fix #241, add mw(merged-write) config. 2.0.53

@@ -485,6 +485,7 @@ Supported operating systems and hardware:
 * 2013-10-17, Created.<br/>
 * 2013-10-17, Created.<br/>
 
 
 ## History
 ## History
+* v2.0, 2014-12-04, fix [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241), add mw(merged-write) config. 2.0.53
 * v2.0, 2014-12-04, for [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241), support mr(merged-read) config and reload. 2.0.52.
 * v2.0, 2014-12-04, for [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241), support mr(merged-read) config and reload. 2.0.52.
 * v2.0, 2014-12-04, enable [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241) and [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), +25% performance, 2.5k publisher. 2.0.50
 * v2.0, 2014-12-04, enable [#241](https://github.com/winlinvip/simple-rtmp-server/issues/241) and [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), +25% performance, 2.5k publisher. 2.0.50
 * v2.0, 2014-12-04, fix [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), improve about 15% performance for fast buffer. 2.0.49
 * v2.0, 2014-12-04, fix [#248](https://github.com/winlinvip/simple-rtmp-server/issues/248), improve about 15% performance for fast buffer. 2.0.49

@@ -143,7 +143,8 @@ vhost __defaultVhost__ {
 }
 }
 
 
 # the MR(merged-read) setting for publisher.
 # the MR(merged-read) setting for publisher.
-vhost mr.srs.com {
+# the MW(merged-write) settings for player.
+vhost mrw.srs.com {
     # about MR, read https://github.com/winlinvip/simple-rtmp-server/issues/241
     # about MR, read https://github.com/winlinvip/simple-rtmp-server/issues/241
     mr {
     mr {
         # whether enable the MR(merged-read)
         # whether enable the MR(merged-read)
@@ -160,6 +161,11 @@ vhost mr.srs.com {
         # default: 500
         # default: 500
         latency     500;
         latency     500;
     }
     }
+    # set the MW(merged-write) latency in ms. 
+    # SRS always set mw on, so we just set the latency value.
+    # the latency of stream >= mw_latency + mr_latency
+    # default: 500
+    mw_latency      500;
 }
 }
 
 
 # vhost for edge, edge and origin is the same vhost
 # vhost for edge, edge and origin is the same vhost

@@ -45,6 +45,7 @@ using namespace std;
 #include <srs_app_source.hpp>
 #include <srs_app_source.hpp>
 #include <srs_kernel_file.hpp>
 #include <srs_kernel_file.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_app_utility.hpp>
+#include <srs_core_performance.hpp>
 
 
 using namespace _srs_internal;
 using namespace _srs_internal;
 
 
@@ -829,6 +830,17 @@ int SrsConfig::reload_vhost(SrsConfDirective* old_root)
                 }
                 }
                 srs_trace("vhost %s reload mr success.", vhost.c_str());
                 srs_trace("vhost %s reload mr success.", vhost.c_str());
             }
             }
+            // mw, only one per vhost
+            if (!srs_directive_equals(new_vhost->get("mw_latency"), old_vhost->get("mw_latency"))) {
+                for (it = subscribes.begin(); it != subscribes.end(); ++it) {
+                    ISrsReloadHandler* subscribe = *it;
+                    if ((ret = subscribe->on_reload_vhost_mw(vhost)) != ERROR_SUCCESS) {
+                        srs_error("vhost %s notify subscribes mw failed. ret=%d", vhost.c_str(), ret);
+                        return ret;
+                    }
+                }
+                srs_trace("vhost %s reload mw success.", vhost.c_str());
+            }
             // http, only one per vhost.
             // http, only one per vhost.
             if (!srs_directive_equals(new_vhost->get("http"), old_vhost->get("http"))) {
             if (!srs_directive_equals(new_vhost->get("http"), old_vhost->get("http"))) {
                 for (it = subscribes.begin(); it != subscribes.end(); ++it) {
                 for (it = subscribes.begin(); it != subscribes.end(); ++it) {
@@ -1327,7 +1339,7 @@ int SrsConfig::check_config()
                 && n != "time_jitter" 
                 && n != "time_jitter" 
                 && n != "atc" && n != "atc_auto"
                 && n != "atc" && n != "atc_auto"
                 && n != "debug_srs_upnode"
                 && n != "debug_srs_upnode"
-                && n != "mr"
+                && n != "mr" && n != "mw_latency"
             ) {
             ) {
                 ret = ERROR_SYSTEM_CONFIG_INVALID;
                 ret = ERROR_SYSTEM_CONFIG_INVALID;
                 srs_error("unsupported vhost directive %s, ret=%d", n.c_str(), ret);
                 srs_error("unsupported vhost directive %s, ret=%d", n.c_str(), ret);
@@ -1951,7 +1963,7 @@ bool SrsConfig::get_gop_cache(string vhost)
     SrsConfDirective* conf = get_vhost(vhost);
     SrsConfDirective* conf = get_vhost(vhost);
 
