diff --git a/README.md b/README.md
index 4024d0593..4ad9691c4 100755
--- a/README.md
+++ b/README.md
@@ -240,6 +240,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 
 ## History
+* v1.0, 2014-06-19, add srs bytes and kbps to api summaries. 0.9.126
 * v1.0, 2014-06-18, add network bytes to api summaries. 0.9.125
 * v1.0, 2014-06-14, fix [#98](https://github.com/winlinvip/simple-rtmp-server/issues/98), workaround for librtmp ping(fmt=1,cid=2 fresh stream). 0.9.124
 * v1.0, 2014-05-29, support flv inject and flv http streaming with start=bytes. 0.9.122
diff --git a/trunk/src/app/srs_app_conn.hpp b/trunk/src/app/srs_app_conn.hpp
index 96ac6c98a..c0eeaf2e4 100644
--- a/trunk/src/app/srs_app_conn.hpp
+++ b/trunk/src/app/srs_app_conn.hpp
@@ -34,9 +34,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_app_st.hpp>
 #include <srs_app_thread.hpp>
+#include <srs_app_kbps.hpp>
 
 class SrsServer;
-class SrsConnection : public ISrsThreadHandler
+class SrsConnection : public virtual ISrsThreadHandler, public virtual IKbpsDelta
 {
 private:
     SrsThread* pthread;
@@ -52,6 +53,8 @@ public:
     virtual int start();
     virtual int cycle();
     virtual void on_thread_stop();
+public:
+    virtual void kbps_resample() = 0;
 protected:
     virtual int do_cycle() = 0;
     virtual void stop();
diff --git a/trunk/src/app/srs_app_edge.cpp b/trunk/src/app/srs_app_edge.cpp
index edf52eb49..c50a7cea8 100644
--- a/trunk/src/app/srs_app_edge.cpp
+++ b/trunk/src/app/srs_app_edge.cpp
@@ -182,8 +182,8 @@ int SrsEdgeIngester::ingest()
             srs_trace("<- "SRS_LOG_ID_EDGE_PLAY
                 " time=%"PRId64", okbps=%d,%d,%d, ikbps=%d,%d,%d", 
                 pithy_print.age(),
-                kbps->get_send_kbps(), kbps->get_send_kbps_sample_high(), kbps->get_send_kbps_sample_medium(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_sample_high(), kbps->get_recv_kbps_sample_medium());
+                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
         }
 
         // read from client.
@@ -479,8 +479,8 @@ int SrsEdgeForwarder::cycle()
             srs_trace("-> "SRS_LOG_ID_EDGE_PUBLISH
                 " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d", 
                 pithy_print.age(), count,
-                kbps->get_send_kbps(), kbps->get_send_kbps_sample_high(), kbps->get_send_kbps_sample_medium(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_sample_high(), kbps->get_recv_kbps_sample_medium());
+                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
         }
         
         // ignore when no messages.
diff --git a/trunk/src/app/srs_app_forward.cpp b/trunk/src/app/srs_app_forward.cpp
index df6d4499f..a9f71dea5 100644
--- a/trunk/src/app/srs_app_forward.cpp
+++ b/trunk/src/app/srs_app_forward.cpp
@@ -351,8 +351,8 @@ int SrsForwarder::forward()
             srs_trace("-> "SRS_LOG_ID_FOWARDER
                 " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d", 
                 pithy_print.age(), count,
-                kbps->get_send_kbps(), kbps->get_send_kbps_sample_high(), kbps->get_send_kbps_sample_medium(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_sample_high(), kbps->get_recv_kbps_sample_medium());
+                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
         }
         
