for bug #251, remove the mic(message iovs cache), no use.

@@ -822,10 +822,6 @@ SrsSource::SrsSource(SrsRequest* req)
     
     
     _srs_config->subscribe(this);
     _srs_config->subscribe(this);
     atc = _srs_config->get_atc(_req->vhost);
     atc = _srs_config->get_atc(_req->vhost);
-    
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    chunk_size = 0;
-#endif
 }
 }
 
 
 SrsSource::~SrsSource()
 SrsSource::~SrsSource()
@@ -1052,26 +1048,6 @@ int SrsSource::on_reload_vhost_dvr(string vhost)
     return ret;
     return ret;
 }
 }
 
 
-int SrsSource::on_reload_vhost_chunk_size(string vhost)
-{
-    int ret = ERROR_SUCCESS;
-    
-    if (_req->vhost != vhost) {
-        return ret;
-    }
-
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    int size = _srs_config->get_chunk_size(_req->vhost);
-    if (chunk_size != size) {
-        srs_warn("connected clients will error for mic chunk_size changed %d=>%d", 
-            chunk_size, size);
-    }
-    chunk_size = size;
-#endif
-    
-    return ret;
-}
-
 int SrsSource::on_reload_vhost_transcode(string vhost)
 int SrsSource::on_reload_vhost_transcode(string vhost)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
@@ -1301,14 +1277,6 @@ int SrsSource::on_meta_data(SrsCommonMessage* msg, SrsOnMetaDataPacket* metadata
     }
     }
     srs_verbose("initialize shared ptr metadata success.");
     srs_verbose("initialize shared ptr metadata success.");
     
     
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    if ((ret = cache_metadata->mic_evaluate(chunk_size)) != ERROR_SUCCESS) {
-        srs_error("mic metadata iovs failed, chunk_size=%d. ret=%d", chunk_size, ret);
-        return ret;
-    }
-    srs_info("mic metadata iovs ok, chunk_size=%d", chunk_size);
-#endif
-    
     // copy to all consumer
     // copy to all consumer
     if (true) {
     if (true) {
         std::vector<SrsConsumer*>::iterator it;
         std::vector<SrsConsumer*>::iterator it;
@@ -1350,14 +1318,6 @@ int SrsSource::on_audio(SrsCommonMessage* __audio)
     }
     }
     srs_verbose("initialize shared ptr audio success.");
     srs_verbose("initialize shared ptr audio success.");
     
     
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    if ((ret = msg.mic_evaluate(chunk_size)) != ERROR_SUCCESS) {
-        srs_error("mic audio iovs failed, chunk_size=%d. ret=%d", chunk_size, ret);
-        return ret;
-    }
-    srs_info("mic audio iovs ok, chunk_size=%d", chunk_size);
-#endif
-    
 #ifdef SRS_AUTO_HLS
 #ifdef SRS_AUTO_HLS
     if ((ret = hls->on_audio(&msg)) != ERROR_SUCCESS) {
     if ((ret = hls->on_audio(&msg)) != ERROR_SUCCESS) {
         srs_warn("hls process audio message failed, ignore and disable hls. ret=%d", ret);
         srs_warn("hls process audio message failed, ignore and disable hls. ret=%d", ret);
@@ -1468,14 +1428,6 @@ int SrsSource::on_video(SrsCommonMessage* __video)
     }
     }
     srs_verbose("initialize shared ptr video success.");
     srs_verbose("initialize shared ptr video success.");
     
     
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    if ((ret = msg.mic_evaluate(chunk_size)) != ERROR_SUCCESS) {
-        srs_error("mic video iovs failed, chunk_size=%d. ret=%d", chunk_size, ret);
-        return ret;
-    }
-    srs_info("mic video iovs ok, chunk_size=%d", chunk_size);
-#endif
-    
 #ifdef SRS_AUTO_HLS
 #ifdef SRS_AUTO_HLS
     if ((ret = hls->on_video(&msg)) != ERROR_SUCCESS) {
     if ((ret = hls->on_video(&msg)) != ERROR_SUCCESS) {
         srs_warn("hls process video message failed, ignore and disable hls. ret=%d", ret);
         srs_warn("hls process video message failed, ignore and disable hls. ret=%d", ret);
@@ -1727,11 +1679,6 @@ int SrsSource::on_publish()
         return ret;
         return ret;
     }
     }
 #endif
 #endif
-    
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    chunk_size = _srs_config->get_chunk_size(_req->vhost);
-    srs_trace("mic use chunk_size=%d to send msgs", chunk_size);
-#endif
 
