diff --git a/iotelic/kunlun/Mainline/build/env_kunlun2.sh b/iotelic/kunlun/Mainline/build/env_kunlun2.sh
index 8e9ceb3..7447302 100644
--- a/iotelic/kunlun/Mainline/build/env_kunlun2.sh
+++ b/iotelic/kunlun/Mainline/build/env_kunlun2.sh
@@ -6,6 +6,6 @@ export ftm_build=0
 export opt_build=1
 export flash_build=0
 export cpu1_build=1
-export cco=1
+export cco=0
 export psram_enable=1
 export PLATFORM=FPGA
diff --git a/iotelic/kunlun/Mainline/inc/dbglog/iot_dbglog.h b/iotelic/kunlun/Mainline/inc/dbglog/iot_dbglog.h
index 9842d88..a28e8a1 100644
--- a/iotelic/kunlun/Mainline/inc/dbglog/iot_dbglog.h
+++ b/iotelic/kunlun/Mainline/inc/dbglog/iot_dbglog.h
@@ -29,7 +29,7 @@ Information is free from patent or copyright infringement.
 /* internal includes */
 #include "iot_dbglog_parser.h"
 
-#define DBGLOG_MAX_BUFFER_CNT 4
+#define DBGLOG_MAX_BUFFER_CNT 0
 
 #if (HW_PLATFORM == HW_PLATFORM_SIMU)
 #define DBGLOG_MAX_BUFFER_SIZE (PLC_SHORT_BUF_SIZE - sizeof(cli_msg_hdr_t)- \
diff --git a/iotelic/kunlun/Mainline/plc/inc/plc_const.h b/iotelic/kunlun/Mainline/plc/inc/plc_const.h
index b9de0c1..1d48e2b 100755
--- a/iotelic/kunlun/Mainline/plc/inc/plc_const.h
+++ b/iotelic/kunlun/Mainline/plc/inc/plc_const.h
@@ -109,13 +109,13 @@ Information is free from patent or copyright infringement.
 #else
 /* PSRAM build don't have so much RAM */
 #define PCO_PERFORMANCE_MBPS    (1)     // x1 Mbps
-#define PLC_LONG_BUF_MIN_NUM    (5)     /* 2k buffer minimal requirement */
+#define PLC_LONG_BUF_MIN_NUM    (6)     /* 2k buffer minimal requirement */
 #define PLC_LARGE_BUF_MIN_NUM   (5)     /* 1k buffer minimal requirement */
 #endif
 #else
 #define PCO_PERFORMANCE_MBPS    (1)     // x1 Mbps
-#define PLC_LONG_BUF_MIN_NUM    (7)     /* 2k buffer minimal requirement */
-#define PLC_LARGE_BUF_MIN_NUM   (14)    /* 1k buffer minimal requirement */
+#define PLC_LONG_BUF_MIN_NUM    (4)     /* 2k buffer minimal requirement */
+#define PLC_LARGE_BUF_MIN_NUM   (1)    /* 1k buffer minimal requirement */
 #endif
 #endif
 
@@ -132,31 +132,39 @@ Information is free from patent or copyright infringement.
 
 /* 2K : 1/16 at least 2 */
 #define PLC_LONG_BUF_SIZE       (PLC_HW_RX_BUF_SIZE)
+/*
 #define PLC_LONG_BUF_COUNT      ((PCO_RX_DATA_BUF_KB/PLC_LONG_BUF_SIZE / 16) \
                                     < PLC_LONG_BUF_MIN_NUM ? \
                                     PLC_LONG_BUF_MIN_NUM : \
                                     (PCO_RX_DATA_BUF_KB/PLC_LONG_BUF_SIZE / 16))
+*/
+#define PLC_LONG_BUF_COUNT      25
 #define PLC_LONG_RX_BUF_COUNT   (PLC_LONG_BUF_COUNT / 2)
 #define PLC_LONG_TX_BUF_COUNT   (PLC_LONG_BUF_COUNT - PLC_LONG_RX_BUF_COUNT)
 
 /* 1K : 1/16 */
 #define PLC_LARGE_BUF_SIZE      (PLC_HW_RX_BUF_SIZE / 2)
+/*
 #define PLC_LARGE_BUF_COUNT \
     ((PCO_RX_DATA_BUF_KB/PLC_LARGE_BUF_SIZE / 16) < PLC_LARGE_BUF_MIN_NUM ? \
     PLC_LARGE_BUF_MIN_NUM : (PCO_RX_DATA_BUF_KB/PLC_LARGE_BUF_SIZE / 16))
+*/
+#define PLC_LARGE_BUF_COUNT     1
 #define PLC_LARGE_RX_BUF_COUNT  (PLC_LARGE_BUF_COUNT / 2)
 #define PLC_LARGE_TX_BUF_COUNT  (PLC_LARGE_BUF_COUNT - PLC_LARGE_RX_BUF_COUNT)
 
 /* 136 : 3/8, in rx ring */
 #define PLC_SMALL_BUF_SIZE      (PLC_RX_BUF_RESV_SIZE + 136 + MAC_HW_WAR_RESV_BYTES)
-#define PLC_SMALL_BUF_COUNT     (PCO_RX_DATA_BUF_KB/PLC_SMALL_BUF_SIZE / 8 * 3)
+//#define PLC_SMALL_BUF_COUNT     (PCO_RX_DATA_BUF_KB/PLC_SMALL_BUF_SIZE / 8 * 3)
+#define PLC_SMALL_BUF_COUNT     1
 #define PLC_SMALL_RX_BUF_COUNT  (PLC_SMALL_BUF_COUNT / 2)
 #define PLC_SMALL_TX_BUF_COUNT  (PLC_SMALL_BUF_COUNT - PLC_SMALL_RX_BUF_COUNT)
 
 /* 520 : 4/8, in rx ring */
 /* the rest alloc to 520's buffer size */
 #define PLC_SHORT_BUF_SIZE      (PLC_RX_BUF_RESV_SIZE + 520 + MAC_HW_WAR_RESV_BYTES)
-#define PLC_SHORT_BUF_COUNT     (PCO_RX_DATA_BUF_KB/PLC_SHORT_BUF_SIZE / 8 * 4)
+//#define PLC_SHORT_BUF_COUNT     (PCO_RX_DATA_BUF_KB/PLC_SHORT_BUF_SIZE / 8 * 4)
+#define PLC_SHORT_BUF_COUNT     1
 #define PLC_SHORT_RX_BUF_COUNT  (PLC_SHORT_BUF_COUNT / 2)
 #define PLC_SHORT_TX_BUF_COUNT  (PLC_SHORT_BUF_COUNT - PLC_SHORT_RX_BUF_COUNT)