diff --git a/src/containers/piqueue.h b/src/containers/piqueue.h
index cf6cc2e2..bca83ad6 100755
--- a/src/containers/piqueue.h
+++ b/src/containers/piqueue.h
@@ -25,17 +25,17 @@
 #ifndef PIQUEUE_H
 #define PIQUEUE_H
 
-#include "pivector.h"
+#include "pideque.h"
 
 template<typename T>
-class PIP_EXPORT PIQueue: public PIVector<T> {
+class PIP_EXPORT PIQueue: public PIDeque<T> {
 public:
 	PIQueue() {;}
-	PIVector<T> & enqueue(const T & v) {PIVector<T>::push_front(v); return *this;}
-	T dequeue() {return PIVector<T>::take_back();}
-	T & head() {return PIVector<T>::back();}
-	const T & head() const {return PIVector<T>::back();}
-	PIVector<T> toVector() {PIVector<T> v(PIVector<T>::size()); for (uint i = 0; i < PIVector<T>::size(); ++i) v[i] = PIVector<T>::at(i); return v;}
+	PIDeque<T> & enqueue(const T & v) {PIDeque<T>::push_front(v); return *this;}
+	T dequeue() {return PIDeque<T>::take_back();}
+	T & head() {return PIDeque<T>::back();}
+	const T & head() const {return PIDeque<T>::back();}
+	PIVector<T> toVector() {PIVector<T> v(PIDeque<T>::size()); for (uint i = 0; i < PIDeque<T>::size(); ++i) v[i] = PIDeque<T>::at(i); return v;}
 };
 