 
     return ret;
     return ret;
 }
 }

@@ -403,11 +403,6 @@ private:
     std::vector<SrsForwarder*> forwarders;
     std::vector<SrsForwarder*> forwarders;
     // for aggregate message
     // for aggregate message
     SrsStream* aggregate_stream;
     SrsStream* aggregate_stream;
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    // the chunk size for mic,
-    // update when publish stream.
-    int chunk_size;
-#endif
 private:
 private:
     /**
     /**
     * the sample rate of audio in metadata.
     * the sample rate of audio in metadata.
@@ -452,7 +447,6 @@ public:
     virtual int on_reload_vhost_forward(std::string vhost);
     virtual int on_reload_vhost_forward(std::string vhost);
     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_chunk_size(std::string vhost);
     virtual int on_reload_vhost_transcode(std::string vhost);
     virtual int on_reload_vhost_transcode(std::string vhost);
 // for the tools callback
 // for the tools callback
 public:
 public:

@@ -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    67
+#define VERSION_REVISION    68
 // 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"

@@ -97,25 +97,12 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // the default config of mw.
 // the default config of mw.
 #define SRS_PERF_MW_SLEEP 350
 #define SRS_PERF_MW_SLEEP 350
 /**
 /**
-* use iovs cache in each msg,
-* for the shared ptr message, we calc once and used for every copy.
-* @see https://github.com/winlinvip/simple-rtmp-server/issues/251
-* @remark if enable this, donot use protocol iovs cache.
-* @remark when reload change the chunk size, previous clients error.
-*/
-#undef SRS_PERF_MW_MSG_IOVS_CACHE
-/**
 * how many msgs can be send entirely.
 * how many msgs can be send entirely.
 * for play clients to get msgs then totally send out.
 * for play clients to get msgs then totally send out.
 * for the mw sleep set to 1800, the msgs is about 133.
 * for the mw sleep set to 1800, the msgs is about 133.
 * @remark, recomment to 128.
 * @remark, recomment to 128.
-* @remark, when mic enabled, use larger iovs cache, to 512.
 */
 */
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
-    #define SRS_PERF_MW_MSGS 128
-#else
-    #define SRS_PERF_MW_MSGS 512
-#endif
+#define SRS_PERF_MW_MSGS 128
 
 
 /**
 /**
 * whether set the socket send buffer size.
 * whether set the socket send buffer size.

@@ -149,11 +149,6 @@ void show_macro_features()
 #endif
 #endif
     srs_trace("system default latency in ms: mw(0-%d) + mr(0-%d) + play-queue(0-%d)",
     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);
         SRS_PERF_MW_SLEEP, possible_mr_latency, SRS_PERF_PLAY_QUEUE*1000);
-        
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
-    srs_warn("MIC(message iovs cache) enabled, the connected clients will be"
-        "disconneted when reload changed the chunk_size.");
-#endif
 }
 }
 
 
 void check_macro_features()
 void check_macro_features()

@@ -387,109 +387,16 @@ SrsSharedPtrMessage::__SrsSharedPtr::__SrsSharedPtr()
     payload = NULL;
     payload = NULL;
     size = 0;
     size = 0;
     shared_count = 0;
     shared_count = 0;
-
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    nb_iovs = 0;
-    iovs = NULL;
-    chunk_size = 0;
-#endif
 }
 }
 
 
 SrsSharedPtrMessage::__SrsSharedPtr::~__SrsSharedPtr()
 SrsSharedPtrMessage::__SrsSharedPtr::~__SrsSharedPtr()
 {
 {
     srs_freep(payload);
     srs_freep(payload);
-
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    srs_freep(iovs);
-#endif
 }
 }
 