         // ignore when no messages.
diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index f38be42ac..0140dc983 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -390,6 +390,7 @@ int SrsApiSummaries::do_process_request(SrsSocket* skt, SrsHttpMessage* req)
     SrsMemInfo* m = srs_get_meminfo();
     SrsPlatformInfo* p = srs_get_platform_info();
     SrsNetworkDevices* n = srs_get_network_devices();
+    SrsNetworkRtmpServer* nrs = srs_get_network_rtmp_server();
     
     float self_mem_percent = 0;
     if (m->MemTotal > 0) {
@@ -429,6 +430,7 @@ int SrsApiSummaries::do_process_request(SrsSocket* skt, SrsHttpMessage* req)
             << JFIELD_ORG("meminfo_ok", (m->ok? "true":"false")) << JFIELD_CONT
             << JFIELD_ORG("platform_ok", (p->ok? "true":"false")) << JFIELD_CONT
             << JFIELD_ORG("network_ok", (n_ok? "true":"false")) << JFIELD_CONT
+            << JFIELD_ORG("network_srs_ok", (nrs->ok? "true":"false")) << JFIELD_CONT
             << JFIELD_ORG("now_ms", now) << JFIELD_CONT
             << JFIELD_ORG("self", JOBJECT_START)
                 << JFIELD_ORG("pid", getpid()) << JFIELD_CONT
@@ -455,7 +457,12 @@ int SrsApiSummaries::do_process_request(SrsSocket* skt, SrsHttpMessage* req)
                 << JFIELD_ORG("load_15m", p->load_fifteen_minutes) << JFIELD_CONT
                 << JFIELD_ORG("net_sample_time", n_sample_time) << JFIELD_CONT
                 << JFIELD_ORG("net_recv_bytes", nr_bytes) << JFIELD_CONT
-                << JFIELD_ORG("net_send_bytes", ns_bytes)
+                << JFIELD_ORG("net_send_bytes", ns_bytes) << JFIELD_CONT
+                << JFIELD_ORG("srs_sample_time", nrs->sample_time) << JFIELD_CONT
+                << JFIELD_ORG("srs_recv_bytes", nrs->rbytes) << JFIELD_CONT
+                << JFIELD_ORG("srs_recv_kbps", nrs->rkbps) << JFIELD_CONT
+                << JFIELD_ORG("srs_send_bytes", nrs->sbytes) << JFIELD_CONT
+                << JFIELD_ORG("srs_send_kbps", nrs->skbps)
             << JOBJECT_END
         << JOBJECT_END
         << JOBJECT_END;
@@ -707,6 +714,23 @@ SrsHttpApi::~SrsHttpApi()
     srs_freep(parser);
 }
 
+void SrsHttpApi::kbps_resample()
+{
+    // TODO: FIXME: implements it
+}
+
+int64_t SrsHttpApi::get_send_bytes_delta()
+{
+    // TODO: FIXME: implements it
+    return 0;
+}
+
+int64_t SrsHttpApi::get_recv_bytes_delta()
+{
+    // TODO: FIXME: implements it
+    return 0;
+}
+
 int SrsHttpApi::do_cycle()
 {
     int ret = ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_http_api.hpp b/trunk/src/app/srs_app_http_api.hpp
index b94938b23..7bc6e26d2 100644
--- a/trunk/src/app/srs_app_http_api.hpp
+++ b/trunk/src/app/srs_app_http_api.hpp
@@ -196,6 +196,12 @@ private:
 public:
     SrsHttpApi(SrsServer* srs_server, st_netfd_t client_stfd, SrsHttpHandler* _handler);
     virtual ~SrsHttpApi();
+public:
+    virtual void kbps_resample();
+// interface IKbpsDelta
+public:
+    virtual int64_t get_send_bytes_delta();
+    virtual int64_t get_recv_bytes_delta();
 protected:
     virtual int do_cycle();
 private:
diff --git a/trunk/src/app/srs_app_http_conn.cpp b/trunk/src/app/srs_app_http_conn.cpp
index 5ff436f4c..d96138685 100644
--- a/trunk/src/app/srs_app_http_conn.cpp
+++ b/trunk/src/app/srs_app_http_conn.cpp
@@ -511,6 +511,23 @@ SrsHttpConn::~SrsHttpConn()
     srs_freep(parser);
 }
 