 
     if (!conf) {
     if (!conf) {
-        return true;
+        return SRS_PERF_GOP_CACHE;
     }
     }
     
     
     conf = conf->get("gop_cache");
     conf = conf->get("gop_cache");
@@ -1959,7 +1971,7 @@ bool SrsConfig::get_gop_cache(string vhost)
         return false;
         return false;
     }
     }
     
     
-    return true;
+    return SRS_PERF_GOP_CACHE;
 }
 }
 
 
 bool SrsConfig::get_debug_srs_upnode(string vhost)
 bool SrsConfig::get_debug_srs_upnode(string vhost)
@@ -2032,12 +2044,12 @@ double SrsConfig::get_queue_length(string vhost)
     SrsConfDirective* conf = get_vhost(vhost);
     SrsConfDirective* conf = get_vhost(vhost);
 
 
     if (!conf) {
     if (!conf) {
-        return SRS_CONF_DEFAULT_QUEUE_LENGTH;
+        return SRS_PERF_PLAY_QUEUE;
     }
     }
     
     
     conf = conf->get("queue_length");
     conf = conf->get("queue_length");
     if (!conf || conf->arg0().empty()) {
     if (!conf || conf->arg0().empty()) {
-        return SRS_CONF_DEFAULT_QUEUE_LENGTH;
+        return SRS_PERF_PLAY_QUEUE;
     }
     }
     
     
     return ::atoi(conf->arg0().c_str());
     return ::atoi(conf->arg0().c_str());
@@ -2106,17 +2118,17 @@ bool SrsConfig::get_mr_enabled(string vhost)
     SrsConfDirective* conf = get_vhost(vhost);
     SrsConfDirective* conf = get_vhost(vhost);
 
 
     if (!conf) {
     if (!conf) {
-        return SRS_CONSTS_RTMP_MR;
+        return SRS_PERF_MR_ENABLED;
     }
     }
 
 
     conf = conf->get("mr");
     conf = conf->get("mr");
     if (!conf) {
     if (!conf) {
-        return SRS_CONSTS_RTMP_MR;
+        return SRS_PERF_MR_ENABLED;
     }
     }
 
 
     conf = conf->get("enabled");
     conf = conf->get("enabled");
     if (!conf || conf->arg0() != "on") {
     if (!conf || conf->arg0() != "on") {
-        return SRS_CONSTS_RTMP_MR;
+        return SRS_PERF_MR_ENABLED;
     }
     }
 
 
     return true;
     return true;
@@ -2128,17 +2140,34 @@ int SrsConfig::get_mr_sleep_ms(string vhost)
     SrsConfDirective* conf = get_vhost(vhost);
     SrsConfDirective* conf = get_vhost(vhost);
 
 
     if (!conf) {
     if (!conf) {
-        return SRS_CONSTS_RTMP_MR_SLEEP;
+        return SRS_PERF_MR_SLEEP;
     }
     }
 
 
     conf = conf->get("mr");
     conf = conf->get("mr");
     if (!conf) {
     if (!conf) {
-        return SRS_CONSTS_RTMP_MR_SLEEP;
+        return SRS_PERF_MR_SLEEP;
     }
     }
 
 
     conf = conf->get("latency");
     conf = conf->get("latency");
     if (!conf || conf->arg0().empty()) {
     if (!conf || conf->arg0().empty()) {
-        return SRS_CONSTS_RTMP_MR_SLEEP;
+        return SRS_PERF_MR_SLEEP;
+    }
+
+    return ::atoi(conf->arg0().c_str());
+}
+
+int SrsConfig::get_mw_sleep_ms(string vhost)
+{
+
+    SrsConfDirective* conf = get_vhost(vhost);
+
+    if (!conf) {
+        return SRS_PERF_MW_SLEEP;
+    }
+
+    conf = conf->get("mw_latency");
+    if (!conf || conf->arg0().empty()) {
+        return SRS_PERF_MW_SLEEP;
     }
     }
 
 
     return ::atoi(conf->arg0().c_str());
     return ::atoi(conf->arg0().c_str());

