diff --git a/trunk/conf/full.conf b/trunk/conf/full.conf
index 66a8a27ab..6dfb8eca5 100644
--- a/trunk/conf/full.conf
+++ b/trunk/conf/full.conf
@@ -445,6 +445,7 @@ rtc_server {
     gso             on;
     # Whether pad first packet for GSO for padding bytes.
     # If 0, disable padding for GSO.
+    # @remark The max padding size is 0x7f(127).
     # default: 0
     padding         0;
 }
diff --git a/trunk/scripts/perf_gso.py b/trunk/scripts/perf_gso.py
index 2158659e0..f09014143 100755
--- a/trunk/scripts/perf_gso.py
+++ b/trunk/scripts/perf_gso.py
@@ -43,7 +43,7 @@ obj = json.loads(s)
 
 # 2, 3, 5, 9, 16, 32, 64, 128, 256
 keys = ['lt_2', 'lt_3', 'lt_5', 'lt_9', 'lt_16', 'lt_32', 'lt_64', 'lt_128', 'lt_256', 'gt_256']
-print("\n----------- 1 2 [3,4] [5,8] [9,15] [16,31] [32,63] [64,127] [128,255] [256,+)"),
+print("\n----------- 1 2 [3,4] [5,8] [9,15] [16,31] [32,63] [64,127] [128,255] [256,+) Packets"),
 
 print ""
 print("AV---Frames"),
diff --git a/trunk/src/app/srs_app_config.cpp b/trunk/src/app/srs_app_config.cpp
index 85c70f87b..8df22fea4 100644
--- a/trunk/src/app/srs_app_config.cpp
+++ b/trunk/src/app/srs_app_config.cpp
@@ -4855,7 +4855,7 @@ int SrsConfig::get_rtc_server_padding()
         return DEFAULT;
     }
 
-    return srs_min(16, ::atoi(conf->arg0().c_str()));
+    return srs_min(127, ::atoi(conf->arg0().c_str()));
 }
 
 SrsConfDirective* SrsConfig::get_rtc(string vhost)
diff --git a/trunk/src/app/srs_app_rtc_conn.cpp b/trunk/src/app/srs_app_rtc_conn.cpp
index 03497c08f..f17cd6ea6 100644
--- a/trunk/src/app/srs_app_rtc_conn.cpp
+++ b/trunk/src/app/srs_app_rtc_conn.cpp
@@ -489,7 +489,7 @@ void SrsRtcPackets::reset(bool gso, bool merge_nalus)
         SrsRtpPacket2* packet = packets[i];
         packet->reset();
     }
-    
+
     use_gso = gso;
     should_merge_nalus = merge_nalus;