For #307, config sendmmsg max

trunk/conf/full.conf

@@ -403,6 +403,10 @@ rtc_server {
     # If not, use RSA certificate.
     # default: on
     ecdsa           on;
+    # The max UDP messages send by sendmmsg.
+    # @remark No effect if OS does not support sendmmsg, like OSX.
+    # default: 256
+    sendmmsg        256;
 }
 
 vhost rtc.vhost.srs.com {

trunk/src/app/srs_app_config.cpp

@@ -4656,6 +4656,27 @@ bool SrsConfig::get_rtc_server_ecdsa()
     return SRS_CONF_PERFER_TRUE(conf->arg0());
 }
 
+int SrsConfig::get_rtc_server_sendmmsg()
+{
+#if !defined(SRS_AUTO_HAS_SENDMMSG) || !defined(SRS_AUTO_SENDMMSG)
+    static int DEFAULT = 1;
+#else
+    static int DEFAULT = 256;
+#endif
+
+    SrsConfDirective* conf = root->get("rtc_server");
+    if (!conf) {
+        return DEFAULT;
+    }
+
+    conf = conf->get("sendmmsg");
+    if (!conf || conf->arg0().empty()) {
+        return DEFAULT;
+    }
+
+    return ::atoi(conf->arg0().c_str());
+}
+
 SrsConfDirective* SrsConfig::get_rtc(string vhost)
 {
     SrsConfDirective* conf = get_vhost(vhost);

trunk/src/app/srs_app_config.hpp

@@ -521,6 +521,7 @@ public:
     virtual int get_rtc_server_listen();
     virtual std::string get_rtc_server_candidates();
     virtual bool get_rtc_server_ecdsa();
+    virtual int get_rtc_server_sendmmsg();
 
     SrsConfDirective* get_rtc(std::string vhost);
     bool get_rtc_enabled(std::string vhost);

trunk/src/app/srs_app_http_api.cpp

@@ -1586,9 +1586,34 @@ srs_error_t SrsGoApiPerf::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage*
     obj->set("data", data);
 
     SrsStatistic* stat = SrsStatistic::instance();
-    if ((err = stat->dumps_perf_mw(data)) != srs_success) {
-        int code = srs_error_code(err); srs_error_reset(err);
-        return srs_api_response_code(w, r, code);
+
+    string target = r->query_get("target");
+    srs_trace("query target=%s", target.c_str());
+
+    if (true) {
+        SrsJsonObject* p = SrsJsonAny::object();
+        data->set("query", p);
+
+        p->set("target", SrsJsonAny::str(target.c_str()));
+        p->set("help", SrsJsonAny::str("?target=writev|sendmmsg"));
+    }
+
+    if (target.empty() || target == "writev") {
+        SrsJsonObject* p = SrsJsonAny::object();
+        data->set("writev", p);
+        if ((err = stat->dumps_perf_writev(p)) != srs_success) {
+            int code = srs_error_code(err); srs_error_reset(err);
+            return srs_api_response_code(w, r, code);
+        }
+    }
+
+    if (target.empty() || target == "sendmmsg") {
+        SrsJsonObject* p = SrsJsonAny::object();
+        data->set("sendmmsg", p);
+        if ((err = stat->dumps_perf_sendmmsg(p)) != srs_success) {
+            int code = srs_error_code(err); srs_error_reset(err);
+            return srs_api_response_code(w, r, code);
+        }
     }
 
     return srs_api_response(w, r, obj->dumps());

trunk/src/app/srs_app_rtc_conn.cpp

@@ -52,6 +52,7 @@ using namespace std;
 #include <srs_service_utility.hpp>
 #include <srs_http_stack.hpp>
 #include <srs_app_http_api.hpp>
+#include <srs_app_statistic.hpp>
 
 static bool is_stun(const uint8_t* data, const int size) 
 {
@@ -1342,6 +1343,11 @@ srs_error_t SrsRtcServer::cycle()
     // TODO: FIXME: Use pithy print.
     uint32_t cnt = 1;
 