@@ -54,8 +54,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define SRS_CONF_DEFAULT_DVR_PLAN SRS_CONF_DEFAULT_DVR_PLAN_SESSION
 #define SRS_CONF_DEFAULT_DVR_PLAN SRS_CONF_DEFAULT_DVR_PLAN_SESSION
 #define SRS_CONF_DEFAULT_DVR_DURATION 30
 #define SRS_CONF_DEFAULT_DVR_DURATION 30
 #define SRS_CONF_DEFAULT_TIME_JITTER "full"
 #define SRS_CONF_DEFAULT_TIME_JITTER "full"
-// in seconds, the live queue length.
-#define SRS_CONF_DEFAULT_QUEUE_LENGTH 30
 // in seconds, the paused queue length.
 // in seconds, the paused queue length.
 #define SRS_CONF_DEFAULT_PAUSED_LENGTH 10
 #define SRS_CONF_DEFAULT_PAUSED_LENGTH 10
 // the interval in seconds for bandwidth check
 // the interval in seconds for bandwidth check
@@ -541,6 +539,12 @@ public:
     */
     */
     // TODO: FIXME: add utest for mr config.
     // TODO: FIXME: add utest for mr config.
     virtual int                 get_mr_sleep_ms(std::string vhost);
     virtual int                 get_mr_sleep_ms(std::string vhost);
+    /**
+    * get the mw sleep time in ms for vhost.
+    * @param vhost, the vhost to get the mw sleep time.
+    */
+    // TODO: FIXME: add utest for mw config.
+    virtual int                 get_mw_sleep_ms(std::string vhost);
 private:
 private:
     /**
     /**
     * get the global chunk size.
     * get the global chunk size.

@@ -145,6 +145,11 @@ int ISrsReloadHandler::on_reload_vhost_mr(string /*vhost*/)
     return ERROR_SUCCESS;
     return ERROR_SUCCESS;
 }
 }
 
 
+int ISrsReloadHandler::on_reload_vhost_mw(string /*vhost*/)
+{
+    return ERROR_SUCCESS;
+}
+
 int ISrsReloadHandler::on_reload_vhost_transcode(string /*vhost*/)
 int ISrsReloadHandler::on_reload_vhost_transcode(string /*vhost*/)
 {
 {
     return ERROR_SUCCESS;
     return ERROR_SUCCESS;

@@ -66,6 +66,7 @@ public:
     virtual int on_reload_vhost_hls(std::string vhost);
     virtual int on_reload_vhost_hls(std::string vhost);
     virtual int on_reload_vhost_dvr(std::string vhost);
     virtual int on_reload_vhost_dvr(std::string vhost);
     virtual int on_reload_vhost_mr(std::string vhost);
     virtual int on_reload_vhost_mr(std::string vhost);
+    virtual int on_reload_vhost_mw(std::string vhost);
     virtual int on_reload_vhost_transcode(std::string vhost);
     virtual int on_reload_vhost_transcode(std::string vhost);
     virtual int on_reload_ingest_removed(std::string vhost, std::string ingest_id);
     virtual int on_reload_ingest_removed(std::string vhost, std::string ingest_id);
     virtual int on_reload_ingest_added(std::string vhost, std::string ingest_id);
     virtual int on_reload_ingest_added(std::string vhost, std::string ingest_id);

@@ -83,6 +83,7 @@ SrsRtmpConn::SrsRtmpConn(SrsServer* srs_server, st_netfd_t client_stfd)
     duration = 0;
     duration = 0;
     kbps = new SrsKbps();
     kbps = new SrsKbps();
     kbps->set_io(skt, skt);
     kbps->set_io(skt, skt);
+    mw_sleep = SRS_PERF_MW_SLEEP;
     
     
     _srs_config->subscribe(this);
     _srs_config->subscribe(this);
 }
 }
@@ -209,6 +210,13 @@ int SrsRtmpConn::on_reload_vhost_removed(string vhost)
     return ret;
     return ret;
 }
 }
 