+void SrsHttpConn::kbps_resample()
+{
+    // TODO: FIXME: implements it
+}
+
+int64_t SrsHttpConn::get_send_bytes_delta()
+{
+    // TODO: FIXME: implements it
+    return 0;
+}
+
+int64_t SrsHttpConn::get_recv_bytes_delta()
+{
+    // TODO: FIXME: implements it
+    return 0;
+}
+
 int SrsHttpConn::do_cycle()
 {
     int ret = ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_http_conn.hpp b/trunk/src/app/srs_app_http_conn.hpp
index 439ff987e..0dc35d0da 100644
--- a/trunk/src/app/srs_app_http_conn.hpp
+++ b/trunk/src/app/srs_app_http_conn.hpp
@@ -90,6 +90,12 @@ private:
 public:
     SrsHttpConn(SrsServer* srs_server, st_netfd_t client_stfd, SrsHttpHandler* _handler);
     virtual ~SrsHttpConn();
+public:
+    virtual void kbps_resample();
+// interface IKbpsDelta
+public:
+    virtual int64_t get_send_bytes_delta();
+    virtual int64_t get_recv_bytes_delta();
 protected:
     virtual int do_cycle();
 private:
diff --git a/trunk/src/app/srs_app_kbps.cpp b/trunk/src/app/srs_app_kbps.cpp
index fb6a3e54a..3507227c7 100644
--- a/trunk/src/app/srs_app_kbps.cpp
+++ b/trunk/src/app/srs_app_kbps.cpp
@@ -38,7 +38,7 @@ SrsKbpsSlice::SrsKbpsSlice()
 {
     io.in = NULL;
     io.out = NULL;
-    last_bytes = io_bytes_base = starttime = bytes = 0;
+    last_bytes = io_bytes_base = starttime = bytes = delta_bytes = 0;
 }
 
 SrsKbpsSlice::~SrsKbpsSlice()
@@ -98,6 +98,14 @@ void SrsKbpsSlice::sample()
     }
 }
 
+IKbpsDelta::IKbpsDelta()
+{
+}
+
+IKbpsDelta::~IKbpsDelta()
+{
+}
+
 SrsKbps::SrsKbps()
 {
 }
@@ -165,22 +173,22 @@ int SrsKbps::get_recv_kbps()
     return bytes * 8 / duration;
 }
 
-int SrsKbps::get_send_kbps_sample_high()
+int SrsKbps::get_send_kbps_30s()
 {
     return os.sample_30s.kbps;
 }
 
-int SrsKbps::get_recv_kbps_sample_high()
+int SrsKbps::get_recv_kbps_30s()
 {
     return is.sample_30s.kbps;
 }
 
-int SrsKbps::get_send_kbps_sample_medium()
+int SrsKbps::get_send_kbps_5m()
 {
     return os.sample_5m.kbps;
 }
 
-int SrsKbps::get_recv_kbps_sample_medium()
+int SrsKbps::get_recv_kbps_5m()
 {
     return is.sample_5m.kbps;
 }
@@ -195,20 +203,44 @@ int64_t SrsKbps::get_recv_bytes()
     return is.get_total_bytes();
 }
 
+int64_t SrsKbps::get_send_bytes_delta()
+{
+    int64_t delta = os.get_total_bytes() - os.delta_bytes;
+    os.delta_bytes = os.get_total_bytes();
+    return delta;
+}
+
+int64_t SrsKbps::get_recv_bytes_delta()
+{
+    int64_t delta = is.get_total_bytes() - is.delta_bytes;
+    is.delta_bytes = is.get_total_bytes();
+    return delta;
+}
+
+void SrsKbps::add_delta(IKbpsDelta* delta)
+{
+    srs_assert(delta);
+    
+    // update the total bytes
+    is.last_bytes += delta->get_recv_bytes_delta();
+    os.last_bytes += delta->get_send_bytes_delta();
+    
+    // we donot sample, please use sample() to do resample.
+}
+
 void SrsKbps::sample()
 {
+    // update the total bytes
     if (os.io.out) {
         os.last_bytes = os.io.out->get_send_bytes();
     }
     
-    // resample
-    os.sample();
-    
     if (is.io.in) {
         is.last_bytes = is.io.in->get_recv_bytes();
     }
     