 
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-int SrsSharedPtrMessage::__SrsSharedPtr::mic_evaluate(int chunk_size) 
-{
-    int ret = ERROR_SUCCESS;
-    
-    // use the chunk size, shuold not be changed.
-    this->chunk_size = chunk_size;
-    
-    // c0 header
-    int nbh = srs_chunk_header_c0(
-            header.perfer_cid, 0, header.payload_length,
-            header.message_type, 0,
-            mic_c0, sizeof(mic_c0));
-    srs_assert(nbh > 0);;
-    // c3 header
-    mic_c3 = 0xC0 | (header.perfer_cid & 0x3F);
-    
-    // calc number of iovs
-    nb_chunks = header.payload_length / chunk_size;
-    if (header.payload_length % chunk_size) {
-        nb_chunks++;
-    }
-    nb_iovs = 1/*cid*/ + 1/*size*//*type*/+ 1/*chunk*/;
-    // left chunks, always cid+chunk.
-    if (nb_chunks > 0) {
-        nb_iovs += (nb_chunks - 1) * 2;
-    }
-    
-    // create iovs
-    srs_freep(iovs);
-    iovs = new iovec[nb_iovs];
-    
-    // for payload chunks.
-    char* p = payload;
-    char* end = p + size;
-    iovec* iov = iovs + 0;
-    while (p < end) {
-        // size of payload.
-        int payload_size = srs_min(chunk_size, end - p);
-        
-        // header, c0 or c3
-        if (p == payload) {
-            // c0, cid+size+type
-            // cid, 1B
-            iov[0].iov_base = mic_c0;
-            iov[0].iov_len = 1;
-            
-            // size(payload length), 3B
-            // type(message type), 1B
-            iov[1].iov_base = mic_c0 + 4;
-            iov[1].iov_len = 4;
-        
-            // chunk
-            iov[2].iov_base = p;
-            iov[2].iov_len = payload_size;
-            
-            // move to next iovs.
-            iov += 3;
-        } else {
-            // c3
-            iov[0].iov_base = &mic_c3;
-            iov[0].iov_len = 1;
-        
-            // chunk
-            iov[1].iov_base = p;
-            iov[1].iov_len = payload_size;
-            
-            // move to next iovs.
-            iov += 2;
-        }
-        
-        // to next chunk
-        p += payload_size;
-    }
-    
-    return ret;
-}
-#endif
-
 SrsSharedPtrMessage::SrsSharedPtrMessage()
 SrsSharedPtrMessage::SrsSharedPtrMessage()
 {
 {
     ptr = NULL;
     ptr = NULL;
-    
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    mic_etime_present = false;
-#endif
 }
 }
 
 
 SrsSharedPtrMessage::~SrsSharedPtrMessage()
 SrsSharedPtrMessage::~SrsSharedPtrMessage()
@@ -592,7 +499,6 @@ bool SrsSharedPtrMessage::is_video()
     return ptr->header.message_type == RTMP_MSG_VideoMessage;
     return ptr->header.message_type == RTMP_MSG_VideoMessage;
 }
 }
 
 
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
 int SrsSharedPtrMessage::chunk_header(char* cache, int nb_cache, bool c0)
 int SrsSharedPtrMessage::chunk_header(char* cache, int nb_cache, bool c0)
 {
 {
     if (c0) {
     if (c0) {
@@ -606,7 +512,6 @@ int SrsSharedPtrMessage::chunk_header(char* cache, int nb_cache, bool c0)
             cache, nb_cache);
             cache, nb_cache);
     }
     }
 }
 }
-#endif
 
 
 SrsSharedPtrMessage* SrsSharedPtrMessage::copy()
 SrsSharedPtrMessage* SrsSharedPtrMessage::copy()
 {
 {
@@ -625,155 +530,6 @@ SrsSharedPtrMessage* SrsSharedPtrMessage::copy()
     return copy;
     return copy;
 }
 }
 
