Added NODELAY option to both server and client

server/CMakeLists.txt

@@ -17,6 +17,9 @@ task.cpp
 mutex.h
 mutex.cpp
 
+log.h
+log.cpp
+
 SynchronousSocket.cpp
 SynchronousSocket.h
 )

server/SynchronousSocket.cpp

@@ -7,6 +7,8 @@
 #include <unistd.h>
 #include <errno.h>
 
+#include "log.h"
+
 SynchronousSocket::SynchronousSocket()
 {
 	socket = -1;
@@ -63,6 +65,7 @@ void SynchronousSocket::Send(const string & data)
 {
 	int pos = 0;
 	time_t start = time(NULL);
+	LogTime("Send() start");
 	while (pos < (int)data.length())
 	{
 		int res = send(socket, &((data.data())[pos]), data.length() - pos, 0);
@@ -87,17 +90,21 @@ void SynchronousSocket::Send(const string & data)
 			pos += res;
 		}
 	}
+	LogTime("Send() finish");
 }
 
 string SynchronousSocket::Receive(int amount)
 {
 	string r = "";
 	time_t start = time(NULL);
+	LogTime("Receive() start");
 	while ((int)r.length() < amount)
 	{
 		char buf[BUFFER_SIZE];
 		int to_recv = min((int)sizeof(buf), amount - (int)r.length());
+		LogTime("Receive(), before recv");
 		int res = recv(socket, buf, to_recv, 0);
+		LogTime("Receive(), after recv");
 		if (res == 0)
 		{
 			// бросаем специфический exception, означающий, что сокет закрыт
@@ -125,6 +132,7 @@ string SynchronousSocket::Receive(int amount)
 			r += string(buf, res);
 		}
 	}
+	LogTime("Receive() finish");
 	return r;
 }
 

server/log.cpp

@@ -0,0 +1,16 @@
+#include "log.h"
+#include <chrono>
+#include <iostream>
+
+using namespace std;
+
+void LogTime(const string &message)
+{
+	static auto start = chrono::high_resolution_clock::now();
+	static auto prev = start;
+	auto current = chrono::high_resolution_clock::now();
+	auto nsec = chrono::duration_cast<chrono::nanoseconds>(current - start).count();
+	auto nsec_prev = chrono::duration_cast<chrono::nanoseconds>(current - prev).count();
+	cerr << (nsec / 1000000.f) << " " << message << " delta " << (nsec_prev / 1000000.0f) << "\n";
+	prev = current;
+}

server/log.h

@@ -0,0 +1,8 @@
+#ifndef LOG_HEADER_FILE_INCLUDED
+#define LOG_HEADER_FILE_INCLUDED
+
+#include <string>
+
+void LogTime(const std::string &message);
+
+#endif

server/tcp_perf_test_server.cpp

@@ -1,4 +1,5 @@
 #include <netinet/in.h>
+#include <netinet/tcp.h>
 #include <arpa/inet.h>
 #include <string>
 #include <cstring>
@@ -96,6 +97,12 @@ void* IPSocketThread(void* arg)
 			cerr << "Error accepting connection, errno = " << errno << "\n";
 			continue;
 		}
+		int yes = 1;
+		int result = setsockopt(recsock, IPPROTO_TCP, TCP_NODELAY, (char*)&yes, sizeof(int));
+		if (result < 0)
+		{
+			cerr << "Error setting socket option, errno = " << errno << "\n";
+		}
 		cout << "Accepted connection from " << inet_ntoa(peeraddr.sin_addr) << ":" << ntohs(peeraddr.sin_port) << "\n";
 		CreateThread(&ProcessRequests, &recsock);
 	}