 
+int SrsRtmpConn::on_reload_vhost_mw(string /*vhost*/)
+{
+    mw_sleep = _srs_config->get_mw_sleep_ms(req->vhost);
+
+    return ERROR_SUCCESS;
+}
+
 int64_t SrsRtmpConn::get_send_bytes_delta()
 int64_t SrsRtmpConn::get_send_bytes_delta()
 {
 {
     return kbps->get_send_bytes_delta();
     return kbps->get_send_bytes_delta();
@@ -361,7 +369,7 @@ int SrsRtmpConn::stream_service_cycle()
     }
     }
     
     
     bool enabled_cache = _srs_config->get_gop_cache(req->vhost);
     bool enabled_cache = _srs_config->get_gop_cache(req->vhost);
-    srs_trace("source url=%s, ip=%s, cache=%d, is_edge=%d, source_id=%d[%d]", 
+    srs_trace("source url=%s, ip=%s, cache=%d, is_edge=%d, source_id=%d[%d]",
         req->get_stream_url().c_str(), ip.c_str(), enabled_cache, vhost_is_edge, 
         req->get_stream_url().c_str(), ip.c_str(), enabled_cache, vhost_is_edge, 
         source->source_id(), source->source_id());
         source->source_id(), source->source_id());
     source->set_cache(enabled_cache);
     source->set_cache(enabled_cache);
@@ -592,17 +600,18 @@ int SrsRtmpConn::do_playing(SrsSource* source, SrsQueueRecvThread* trd)
         // no message to send, sleep a while.
         // no message to send, sleep a while.
         if (count <= 0) {
         if (count <= 0) {
             srs_verbose("sleep for no messages to send");
             srs_verbose("sleep for no messages to send");
-            st_usleep(SRS_PERF_SEND_MSGS_CACHE * 1000);
+            st_usleep(mw_sleep * 1000);
         }
         }
 
 
         // reportable
         // reportable
         if (pithy_print.can_print()) {
         if (pithy_print.can_print()) {
             kbps->sample();
             kbps->sample();
             srs_trace("-> "SRS_CONSTS_LOG_PLAY
             srs_trace("-> "SRS_CONSTS_LOG_PLAY
-                " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d", 
+                " time=%"PRId64", msgs=%d, okbps=%d,%d,%d, ikbps=%d,%d,%d, mw=%d",
                 pithy_print.age(), count,
                 pithy_print.age(), count,
                 kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
                 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()
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m(),
+                mw_sleep
             );
             );
         }
         }
         
         
@@ -774,10 +783,14 @@ int SrsRtmpConn::do_publishing(SrsSource* source, SrsPublishRecvThread* trd)
         // reportable
         // reportable
         if (pithy_print.can_print()) {
         if (pithy_print.can_print()) {
             kbps->sample();
             kbps->sample();
+            bool mr = _srs_config->get_mr_enabled(req->vhost);
+            int mr_sleep = _srs_config->get_mr_sleep_ms(req->vhost);
             srs_trace("<- "SRS_CONSTS_LOG_CLIENT_PUBLISH
             srs_trace("<- "SRS_CONSTS_LOG_CLIENT_PUBLISH
-                " time=%"PRId64", okbps=%d,%d,%d, ikbps=%d,%d,%d", pithy_print.age(),
+                " time=%"PRId64", okbps=%d,%d,%d, ikbps=%d,%d,%d, mr=%d/%d", pithy_print.age(),
                 kbps->get_send_kbps(), kbps->get_send_kbps_30s(), kbps->get_send_kbps_5m(),
                 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());
+                kbps->get_recv_kbps(), kbps->get_recv_kbps_30s(), kbps->get_recv_kbps_5m(),
+                mr, mr_sleep
+            );
         }
         }
     }
     }
 
 

@@ -71,6 +71,8 @@ private:
     // @see https://github.com/winlinvip/simple-rtmp-server/issues/47
     // @see https://github.com/winlinvip/simple-rtmp-server/issues/47
     int64_t duration;
     int64_t duration;
     SrsKbps* kbps;
     SrsKbps* kbps;
+    // the MR(merged-write) sleep time in ms.
+    int mw_sleep;
 public:
 public:
     SrsRtmpConn(SrsServer* srs_server, st_netfd_t client_stfd);
     SrsRtmpConn(SrsServer* srs_server, st_netfd_t client_stfd);
     virtual ~SrsRtmpConn();
     virtual ~SrsRtmpConn();
@@ -81,6 +83,7 @@ protected:
 // interface ISrsReloadHandler
 // interface ISrsReloadHandler
 public:
 public:
     virtual int on_reload_vhost_removed(std::string vhost);
     virtual int on_reload_vhost_removed(std::string vhost);
+    virtual int on_reload_vhost_mw(std::string vhost);
 // interface IKbpsDelta
 // interface IKbpsDelta
 public:
 public:
     virtual int64_t get_send_bytes_delta();
     virtual int64_t get_send_bytes_delta();