     // resample
     is.sample();
+    os.sample();
 }
 
diff --git a/trunk/src/app/srs_app_kbps.hpp b/trunk/src/app/srs_app_kbps.hpp
index daea8f5fc..e6aa257ea 100644
--- a/trunk/src/app/srs_app_kbps.hpp
+++ b/trunk/src/app/srs_app_kbps.hpp
@@ -30,8 +30,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <srs_core.hpp>
 
-class ISrsProtocolStatistic;
-class ISrsProtocolStatistic;
+#include <srs_protocol_io.hpp>
 
 /**
 * a kbps sample, for example, 1minute kbps, 
@@ -59,7 +58,8 @@ public:
 *       send_bytes = bytes + last_bytes - io_bytes_base
 * so, the bytes sent duration current session is:
 *       send_bytes = last_bytes - io_bytes_base
-* @remark user use set_io to start new session.
+* @remark use set_io to start new session.
+* @remakr the slice is a data collection object driven by SrsKbps.
 */
 class SrsKbpsSlice
 {
@@ -69,6 +69,8 @@ private:
         ISrsProtocolStatistic* out;
     };
 public:
+    // the slice io used for SrsKbps to invoke,
+    // the SrsKbpsSlice itself never use it.
     slice_io io;
     // session startup bytes
     // @remark, use total_bytes() to get the total bytes of slice.
@@ -86,6 +88,9 @@ public:
     SrsKbpsSample sample_1m;
     SrsKbpsSample sample_5m;
     SrsKbpsSample sample_60m;
+public:
+    // for the delta bytes.
+    int64_t delta_bytes;
 public:
     SrsKbpsSlice();
     virtual ~SrsKbpsSlice();
@@ -101,9 +106,36 @@ public:
 };
 
 /**
-* to statistic the kbps of io.
+* the interface which provices delta of bytes.
 */
-class SrsKbps
+class IKbpsDelta
+{
+public:
+    IKbpsDelta();
+    virtual ~IKbpsDelta();
+public:
+    virtual int64_t get_send_bytes_delta() = 0;
+    virtual int64_t get_recv_bytes_delta() = 0;
+};
+
+/**
+* to statistic the kbps of io.
+* itself can be a statistic source, for example, used for SRS bytes stat.
+* there are two usage scenarios:
+* 1. connections to calc kbps:
+*       set_io(in, out)
+*       sample()
+*       get_xxx_kbps().
+*   the connections know how many bytes already send/recv.
+* 2. server to calc kbps:
+*       set_io(NULL, NULL)
+*       for each connection in connections:
+*           add_delta(connections) // where connection is a IKbpsDelta*
+*       sample()
+*       get_xxx_kbps().
+*   the server never know how many bytes already send/recv, for the connection maybe closed.
+*/
+class SrsKbps : public virtual ISrsProtocolStatistic, public virtual IKbpsDelta
 {
 private:
     SrsKbpsSlice is;
@@ -130,11 +162,11 @@ public:
     virtual int get_send_kbps();
     virtual int get_recv_kbps();
     // 30s
-    virtual int get_send_kbps_sample_high();
-    virtual int get_recv_kbps_sample_high();
+    virtual int get_send_kbps_30s();
+    virtual int get_recv_kbps_30s();
     // 5m
-    virtual int get_send_kbps_sample_medium();
-    virtual int get_recv_kbps_sample_medium();
+    virtual int get_send_kbps_5m();
+    virtual int get_recv_kbps_5m();
 public:
     /**
     * get the total send/recv bytes, from the startup of the oldest io.
@@ -142,9 +174,26 @@ public:
     */
     virtual int64_t get_send_bytes();
     virtual int64_t get_recv_bytes();
+    /**
+    * get the delta of send/recv bytes.
+    * @remark, used for add_delta to calc the total system bytes/kbps.
+    */
+    virtual int64_t get_send_bytes_delta();
+    virtual int64_t get_recv_bytes_delta();
 public:
     /**
-    * resample all samples.
+    * add delta to kbps clac mechenism.
+    * we donot know the total bytes, but know the delta, for instance, 
+    * for rtmp server to calc total bytes and kbps.
+    * @remark user must invoke sample() when invoke this method.
+    * @param delta, assert should never be NULL.
+    */
+    virtual void add_delta(IKbpsDelta* delta);
+    /**
+    * resample all samples, ignore if in/out is NULL.
+    * used for user to calc the kbps, to sample new kbps value.
+    * @remark if user, for instance, the rtmp server to calc the total bytes,
+    *       use the add_delta() is better solutions.
     */
     virtual void sample();
 };
diff --git a/trunk/src/app/srs_app_rtmp_conn.cpp b/trunk/src/app/srs_app_rtmp_conn.cpp
index a6622ff0c..615d7230d 100644
--- a/trunk/src/app/srs_app_rtmp_conn.cpp
+++ b/trunk/src/app/srs_app_rtmp_conn.cpp
@@ -94,6 +94,11 @@ SrsRtmpConn::~SrsRtmpConn()
     srs_freep(kbps);
 }
 