 
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-int SrsSharedPtrMessage::mic_evaluate(int chunk_size)
-{
-    int ret = ERROR_SUCCESS;
-    
-    // when chunk size changed, error to disconnect the client..
-    if (ptr->chunk_size > 0 && chunk_size != ptr->chunk_size) {
-        ret = ERROR_RTMP_MIC_CHUNKSIZE_CHANGED;
-        srs_warn("mic chunk size changed %d=>%d, ret=%d", 
-            ptr->chunk_size, chunk_size, ret);
-        return ret;
-    }
-    
-    // calc the shared ptr iovs at the first time.
-    if (ptr->chunk_size <= 0) {
-        if ((ret = ptr->mic_evaluate(chunk_size)) != ERROR_SUCCESS) {
-            srs_warn("mic evaluate source iovs failed. ret=%d", ret);
-            return ret;
-        }
-    }
-    
-    return ret;
-}
-
-int SrsSharedPtrMessage::mic_iovs_dump(iovec* iovs, int max_nb_iovs) 
-{
-    // calc the private iovs
-    char* pp = NULL;
-    
-    // calc number of iovs.
-    int nb_iovs = 1/*time*/ + 1/*sid*/;
-    // insert etime before all chunks.
-    if (mic_etime_present) {
-        nb_iovs += ptr->nb_chunks;
-    }
-    
-    // not enough, return nagetive to try another loop.
-    if (max_nb_iovs < nb_iovs + ptr->nb_iovs) {
-        return -1;
-    }
-    
-    // timestamp for c0/c3
-    u_int32_t timestamp = (u_int32_t)this->timestamp;
-    mic_etime_present = timestamp >= RTMP_EXTENDED_TIMESTAMP;
-    
-    // chunk message header, 11 bytes
-    // timestamp, 3bytes, big-endian
-    char* p = mic_c0_time;
-    if (!mic_etime_present) {
-        pp = (char*)&timestamp;
-        *p++ = pp[2];
-        *p++ = pp[1];
-        *p++ = pp[0];
-    } else {
-        *p++ = 0xFF;
-        *p++ = 0xFF;
-        *p++ = 0xFF;
-    }
-        
-    // stream_id, 4bytes, little-endian
-    p = mic_c0_sid;
-    pp = (char*)&stream_id;
-    *p++ = pp[0];
-    *p++ = pp[1];
-    *p++ = pp[2];
-    *p++ = pp[3];
-    
-    // for c0
-    // chunk extended timestamp header, 0 or 4 bytes, big-endian
-    // 
-    // for c3:
-    // chunk extended timestamp header, 0 or 4 bytes, big-endian
-    // 6.1.3. Extended Timestamp
-    // This field is transmitted only when the normal time stamp in the
-    // chunk message header is set to 0x00ffffff. If normal time stamp is
-    // set to any value less than 0x00ffffff, this field MUST NOT be
-    // present. This field MUST NOT be present if the timestamp field is not
-    // present. Type 3 chunks MUST NOT have this field.
-    // adobe changed for Type3 chunk:
-    //        FMLE always sendout the extended-timestamp,
-    //        must send the extended-timestamp to FMS,
-    //        must send the extended-timestamp to flash-player.
-    // @see: ngx_rtmp_prepare_message
-    // @see: http://blog.csdn.net/win_lin/article/details/13363699
-    // TODO: FIXME: extract to outer.
-    p = mic_etime;
-    if (mic_etime_present) {
-        pp = (char*)&timestamp;
-        *p++ = pp[3];
-        *p++ = pp[2];
-        *p++ = pp[1];
-        *p++ = pp[0];
-    }
-    
-    // dumps all ovs
-    iovec* shared = ptr->iovs;
-    iovec* iov = iovs;
-    
-    // dump the c0 chunk
-    // cid
-    iov->iov_len = shared->iov_len;
-    iov->iov_base = shared->iov_base;
-    iov++; shared++;
-    // time, 3B
-    iov->iov_base = mic_c0_time;
-    iov->iov_len = 3;
-    iov++;
-    // size, type
-    iov->iov_len = shared->iov_len;
-    iov->iov_base = shared->iov_base;
-    iov++; shared++;
-    // sid, 4B
-    iov->iov_base = mic_c0_sid;
-    iov->iov_len = 4;
-    iov++;
-    // etime, 4B
-    if (mic_etime_present) {
-        // etime
-        iov->iov_base = mic_etime;
-        iov->iov_len = 4;
-        iov++;
-    }
-    // chunk
-    iov->iov_len = shared->iov_len;
-    iov->iov_base = shared->iov_base;
-    iov++; shared++;
-    
-    // dump left c3 chunks
-    for (int i = 1; i < ptr->nb_chunks; i++) {
-        // cid
-        iov->iov_len = shared->iov_len;
-        iov->iov_base = shared->iov_base;
-        iov++; shared++;
-        if (mic_etime_present) {
-            // etime
-            iov->iov_base = mic_etime;
-            iov->iov_len = 4;
-            iov++;
-        }
-        // chunk
-        iov->iov_len = shared->iov_len;
-        iov->iov_base = shared->iov_base;
-        iov++; shared++;
-    }
-    
-    return nb_iovs + ptr->nb_iovs;
-}
-#endif
-
 SrsProtocol::AckWindowSize::AckWindowSize()
 SrsProtocol::AckWindowSize::AckWindowSize()
 {
 {
     ack_window_size = 0;
     ack_window_size = 0;
@@ -793,10 +549,8 @@ SrsProtocol::SrsProtocol(ISrsProtocolReaderWriter* io)
     // each chunk consumers atleast 2 iovs
     // each chunk consumers atleast 2 iovs
     srs_assert(nb_out_iovs >= 2);
     srs_assert(nb_out_iovs >= 2);
     