@@ -31,7 +31,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // current release version
 // current release version
 #define VERSION_MAJOR       2
 #define VERSION_MAJOR       2
 #define VERSION_MINOR       0
 #define VERSION_MINOR       0
-#define VERSION_REVISION    52
+#define VERSION_REVISION    53
 // server info.
 // server info.
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_KEY "SRS"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"
 #define RTMP_SIG_SRS_ROLE "origin/edge server"
@@ -48,6 +48,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #define RTMP_SIG_SRS_HANDSHAKE RTMP_SIG_SRS_KEY"("RTMP_SIG_SRS_VERSION")"
 #define RTMP_SIG_SRS_HANDSHAKE RTMP_SIG_SRS_KEY"("RTMP_SIG_SRS_VERSION")"
 #define RTMP_SIG_SRS_RELEASE "https://github.com/winlinvip/simple-rtmp-server/tree/1.0release"
 #define RTMP_SIG_SRS_RELEASE "https://github.com/winlinvip/simple-rtmp-server/tree/1.0release"
 #define RTMP_SIG_SRS_HTTP_SERVER "https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_HTTPServer#feature"
 #define RTMP_SIG_SRS_HTTP_SERVER "https://github.com/winlinvip/simple-rtmp-server/wiki/v1_CN_HTTPServer#feature"
+#define RTMP_SIG_SRS_ISSUES(id) "https://github.com/winlinvip/simple-rtmp-server/issues/"#id
 #define RTMP_SIG_SRS_VERSION __SRS_XSTR(VERSION_MAJOR)"."__SRS_XSTR(VERSION_MINOR)"."__SRS_XSTR(VERSION_REVISION)
 #define RTMP_SIG_SRS_VERSION __SRS_XSTR(VERSION_MAJOR)"."__SRS_XSTR(VERSION_MINOR)"."__SRS_XSTR(VERSION_REVISION)
 
 
 // internal macros, covert macro values to str,
 // internal macros, covert macro values to str,

@@ -38,6 +38,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * to improve read performance, merge some packets then read,
 * to improve read performance, merge some packets then read,
 * when it on and read small bytes, we sleep to wait more data.,
 * when it on and read small bytes, we sleep to wait more data.,
 * that is, we merge some data to read together.
 * that is, we merge some data to read together.
+* @see SrsConfig::get_mr_enabled()
+* @see SrsConfig::get_mr_sleep_ms()
 * @see https://github.com/winlinvip/simple-rtmp-server/issues/241
 * @see https://github.com/winlinvip/simple-rtmp-server/issues/241
 * @example, for the default settings, this algorithm will use:
 * @example, for the default settings, this algorithm will use:
 *       that is, when got nread bytes smaller than 4KB, sleep(780ms).
 *       that is, when got nread bytes smaller than 4KB, sleep(780ms).
@@ -55,11 +57,14 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 * For example, sleep 120ms. Then there is, and always 120ms data in buffer.
 * For example, sleep 120ms. Then there is, and always 120ms data in buffer.
 * That is, the latency is 120ms(the sleep time).
 * That is, the latency is 120ms(the sleep time).
 */
 */
-// to enable merged read.
 #define SRS_PERF_MERGED_READ
 #define SRS_PERF_MERGED_READ
+// the default config of mr.
+#define SRS_PERF_MR_ENABLED false
+#define SRS_PERF_MR_SLEEP 500
 
 
 /**
 /**
-* the send cache time in ms.
+* the MW(merged-write) send cache time in ms.
+* the default value, user can override it in config.
 * to improve send performance, cache msgs and send in a time.
 * to improve send performance, cache msgs and send in a time.
 * for example, cache 500ms videos and audios, then convert all these
 * for example, cache 500ms videos and audios, then convert all these
 * msgs to iovecs, finally use writev to send.
 * msgs to iovecs, finally use writev to send.
@@ -67,8 +72,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *       the latency+ when cache+.
 *       the latency+ when cache+.
 * @remark the socket send buffer default to 185KB, it large enough.
 * @remark the socket send buffer default to 185KB, it large enough.
 * @see https://github.com/winlinvip/simple-rtmp-server/issues/194
 * @see https://github.com/winlinvip/simple-rtmp-server/issues/194
+* @see SrsConfig::get_mw_sleep_ms()
 */
 */
-#define SRS_PERF_SEND_MSGS_CACHE 500
+// the default config of mw.
+#define SRS_PERF_MW_SLEEP 500
 