+void SrsRtmpConn::kbps_resample()
+{
+    kbps->sample();
+}
+
 // TODO: return detail message when error for client.
 int SrsRtmpConn::do_cycle()
 {
@@ -168,6 +173,16 @@ int SrsRtmpConn::on_reload_vhost_removed(string vhost)
     
     return ret;
 }
+
+int64_t SrsRtmpConn::get_send_bytes_delta()
+{
+    return kbps->get_send_bytes_delta();
+}
+
+int64_t SrsRtmpConn::get_recv_bytes_delta()
+{
+    return kbps->get_recv_bytes_delta();
+}
     
 int SrsRtmpConn::service_cycle()
 {    
@@ -510,8 +525,8 @@ int SrsRtmpConn::playing(SrsSource* source)
             srs_trace("-> "SRS_LOG_ID_PLAY
                 " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d", 
                 pithy_print.age(), count,
-                kbps->get_send_kbps(), kbps->get_send_kbps_sample_high(), kbps->get_send_kbps_sample_medium(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_sample_high(), kbps->get_recv_kbps_sample_medium());
+                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
         }
         
         if (count <= 0) {
@@ -601,8 +616,8 @@ int SrsRtmpConn::fmle_publish(SrsSource* source)
             kbps->sample();
             srs_trace("<- "SRS_LOG_ID_CLIENT_PUBLISH
                 " time=%"PRId64", okbps=%d,%d,%d, ikbps=%d,%d,%d", pithy_print.age(), 
-                kbps->get_send_kbps(), kbps->get_send_kbps_sample_high(), kbps->get_send_kbps_sample_medium(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_sample_high(), kbps->get_recv_kbps_sample_medium());
+                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
         }
     
         // process UnPublish event.
@@ -683,8 +698,8 @@ int SrsRtmpConn::flash_publish(SrsSource* source)
             srs_trace("<- "SRS_LOG_ID_WEB_PUBLISH
                 " time=%"PRId64", okbps=%d,%d,%d, ikbps=%d,%d,%d", 
                 pithy_print.age(),
-                kbps->get_send_kbps(), kbps->get_send_kbps_sample_high(), kbps->get_send_kbps_sample_medium(),
-                kbps->get_recv_kbps(), kbps->get_recv_kbps_sample_high(), kbps->get_recv_kbps_sample_medium());
+                kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m());
         }
     
