diff --git a/trunk/auto/depends.sh b/trunk/auto/depends.sh
index f2d3e378c..8fd54333c 100755
--- a/trunk/auto/depends.sh
+++ b/trunk/auto/depends.sh
@@ -84,15 +84,6 @@ function Ubuntu_prepare()
         echo "The unzip is installed."
     fi
 
-    if [[ $SRS_NASM == YES ]]; then
-      nasm -v >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
-          echo "Installing nasm."
-          require_sudoer "sudo apt-get install -y --force-yes nasm"
-          sudo apt-get install -y --force-yes nasm; ret=$?; if [[ 0 -ne $ret ]]; then return $ret; fi
-          echo "The nasm is installed."
-      fi
-    fi
-
     if [[ $SRS_VALGRIND == YES ]]; then
         valgrind --help >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
             echo "Installing valgrind."
@@ -281,6 +272,10 @@ function OSX_prepare()
         echo "install unzip success"
     fi
 
+    pkg-config --version >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
+        echo "Please install pkg-config"; exit -1;
+    fi
+
     echo "OSX install tools success"
     return 0
 }
@@ -614,9 +609,16 @@ fi
 #####################################################################################
 if [[ $SRS_EXPORT_LIBRTMP_PROJECT == NO && $SRS_RTC == YES ]]; then
     FFMPEG_OPTIONS=""
+
+    # If disable nasm, disable all ASMs.
     if [[ $SRS_NASM == NO ]]; then
         FFMPEG_OPTIONS="--disable-asm --disable-x86asm --disable-inline-asm"
     fi
+    # If no nasm, we disable the x86asm.
+    nasm -v >/dev/null 2>&1; ret=$?; if [[ 0 -ne $ret ]]; then
+        FFMPEG_OPTIONS="--disable-x86asm"
+    fi
+
     if [[ -f ${SRS_OBJS}/${SRS_PLATFORM}/ffmpeg/lib/libavcodec.a ]]; then
         echo "The ffmpeg-4.2-fit is ok.";
     else
diff --git a/trunk/auto/options.sh b/trunk/auto/options.sh
index 69293fce3..f2b0cb7e6 100755
--- a/trunk/auto/options.sh
+++ b/trunk/auto/options.sh
@@ -569,6 +569,7 @@ function apply_user_detail_options() {
 
     # Detect whether has sendmmsg.
     # @see http://man7.org/linux/man-pages/man2/sendmmsg.2.html
+    mkdir -p ${SRS_OBJS} &&
     echo "#include <sys/socket.h>" > ${SRS_OBJS}/_tmp_sendmmsg_detect.c
     echo "int main(int argc, char** argv) {" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c
     echo "  struct mmsghdr hdr;" >> ${SRS_OBJS}/_tmp_sendmmsg_detect.c
diff --git a/trunk/src/app/srs_app_http_api.cpp b/trunk/src/app/srs_app_http_api.cpp
index 6a83f7a8c..fdfbf8747 100644
--- a/trunk/src/app/srs_app_http_api.cpp
+++ b/trunk/src/app/srs_app_http_api.cpp
@@ -1615,14 +1615,22 @@ srs_error_t SrsGoApiPerf::serve_http(ISrsHttpResponseWriter* w, ISrsHttpMessage*
     SrsStatistic* stat = SrsStatistic::instance();
 
     string target = r->query_get("target");
-    srs_trace("query target=%s", target.c_str());
+    string reset = r->query_get("reset");
+    srs_trace("query target=%s, reset=%s", target.c_str(), reset.c_str());
 
     if (true) {
         SrsJsonObject* p = SrsJsonAny::object();
         data->set("query", p);
 
         p->set("target", SrsJsonAny::str(target.c_str()));
+        p->set("reset", SrsJsonAny::str(reset.c_str()));
         p->set("help", SrsJsonAny::str("?target=avframes|rtc|rtp|gso|writev_iovs|sendmmsg"));
+        p->set("help2", SrsJsonAny::str("?reset=all"));
+    }
+
+    if (!reset.empty()) {
+        stat->reset_perf();
+        return srs_api_response(w, r, obj->dumps());
     }
 
     if (target.empty() || target == "avframes") {
diff --git a/trunk/src/app/srs_app_statistic.hpp b/trunk/src/app/srs_app_statistic.hpp
index 0d9905f75..c0344989f 100644
--- a/trunk/src/app/srs_app_statistic.hpp
+++ b/trunk/src/app/srs_app_statistic.hpp
@@ -262,6 +262,9 @@ public:
     virtual void perf_sendmmsg_on_packets(int nb_packets);
     // Dumps the perf statistic data for UDP sendmmsg, for performance analysis.
     virtual srs_error_t dumps_perf_sendmmsg(SrsJsonObject* obj);
+public:
+    // Reset all perf stat data.
+    virtual void reset_perf();
 private:
     virtual void perf_on_packets(SrsStatisticCategory* p, int nb_msgs);
     virtual srs_error_t dumps_perf(SrsStatisticCategory* p, SrsJsonObject* obj);