+    SrsStatistic* stat = SrsStatistic::instance();
+
+    // TODO: FIXME: Support reload.
+    int max_sendmmsg = _srs_config->get_rtc_server_sendmmsg();
+
     while (true) {
         if ((err = trd->pull()) != srs_success) {
             return err;
@@ -1356,19 +1362,26 @@ srs_error_t SrsRtcServer::cycle()
         vector<mmsghdr> mhdrs = mmhdrs;
         mmhdrs.clear();
 
-        // TODO: FIXME: Use pithy print.
-        if ((cnt++ % 1000) == 0) {
-            srs_trace("SEND %d msgs by sendmmsg", mhdrs.size());
-        }
+        mmsghdr* p = &mhdrs[0];
+        for (mmsghdr* end = p + mhdrs.size(); p < end; p += max_sendmmsg) {
+            int vlen = (int)(end - p);
+            vlen = srs_min(max_sendmmsg, vlen);
 
-        if (!mhdrs.empty()) {
-            mmsghdr* msgvec = &mhdrs[0];
-            unsigned int vlen = (unsigned int)mhdrs.size();
-            int r0 = srs_sendmmsg(mmstfd, msgvec, vlen, 0, SRS_UTIME_NO_TIMEOUT);
-            if (r0 != (int)vlen) {
+            int r0 = srs_sendmmsg(mmstfd, p, (unsigned int)vlen, 0, SRS_UTIME_NO_TIMEOUT);
+            if (r0 != vlen) {
                 srs_warn("sendmsg %d msgs, %d done", vlen, r0);
             }
+
+            stat->perf_mw_on_packets(vlen);
         }
+
+        // TODO: FIXME: Use pithy print.
+        if ((cnt++ % 100) == 0) {
+            // TODO: FIXME: Support reload.
+            max_sendmmsg = _srs_config->get_rtc_server_sendmmsg();
+            srs_trace("-> RTC SEND %d msgs, by sendmmsg %d", mhdrs.size(), max_sendmmsg);
+        }
+
         for (int i = 0; i < (int)mhdrs.size(); i++) {
             msghdr* hdr = &mhdrs[i].msg_hdr;
             for (int i = 0; i < (int)hdr->msg_iovlen; i++) {

trunk/src/app/srs_app_statistic.cpp

@@ -266,6 +266,7 @@ SrsStatistic::SrsStatistic()
     perf_iovs = new SrsStatisticCategory();
     perf_msgs = new SrsStatisticCategory();
     perf_sys = new SrsStatisticCategory();
+    perf_sendmmsg = new SrsStatisticCategory();
 }
 
 SrsStatistic::~SrsStatistic()
@@ -303,6 +304,7 @@ SrsStatistic::~SrsStatistic()
     srs_freep(perf_iovs);
     srs_freep(perf_msgs);
     srs_freep(perf_sys);
+    srs_freep(perf_sendmmsg);
 }
 
 SrsStatistic* SrsStatistic::instance()
@@ -664,7 +666,7 @@ void SrsStatistic::perf_mw_on_packets(int nb_pkts, int bytes_pkts, int nb_iovs)
     perf_sys->b++;
 }
 
-srs_error_t SrsStatistic::dumps_perf_mw(SrsJsonObject* obj)
+srs_error_t SrsStatistic::dumps_perf_writev(SrsJsonObject* obj)
 {
     srs_error_t err = srs_success;
 
@@ -736,6 +738,76 @@ srs_error_t SrsStatistic::dumps_perf_mw(SrsJsonObject* obj)
     return err;
 }
 