         // process UnPublish event.
diff --git a/trunk/src/app/srs_app_rtmp_conn.hpp b/trunk/src/app/srs_app_rtmp_conn.hpp
index d2e47a14a..2566f2b30 100644
--- a/trunk/src/app/srs_app_rtmp_conn.hpp
+++ b/trunk/src/app/srs_app_rtmp_conn.hpp
@@ -51,7 +51,7 @@ class SrsKbps;
 /**
 * the client provides the main logic control for RTMP clients.
 */
-class SrsRtmpConn : public SrsConnection, public ISrsReloadHandler
+class SrsRtmpConn : public virtual SrsConnection, public virtual ISrsReloadHandler
 {
 private:
     SrsRequest* req;
@@ -68,11 +68,17 @@ private:
 public:
     SrsRtmpConn(SrsServer* srs_server, st_netfd_t client_stfd);
     virtual ~SrsRtmpConn();
+public:
+    virtual void kbps_resample();
 protected:
     virtual int do_cycle();
 // interface ISrsReloadHandler
 public:
     virtual int on_reload_vhost_removed(std::string vhost);
+// interface IKbpsDelta
+public:
+    virtual int64_t get_send_bytes_delta();
+    virtual int64_t get_recv_bytes_delta();
 private:
     // when valid and connected to vhost/app, service the client.
     virtual int service_cycle();
diff --git a/trunk/src/app/srs_app_server.cpp b/trunk/src/app/srs_app_server.cpp
index 76ac96a60..025aa1f81 100644
--- a/trunk/src/app/srs_app_server.cpp
+++ b/trunk/src/app/srs_app_server.cpp
@@ -45,6 +45,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_source.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_app_heartbeat.hpp>
+#include <srs_app_kbps.hpp>
 
 // signal defines.
 #define SIGNAL_RELOAD SIGHUP
@@ -82,6 +83,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //      SRS_SYS_CYCLE_INTERVAL * SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES
 #define SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES 90
 
+// update network devices info interval:
+//      SRS_SYS_CYCLE_INTERVAL * SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES
+#define SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES 90
+
 SrsListener::SrsListener(SrsServer* server, SrsListenerType type)
 {
     fd = -1;
@@ -312,7 +317,8 @@ SrsServer::SrsServer()
     signal_gmc_stop = false;
     pid_fd = -1;
     
-    signal_manager = new SrsSignalManager(this);
+    signal_manager = NULL;
+    kbps = NULL;
     
     // donot new object in constructor,
     // for some global instance is not ready now,
@@ -372,6 +378,7 @@ void SrsServer::destroy()
     }
     
     srs_freep(signal_manager);
+    srs_freep(kbps);
     
     for (std::vector<SrsConnection*>::iterator it = conns.begin(); it != conns.end();) {
         SrsConnection* conn = *it;
@@ -398,6 +405,13 @@ int SrsServer::initialize()
     srs_assert(_srs_config);
     _srs_config->subscribe(this);
     
+    srs_assert(!signal_manager);
+    signal_manager = new SrsSignalManager(this);
+    
+    srs_assert(!kbps);
+    kbps = new SrsKbps();
+    kbps->set_io(NULL, NULL);
+    
 #ifdef SRS_AUTO_HTTP_API
     srs_assert(!http_api_handler);
     http_api_handler = SrsHttpHandler::create_http_api();
@@ -610,6 +624,9 @@ void SrsServer::remove(SrsConnection* conn)
     
     srs_info("conn removed. conns=%d", (int)conns.size());
     
+    // resample the resource of specified connection.
+    resample_kbps(conn);
+    
     // all connections are created by server,
     // so we free it here.
     srs_freep(conn);
@@ -651,11 +668,12 @@ int SrsServer::do_cycle()
     max = srs_max(max, SRS_SYS_MEMINFO_RESOLUTION_TIMES);
     max = srs_max(max, SRS_SYS_PLATFORM_INFO_RESOLUTION_TIMES);
     max = srs_max(max, SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES);
+    max = srs_max(max, SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES);
     
     // the deamon thread, update the time cache
     while (true) {
         // the interval in config.
-        int64_t heartbeat_max_resolution = _srs_config->get_heartbeat_interval() / 100;
+        int heartbeat_max_resolution = (int)(_srs_config->get_heartbeat_interval() / 100);
         
         // dynamic fetch the max.
         int __max = max;
@@ -689,30 +707,43 @@ int SrsServer::do_cycle()
             