     
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
     warned_c0c3_cache_dry = false;
     warned_c0c3_cache_dry = false;
     auto_response_when_recv = true;
     auto_response_when_recv = true;
-#endif
     
     
     cs_cache = NULL;
     cs_cache = NULL;
     if (SRS_PERF_CHUNK_STREAM_CACHE > 0) {
     if (SRS_PERF_CHUNK_STREAM_CACHE > 0) {
@@ -1004,7 +758,6 @@ int SrsProtocol::do_send_messages(SrsSharedPtrMessage** msgs, int nb_msgs)
 {
 {
     int ret = ERROR_SUCCESS;
     int ret = ERROR_SUCCESS;
     
     
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
     int iov_index = 0;
     int iov_index = 0;
     iovec* iov = out_iovs + iov_index;
     iovec* iov = out_iovs + iov_index;
     
     
@@ -1105,51 +858,6 @@ int SrsProtocol::do_send_messages(SrsSharedPtrMessage** msgs, int nb_msgs)
         nb_msgs, iov_index, SRS_PERF_MW_MSGS, nb_out_iovs);
         nb_msgs, iov_index, SRS_PERF_MW_MSGS, nb_out_iovs);
 
 
     return do_iovs_send(out_iovs, iov_index);
     return do_iovs_send(out_iovs, iov_index);
-#else
-    // send all iovs for all msgs.
-    int msg_sent = 0;
-    while (msg_sent < nb_msgs) {
-        int iov_index = 0;
-        for (int i = msg_sent; i < nb_msgs; i++) {
-            SrsSharedPtrMessage* msg = msgs[i];
-            
-            // evaluate the first
-            if (i == 0 && (ret = msg->mic_evaluate(out_chunk_size)) != ERROR_SUCCESS) {
-                return ret;
-            }
-            
-            // dump msg to iovec.
-            int ok_iovs = msg->mic_iovs_dump(
-                out_iovs + iov_index, nb_out_iovs - iov_index
-            );
-            // protocol iovs cache exceed.
-            if (ok_iovs <= 0) {
-                break;
-            }
-            
-            // ok, dump next.
-            msg_sent++;
-            iov_index += ok_iovs;
-        }
-        srs_info("mic nb_iovs=%d, msgs=%d, msg_sent=%d, iovs_sent=%d", 
-            nb_out_iovs, nb_msgs, msg_sent, iov_index);
-        
-        // cache not enough.
-        if (iov_index <= 0) {
-            ret = ERROR_RTMP_MIC_CACHE_OVERFLOW;
-            srs_warn("mic iovs overflow, nb_iovs=%d, msgs=%d, msg_sent=%d, iovs_sent=%d, ret=%d",
-                nb_out_iovs, nb_msgs, msg_sent, iov_index, ret);
-            return ret;
-        }
-        
-        // send out these iovs.
-        if ((ret = do_iovs_send(out_iovs, iov_index)) != ERROR_SUCCESS) {
-            return ret;
-        }
-    }
-    
-    return ret;
-#endif
 }
 }
 
 
 int SrsProtocol::do_iovs_send(iovec* iovs, int size)
 int SrsProtocol::do_iovs_send(iovec* iovs, int size)