 
 /**
 /**
 * how many chunk stream to cache, [0, N].
 * how many chunk stream to cache, [0, N].
@@ -78,5 +85,13 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 */
 #define SRS_PERF_CHUNK_STREAM_CACHE 16
 #define SRS_PERF_CHUNK_STREAM_CACHE 16
 
 
+/**
+* the gop cache and play cache queue.
+*/
+// whether gop cache is on.
+#define SRS_PERF_GOP_CACHE true
+// in seconds, the live queue length.
+#define SRS_PERF_PLAY_QUEUE 30
+
 #endif
 #endif
 
 

@@ -50,10 +50,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // 6. Chunking, RTMP protocol default chunk size.
 // 6. Chunking, RTMP protocol default chunk size.
 #define SRS_CONSTS_RTMP_PROTOCOL_CHUNK_SIZE 128
 #define SRS_CONSTS_RTMP_PROTOCOL_CHUNK_SIZE 128
 
 
-// the default setting of mr.
-#define SRS_CONSTS_RTMP_MR false
-#define SRS_CONSTS_RTMP_MR_SLEEP 500
-
 /**
 /**
 * 6. Chunking
 * 6. Chunking
 * The chunk size is configurable. It can be set using a control
 * The chunk size is configurable. It can be set using a control

@@ -39,6 +39,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_config.hpp>
 #include <srs_app_config.hpp>
 #include <srs_app_log.hpp>
 #include <srs_app_log.hpp>
 #include <srs_kernel_utility.hpp>
 #include <srs_kernel_utility.hpp>
+#include <srs_core_performance.hpp>
 
 
 // pre-declare
 // pre-declare
 int run();
 int run();
@@ -130,6 +131,24 @@ void show_macro_features()
 #else
 #else
     srs_warn("check feature compile ffmpeg: off");
     srs_warn("check feature compile ffmpeg: off");
 #endif
 #endif
+
+#ifdef SRS_PERF_MERGED_READ
+    srs_trace("MR(merged-read): on, @see %s", RTMP_SIG_SRS_ISSUES(241));
+#else
+    srs_warn("MR(merged-read): off, @see %s", RTMP_SIG_SRS_ISSUES(241));
+#endif
+
+    srs_trace("MR(merged-read) default %d sleep %d", SRS_PERF_MR_ENABLED, SRS_PERF_MR_SLEEP);
+    srs_trace("MW(merged-write) default sleep %d", SRS_PERF_MW_SLEEP);
+    srs_trace("read chunk stream cache cid [0, %d)", SRS_PERF_CHUNK_STREAM_CACHE);
+    srs_trace("default gop cache %d, play queue %ds", SRS_PERF_GOP_CACHE, SRS_PERF_PLAY_QUEUE);
+
+    int possible_mr_latency = 0;
+#ifdef SRS_PERF_MERGED_READ
+    possible_mr_latency = SRS_PERF_MR_SLEEP;
+#endif
+    srs_trace("system default latency in ms: mw(0-%d) + mr(0-%d) + play-queue(0-%d)",
+        SRS_PERF_MW_SLEEP, possible_mr_latency, SRS_PERF_PLAY_QUEUE*1000);
 }
 }
 
 
 void check_macro_features()
 void check_macro_features()
@@ -139,6 +158,10 @@ void check_macro_features()
     srs_warn("http server is dev feature, @see %s", RTMP_SIG_SRS_HTTP_SERVER);
     srs_warn("http server is dev feature, @see %s", RTMP_SIG_SRS_HTTP_SERVER);
 #endif
 #endif
 
 
+#ifndef SRS_PERF_MERGED_READ
+    srs_warn("MR(merged-read) is disabled, hurts read performance. @see %s", RTMP_SIG_SRS_ISSUES(241));
+#endif
+
 #if VERSION_MAJOR > 1
 #if VERSION_MAJOR > 1
     #warning "using develop SRS, please use release instead."
     #warning "using develop SRS, please use release instead."
     srs_warn("SRS %s is develop branch, please use %s instead", RTMP_SIG_SRS_VERSION, RTMP_SIG_SRS_RELEASE);
     srs_warn("SRS %s is develop branch, please use %s instead", RTMP_SIG_SRS_VERSION, RTMP_SIG_SRS_RELEASE);