             // update the cache time or rusage.
             if ((i % SRS_SYS_TIME_RESOLUTION_MS_TIMES) == 0) {
+                srs_info("update current time cache.");
                 srs_update_system_time_ms();
             }
             if ((i % SRS_SYS_RUSAGE_RESOLUTION_TIMES) == 0) {
+                srs_info("update resource info, rss.");
                 srs_update_system_rusage();
             }
             if ((i % SRS_SYS_CPU_STAT_RESOLUTION_TIMES) == 0) {
+                srs_info("update cpu info, usage.");
                 srs_update_proc_stat();
             }
             if ((i % SRS_SYS_MEMINFO_RESOLUTION_TIMES) == 0) {
+                srs_info("update memory info, usage/free.");
                 srs_update_meminfo();
             }
             if ((i % SRS_SYS_PLATFORM_INFO_RESOLUTION_TIMES) == 0) {
+                srs_info("update platform info, uptime/load.");
                 srs_update_platform_info();
             }
             if ((i % SRS_SYS_NETWORK_DEVICE_RESOLUTION_TIMES) == 0) {
+                srs_info("update network devices info.");
                 srs_update_network_devices();
             }
+            if ((i % SRS_SYS_NETWORK_RTMP_SERVER_RESOLUTION_TIMES) == 0) {
+                srs_info("update network rtmp server info.");
+                resample_kbps(NULL);
+                srs_update_rtmp_server(kbps);
+            }
 #ifdef SRS_AUTO_HTTP_PARSER
             if (_srs_config->get_heartbeat_enabled()) {
                 if ((i % heartbeat_max_resolution) == 0) {
+                    srs_info("do http heartbeat, for internal server to report.");
                     http_heartbeat->heartbeat();
                 }
             }
 #endif
+            srs_info("server main thread loop");
         }
     }
 
@@ -801,6 +832,32 @@ void SrsServer::close_listeners(SrsListenerType type)
     }
 }
 
+void SrsServer::resample_kbps(SrsConnection* conn, bool do_resample)
+{
+    // resample all when conn is NULL.
+    if (!conn) {
+        for (std::vector<SrsConnection*>::iterator it = conns.begin(); it != conns.end(); ++it) {
+            SrsConnection* client = *it;
+            srs_assert(client);
+            
+            // only resample, do resample when all finished.
+            resample_kbps(client, false);
+        }
+        
+        kbps->sample();
+        return;
+    }
+    
+    // resample for connection.
+    conn->kbps_resample();
+    
+    kbps->add_delta(conn);
+    
+    if (do_resample) {
+        kbps->sample();
+    }
+}
+
 int SrsServer::accept_client(SrsListenerType type, st_netfd_t client_stfd)
 {
     int ret = ERROR_SUCCESS;
diff --git a/trunk/src/app/srs_app_server.hpp b/trunk/src/app/srs_app_server.hpp
index a9bc4a662..3f7dac932 100644
--- a/trunk/src/app/srs_app_server.hpp
+++ b/trunk/src/app/srs_app_server.hpp
@@ -41,6 +41,7 @@ class SrsConnection;
 class SrsHttpHandler;
 class SrsIngester;
 class SrsHttpHeartbeat;
+class SrsKbps;
 
 // listener type for server to identify the connection,
 // that is, use different type to process the connection.
@@ -107,6 +108,10 @@ private:
     static void sig_catcher(int signo);
 };
 
+/**
+* SRS RTMP server, initialize and listen, 
+* start connection service thread, destroy client.
+*/
 class SrsServer : public ISrsReloadHandler
 {
 private:
@@ -127,6 +132,7 @@ private:
     std::vector<SrsConnection*> conns;
     std::vector<SrsListener*> listeners;
     SrsSignalManager* signal_manager;
+    SrsKbps* kbps;
     bool signal_reload;
     bool signal_gmc_stop;
 public:
@@ -150,6 +156,8 @@ private:
     virtual int listen_http_api();
     virtual int listen_http_stream();
     virtual void close_listeners(SrsListenerType type);
+    // resample the server kbps. resample all when conn is NULL.
+    virtual void resample_kbps(SrsConnection* conn, bool do_resample = true);
 // internal only
 public:
     virtual int accept_client(SrsListenerType type, st_netfd_t client_stfd);
diff --git a/trunk/src/app/srs_app_utility.cpp b/trunk/src/app/srs_app_utility.cpp
index 023b94d72..23d658bd0 100644
--- a/trunk/src/app/srs_app_utility.cpp
+++ b/trunk/src/app/srs_app_utility.cpp
@@ -34,6 +34,7 @@ using namespace std;
 #include <srs_app_config.hpp>
 #include <srs_kernel_utility.hpp>
 #include <srs_kernel_error.hpp>
+#include <srs_app_kbps.hpp>
 