+void SrsStatistic::perf_mw_on_packets(int nb_msgs)
+{
+    // For perf msgs, the nb_msgs stat.
+    //      a: =1
+    //      b: <10
+    //      c: <100
+    //      d: <200
+    //      e: <300
+    //      f: <400
+    //      g: <500
+    //      h: <600
+    //      i: <1000
+    //      j: >=1000
+    if (nb_msgs == 1) {
+        perf_sendmmsg->a++;
+    } else if (nb_msgs < 10) {
+        perf_sendmmsg->b++;
+    } else if (nb_msgs < 100) {
+        perf_sendmmsg->c++;
+    } else if (nb_msgs < 200) {
+        perf_sendmmsg->d++;
+    } else if (nb_msgs < 300) {
+        perf_sendmmsg->e++;
+    } else if (nb_msgs < 400) {
+        perf_sendmmsg->f++;
+    } else if (nb_msgs < 500) {
+        perf_sendmmsg->g++;
+    } else if (nb_msgs < 600) {
+        perf_sendmmsg->h++;
+    } else if (nb_msgs < 1000) {
+        perf_sendmmsg->i++;
+    } else {
+        perf_sendmmsg->j++;
+    }
+}
+
+srs_error_t SrsStatistic::dumps_perf_sendmmsg(SrsJsonObject* obj)
+{
+    srs_error_t err = srs_success;
+
+    if (true) {
+        SrsJsonObject* p = SrsJsonAny::object();
+        obj->set("msgs", p);
+
+        // For perf msgs, the nb_msgs stat.
+        //      a: =1
+        //      b: <10
+        //      c: <100
+        //      d: <200
+        //      e: <300
+        //      f: <400
+        //      g: <500
+        //      h: <600
+        //      i: <1000
+        //      j: >=1000
+        p->set("lt_2",      SrsJsonAny::integer(perf_sendmmsg->a));
+        p->set("lt_10",     SrsJsonAny::integer(perf_sendmmsg->b));
+        p->set("lt_100",    SrsJsonAny::integer(perf_sendmmsg->c));
+        p->set("lt_200",    SrsJsonAny::integer(perf_sendmmsg->d));
+        p->set("lt_300",    SrsJsonAny::integer(perf_sendmmsg->e));
+        p->set("lt_400",    SrsJsonAny::integer(perf_sendmmsg->f));
+        p->set("lt_500",    SrsJsonAny::integer(perf_sendmmsg->g));
+        p->set("lt_600",    SrsJsonAny::integer(perf_sendmmsg->h));
+        p->set("lt_1000",   SrsJsonAny::integer(perf_sendmmsg->i));
+        p->set("gt_1000",   SrsJsonAny::integer(perf_sendmmsg->j));
+    }
+
+    return err;
+}
+
 SrsStatisticVhost* SrsStatistic::create_vhost(SrsRequest* req)
 {
     SrsStatisticVhost* vhost = NULL;

trunk/src/app/srs_app_statistic.hpp

@@ -169,6 +169,7 @@ private:
     SrsStatisticCategory* perf_iovs;
     SrsStatisticCategory* perf_msgs;
     SrsStatisticCategory* perf_sys;
+    SrsStatisticCategory* perf_sendmmsg;
 private:
     SrsStatistic();
     virtual ~SrsStatistic();
@@ -233,8 +234,13 @@ public:
     // Stat for packets merged written, nb_pkts is the number of or chunk packets,
     // bytes_pkts is the total bytes of or chunk packets, nb_iovs is the total number of iovec.
     virtual void perf_mw_on_packets(int nb_pkts, int bytes_pkts, int nb_iovs);
-    // Dumps the perf statistic data, for performance analysis.
-    virtual srs_error_t dumps_perf_mw(SrsJsonObject* obj);
+    // Dumps the perf statistic data for TCP writev, for performance analysis.
+    virtual srs_error_t dumps_perf_writev(SrsJsonObject* obj);
+public:
+    // Stat for packets UDP sendmmsg, nb_msgs is the vlen for sendmmsg.
+    virtual void perf_mw_on_packets(int nb_msgs);
+    // Dumps the perf statistic data for UDP sendmmsg, for performance analysis.
+    virtual srs_error_t dumps_perf_sendmmsg(SrsJsonObject* obj);
 private:
     virtual SrsStatisticVhost* create_vhost(SrsRequest* req);
     virtual SrsStatisticStream* create_stream(SrsStatisticVhost* vhost, SrsRequest* req);

trunk/src/service/srs_service_st.cpp

@@ -428,6 +428,14 @@ int srs_sendmmsg(srs_netfd_t stfd, struct mmsghdr *msgvec, unsigned int vlen, in
     // further sendmmsg() call to send the remaining messages.
     return vlen;
 #else
+    if (vlen == 1) {
+        int r0 = srs_sendmsg(stfd, &msgvec->msg_hdr, flags, timeout);
+        if (r0 < 0) {
+            return r0;
+        }
+        msgvec->msg_len = r0;
+        return 1;
+    }
     return st_sendmmsg((st_netfd_t)stfd, msgvec, vlen, flags, (st_utime_t)timeout);
 #endif
 }