@@ -265,72 +265,10 @@ private:
         // the reference count
         // the reference count
         int shared_count;
         int shared_count;
     public:
     public:
-        // the iovs cache in shared ptr message.
-        // @see https://github.com/winlinvip/simple-rtmp-server/issues/251
-    #ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-        /**
-        * the mic(msg iovs cache).
-        * why share the cache in msg?
-        * all msgs of a source are same for:
-        *      1. cid, all use the same cid, copy from src msg.
-        *      2. size, all msg size never changed.
-        *      3. type, type never changed.
-        *      4. chunk size, all connections in a vhost use the same chunk size.
-        * the different:
-        *      1. time and etime, almost different.
-        *      2. stream id, maybe different, but almost the same.
-        * @remark, when reload change the chunk size, clients will be disconnected.
-        */
-        // the c0 shared section for all msgs
-        //      1. cid, 1B, same.
-        //      2. [*]time, 3B, not same.
-        //      3. size, 3B, same.
-        //      4. type, 1B, same.
-        //      5. [*]stream id, 4B, not same, little-endian.
-        //      6. [*]etime, 4B, not same.
-        // the stared field must be calced in each msg.
-        char mic_c0[16];
-        // the c3 headers.
-        char mic_c3;
-        // the calced iovs for all msg,
-        // we assumpt that the chunk size is not changed for a vhost,
-        // if do changed, the client will got an error msg and disconnect.
-        iovec* iovs;
-        int nb_iovs;
-        // the msgs source chunk size,
-        // which is evaluated the iovs first time,
-        // this cannot be changed.
-        int chunk_size;
-        // the number of chunks.
-        int nb_chunks;
-    #endif
-    public:
         __SrsSharedPtr();
         __SrsSharedPtr();
         virtual ~__SrsSharedPtr();
         virtual ~__SrsSharedPtr();
-    public:
-    #ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-        /**
-        * for iovs msg cache, calc the iovs.
-        * @param chunk_size use the specified chunk size to evaluate the iovs.
-        */
-        virtual int mic_evaluate(int chunk_size);
-    #endif
     };
     };
     __SrsSharedPtr* ptr;
     __SrsSharedPtr* ptr;
-private:
-    // msgs level cache.
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    // the c0 private section for this
-    //      1. time, 3B, not same, not used.
-    //      2. stream id, 4B, almost the same, little-endian.
-    //      3. etime, 4B, optional, always same for all chunk when present.
-    // the stared field must be calced in each msg.
-    char mic_c0_time[3];
-    char mic_c0_sid[4];
-    char mic_etime[4];
-    // whether etime present.
-    bool mic_etime_present;
-#endif
 public:
 public:
     SrsSharedPtrMessage();
     SrsSharedPtrMessage();
     virtual ~SrsSharedPtrMessage();
     virtual ~SrsSharedPtrMessage();
@@ -366,32 +304,17 @@ public:
     virtual bool is_audio();
     virtual bool is_audio();
     virtual bool is_video();
     virtual bool is_video();
 public:
 public:
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
     /**
     /**
     * generate the chunk header to cache.
     * generate the chunk header to cache.
     * @return the size of header.
     * @return the size of header.
     */
     */
     virtual int chunk_header(char* cache, int nb_cache, bool c0);
     virtual int chunk_header(char* cache, int nb_cache, bool c0);
-#endif
 public:
 public:
     /**
     /**
     * copy current shared ptr message, use ref-count.
     * copy current shared ptr message, use ref-count.
     * @remark, assert object is created.
     * @remark, assert object is created.
     */
     */
     virtual SrsSharedPtrMessage* copy();
     virtual SrsSharedPtrMessage* copy();
-public:
-#ifdef SRS_PERF_MW_MSG_IOVS_CACHE
-    /**
-    * for iovs msg cache, calc the iovs.
-    * @param chunk_size use the specified chunk size to evaluate the iovs.
-    */
-    virtual int mic_evaluate(int chunk_size);
-    /**
-    * dump all iovs, the _nb_iovs must equals to mic_iovs_count().
-    * @return the dumped count. -1 if not enough iovs.
-    */
-    virtual int mic_iovs_dump(iovec* iovs, int max_nb_iovs);
-#endif
 };
 };
 
 
 /**
 /**
@@ -465,9 +388,6 @@ private:
     */
     */
     iovec* out_iovs;
     iovec* out_iovs;
     int nb_out_iovs;
     int nb_out_iovs;
-    // if use iovs cache in each msg,
-    // donot use protocol level c0c3 cache.
-#ifndef SRS_PERF_MW_MSG_IOVS_CACHE
     /**
     /**
     * output header cache.
     * output header cache.
     * used for type0, 11bytes(or 15bytes with extended timestamp) header.
     * used for type0, 11bytes(or 15bytes with extended timestamp) header.
@@ -479,7 +399,6 @@ private:
     char out_c0c3_caches[SRS_CONSTS_C0C3_HEADERS_MAX];
     char out_c0c3_caches[SRS_CONSTS_C0C3_HEADERS_MAX];
     // whether warned user to increase the c0c3 header cache.
     // whether warned user to increase the c0c3 header cache.
     bool warned_c0c3_cache_dry;
     bool warned_c0c3_cache_dry;
-#endif
     /**
     /**
     * output chunk size, default to 128, set by config.
     * output chunk size, default to 128, set by config.
     */
     */