 #define SRS_LOCAL_LOOP_IP "127.0.0.1"
 
@@ -523,6 +524,38 @@ void srs_update_network_devices()
     }
 }
 
+SrsNetworkRtmpServer::SrsNetworkRtmpServer()
+{
+    ok = false;
+    sample_time = rbytes = sbytes = 0;
+}
+
+static SrsNetworkRtmpServer _srs_network_rtmp_server;
+
+SrsNetworkRtmpServer* srs_get_network_rtmp_server()
+{
+    return &_srs_network_rtmp_server;
+}
+
+void srs_update_rtmp_server(SrsKbps* kbps)
+{
+    SrsNetworkRtmpServer& r = _srs_network_rtmp_server;
+    
+    r.ok = true;
+    
+    r.sample_time = srs_get_system_time_ms();
+    
+    r.rbytes = kbps->get_recv_bytes();
+    r.rkbps = kbps->get_recv_kbps();
+    r.rkbps_30s = kbps->get_recv_kbps_30s();
+    r.rkbps_5m = kbps->get_recv_kbps_5m();
+    
+    r.sbytes = kbps->get_send_bytes();
+    r.skbps = kbps->get_send_kbps();
+    r.skbps_30s = kbps->get_send_kbps_30s();
+    r.skbps_5m = kbps->get_send_kbps_5m();
+}
+
 vector<string> _srs_system_ipv4_ips;
 
 void retrieve_local_ipv4_ips()
diff --git a/trunk/src/app/srs_app_utility.hpp b/trunk/src/app/srs_app_utility.hpp
index a7fec02a4..dedfc6a53 100644
--- a/trunk/src/app/srs_app_utility.hpp
+++ b/trunk/src/app/srs_app_utility.hpp
@@ -35,6 +35,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 #include <sys/resource.h>
 
+class SrsKbps;
+
 /**
 * convert level in string to log level in int.
 * @return the log level defined in SrsLogLevel.
@@ -390,6 +392,36 @@ extern int srs_get_network_devices_count();
 // the deamon st-thread will update it.
 extern void srs_update_network_devices();
 
+// srs rtmp network summary
+class SrsNetworkRtmpServer
+{
+public:
+    // whether the network device is ok.
+    bool ok;
+    
+    // the sample time in ms.
+    int64_t sample_time;
+    
+    // data for receive.
+    int64_t rbytes;
+    int rkbps;
+    int rkbps_30s;
+    int rkbps_5m;
+    
+    // data for transmit
+    int64_t sbytes;
+    int skbps;
+    int skbps_30s;
+    int skbps_5m;
+    
+    SrsNetworkRtmpServer();
+};
+    
+// get network devices info, use cache to avoid performance problem.
+extern SrsNetworkRtmpServer* srs_get_network_rtmp_server();
+// the deamon st-thread will update it.
+extern void srs_update_rtmp_server(SrsKbps* kbps);
+
 // get local ip, fill to @param ips
 extern void srs_retrieve_local_ipv4_ips();
 extern std::vector<std::string>& srs_get_local_ipv4_ips();
diff --git a/trunk/src/core/srs_core.hpp b/trunk/src/core/srs_core.hpp
index 0b346bd63..9bc6d3c57 100644
--- a/trunk/src/core/srs_core.hpp
+++ b/trunk/src/core/srs_core.hpp
@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 #define VERSION_MAJOR "0"
 #define VERSION_MINOR "9"
-#define VERSION_REVISION "125"
+#define VERSION_REVISION "126"
 #define RTMP_SIG_SRS_VERSION VERSION_MAJOR"."VERSION_MINOR"."VERSION_REVISION
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"