100,8 @@ bool QueueMallocSpaceChk(queue_t *q, val_size size)
     }
 
     if (q->elemCnt > 0) {
+        bufPos = q->tail + DEF_QUEUE_GET_VAL_SIZE(q, q->tail);
         if (q->tail >= q->front) {
-            bufPos = q->tail + DEF_QUEUE_GET_VAL_SIZE(q, q->tail);
             if ((q->bufSize - bufPos < needSize) && (q->front < needSize)) {
                 return false;
             }
@@ -138,6 +135,10 @@ void *QueueMallocPeekAfter(queue_t *q, void *cur_item, val_size *size)
         return NULL;
     }
 
+    if (bufPos + sizeof(val_size) >= q->bufSize) {
+        bufPos = 0;
+    }
+
     bufPos   = bufPos + DEF_QUEUE_GET_VAL_SIZE(q, bufPos);
     itemSize = DEF_QUEUE_GET_VAL_SIZE(q, bufPos);
     if (itemSize == DEF_QUEUE_VAL_LEN_INVAILD) {
diff --git a/LVGL.Simulator/lvgl_mydemo/lib/lib_sys_log.c b/LVGL.Simulator/lvgl_mydemo/lib/lib_sys_log.c
index 0af80ca..a8327a0 100644
--- a/LVGL.Simulator/lvgl_mydemo/lib/lib_sys_log.c
+++ b/LVGL.Simulator/lvgl_mydemo/lib/lib_sys_log.c
@@ -101,6 +101,13 @@ void Lib_LogPrintf(uint8_t level, const char *fmt, ...)
     Lib_LogUnlock();
 
 #if DEF_LIB_LOG_PRINTF
+    // static uint32_t t   = 0;
+    // static uint32_t err = 0;
+    // uint32_t        len = strlen(log_item->Buf);
+    // if (len == 0) {
+    //     err++;
+    // }
+    // printf("File[%d] e=%d %s\n", t++, err, log_item->Buf);
     printf("%s\n", log_item->Buf);
 #endif
 }
diff --git a/LVGL.Simulator/lvgl_mydemo/lvgl_app.c b/LVGL.Simulator/lvgl_mydemo/lvgl_app.c
index d2ba906..129b4ac 100644
--- a/LVGL.Simulator/lvgl_mydemo/lvgl_app.c
+++ b/LVGL.Simulator/lvgl_mydemo/lvgl_app.c
@@ -36,21 +36,36 @@ static void log_write_timer_cb(lv_timer_t *t)
     Lib_LogLoop();
 }
 
-static bool log_write_to_file(LIB_LOG_ITEM_T *item)
+void log_create_event_cb(lv_timer_t *t)
 {
-    printf("File %s\n", item->Buf);
-    return true;
+    LV_UNUSED(t);
+    uint32_t i;
+    uint32_t rand     = lv_rand(3, 100);
+    uint8_t  buf[102] = {0};
+
+    for (i = 0; i < rand; i++) {
+        buf[i] = '*';
+    }
+    buf[i + 1] = '\0';
+
+    TRACE_I("%s\n", buf);          // 随机添加长度为(3-100)的日志
 }
 
-static bool log_write_to_flash(LIB_LOG_ITEM_T *item)
+static bool log_write_to_file(LIB_LOG_ITEM_T *item)          // 日志写回调函数
 {
-    printf("Flash %s\n", item->Buf);
-    return true;
-}
-
-static bool log_write_to_sd(LIB_LOG_ITEM_T *item)
-{
-    printf("Sd %s\n", item->Buf);
+    // erroe rate = 134 / 80244 : 0.0016699067843079
+    /**
+     * 测试结果，向日志系统中写入了80244条日志，
+     * 无效的日志为134条，日志无效概率为：
+     *              0.167%
+     */
+    static uint32_t t   = 0;
+    static uint32_t err = 0;          //记录日志写回调函数中无效日志的个数
+    uint32_t        len = strlen(item->Buf);
+    if (len == 0) {
+        err++;
+    }
+    printf("File[%d] e=%d %s\n", t++, err, item->Buf);
     return true;
 }
 
@@ -62,11 +77,7 @@ void lvgl_app_init(void)
 {
     Lib_LogInit();
 
-    Lib_LogRegistWriter(log_write_to_file);           // 模拟写日志到文件
-    Lib_LogRegistWriter(log_write_to_flash);          // 模拟写日志到Flash
-    Lib_LogRegistWriter(log_write_to_sd);             // 模拟写日志到SD卡
-
-    Lib_LogUnregistWriter(log_write_to_sd);
+    Lib_LogRegistWriter(log_write_to_file);          // 模拟写日志到文件
 
     DataModelInit();
 
@@ -76,4 +87,5 @@ void lvgl_app_init(void)
     TRACE_W("Hello wrold!");
 
     lv_timer_create(log_write_timer_cb, 50, NULL);
+    lv_timer_create(log_create_event_cb, 100, NULL);
 }