 #endif // PIQUEUE_H
diff --git a/src/io/pibasetransfer.cpp b/src/io/pibasetransfer.cpp
index 5bb2bcf9..9de29b98 100644
--- a/src/io/pibasetransfer.cpp
+++ b/src/io/pibasetransfer.cpp
@@ -10,12 +10,12 @@ PIBaseTransfer::PIBaseTransfer(): crc(standardCRC_16()), diag(false) {
 	is_sending = is_receiving = is_pause = false;
 	break_ = true;
 	bytes_all = bytes_cur = 0;
-	replies_cnt = send_queue = 0;
+	send_queue = 0;
 	timeout_ = 10.;
 	diag.setDisconnectTimeout(timeout_);
 	//CONNECTU(&diag, qualityChanged, this, diagChanged);
-	diag.start(100);
-	packets_count = 32;
+	diag.start(50);
+	packets_count = 100;
 	setPacketSize(4096);
 	randomize();
 }
@@ -63,12 +63,14 @@ void PIBaseTransfer::received(PIByteArray data) {
 		diag.received(data.size(), false);
 		return;
 	} else diag.received(data.size(), true);
-	//piCoutObj << "receive" << h.session_id << h.type << h.id;
+//	piCoutObj << "receive" << h.session_id << h.type << h.id;
 	switch (pt) {
 		case pt_Unknown: break;
 		case pt_Data:
+			mutex_header.lock();
 			if (h.session_id != header.session_id || !is_receiving) {
 				sendBreak(h.session_id);
+				mutex_header.unlock();
 				return;
 			} else {
 				uint rcrc = h.crc;
@@ -76,32 +78,47 @@ void PIBaseTransfer::received(PIByteArray data) {
 				if (rcrc != ccrc) {
 					header.id = h.id;
 					sendReply(pt_ReplyInvalid);
-					//piCoutObj << "invalid CRC";
+					piCoutObj << "invalid CRC";
 				} else {
+					mutex_session.lock();
 					processData(h.id, data);
+					mutex_session.unlock();
 				}
 				if (is_pause) sendReply(pt_Pause);
 			}
+			mutex_header.unlock();
 		break;
 		case pt_ReplySuccess:
 		case pt_ReplyInvalid:
-			if (h.session_id != header.session_id) return;
+			mutex_header.lock();
+			if (h.session_id != header.session_id) {
+				mutex_header.unlock();
+				return;
+			}
 			if (is_pause) sendReply(pt_Pause);
+			mutex_header.unlock();
 			if (pt == pt_ReplySuccess) {
+				mutex_send.lock();
 				send_queue--;
 				if (send_queue < 0) send_queue = 0;
 				send_tm.reset();
+				mutex_send.unlock();
 			}
-			replies_cnt++;
 			if (is_sending) {
+				mutex_session.lock();
 				if (h.id < replies.size())
 					replies[h.id] = pt;
+				mutex_session.unlock();
+//				piCoutObj << "Done Packet" << h.id;
 			}
 			if (is_receiving && h.id == 0) {
 //				if (checkSession() == 0 && pt == pt_ReplySuccess) finish_receive(true);
-				if (checkSession() == 0 && pt == pt_ReplySuccess) {
+				if (pt == pt_ReplySuccess) {
+					mutex_session.lock();
+					int cs = checkSession();
+					mutex_session.unlock();
 					//piCoutObj << "Success receive";
-					finish_receive(true);
+					if (cs == 0) finish_receive(true);
 				}
 			}
 		break;
@@ -118,15 +135,18 @@ void PIBaseTransfer::received(PIByteArray data) {
 			}
 		break;
 		case pt_Start:
+			mutex_header.lock();
 			if (is_pause && (is_sending || is_receiving)) {
 				if (header.session_id == h.session_id) {
 					is_pause = false;
+					mutex_header.unlock();
 					resumed();
 					return;
 				}
 			}
 			if (is_sending && header.session_id != h.session_id) {
 				sendBreak(h.session_id);
+				mutex_header.unlock();
 				return;
 			}
 			if (is_receiving) {
@@ -134,12 +154,19 @@ void PIBaseTransfer::received(PIByteArray data) {
 					//sendBreak(h.session_id);
 					//return;
 					//piCoutObj << "restart receive";
+					mutex_header.unlock();
 					finish_receive(false, true);
-				} else return;
+				} else {
+					mutex_header.unlock();
+					return;
+				}
 			}
+			mutex_header.unlock();
 			if (data.size() == sizeof(StartRequest)) {
 				StartRequest sr;
 				data >> sr;
+				mutex_session.lock();
+				mutex_header.lock();
 				bytes_cur = 0;
 				state_string = "start request";
 				bytes_all = sr.size;
@@ -155,19 +182,25 @@ void PIBaseTransfer::received(PIByteArray data) {
 				//piCoutObj << "receiveStarted()";
 				is_receiving = true;
 				break_ = false;
+				mutex_send.lock();
+				send_queue = 0;
+				mutex_send.unlock();
 				receiveStarted();
-				replies_cnt = send_queue = 0;
 				state_string = "receiving";
 				replies[0] = pt_ReplySuccess;
+				mutex_session.unlock();
 				sendReply(pt_ReplySuccess);
+				mutex_header.unlock();
 			}
 		break;
 		case pt_Pause:
+			mutex_header.lock();
 			if (header.session_id == h.session_id) {
 				//piCout << "receive pause";
 				if (!is_pause && pause_tm.elapsed_s() < timeout_/10) {
 					//piCout << "resume";
 					sendReply(pt_Start);
+					mutex_header.unlock();
 					return;
 				}
 				if (!is_pause) paused();
@@ -179,6 +212,7 @@ void PIBaseTransfer::received(PIByteArray data) {
 				if (is_sending) send_tm.reset();
 				pause_tm.reset();
 			}
+			mutex_header.unlock();
 			break;
 		default: break;
 	}
@@ -186,48 +220,73 @@ void PIBaseTransfer::received(PIByteArray data) {
 
 
 bool PIBaseTransfer::send_process() {
+	mutex_session.lock();
 	packet_header_size = sizeof(PacketHeader) + customHeader().size();
 	break_ = false;
 	diag.reset();
 //	diag.start(100);
 	sendStarted();
 	is_sending = true;
-	replies.resize(session.size() + 1);
+	int session_size = session.size();
+	replies.resize(session_size + 1);
 	replies.fill(pt_Unknown);
+	mutex_session.unlock();
 	PIByteArray ba;
 	if (!getStartRequest()) return finish_send(false);
-	replies_cnt = send_queue = 0;
 	state_string = "sending";
 	PITimeMeasurer stm;
+	mutex_send.lock();
+	send_queue = 0;
 	send_tm.reset();
+	mutex_send.unlock();
 	//int ltm = 0;
-	for (int i = 0; i < session.size_s(); i++) {
-		if (send_queue >= packets_count || is_pause) {
+	for (int i = 0; i < session_size; i++) {
+		mutex_send.lock();
+		int sq = send_queue;
+		mutex_send.unlock();
+		if (sq >= packets_count || is_pause) {
 			--i;
-			piMSleep(1);
+			//piMSleep(1);
 			if (is_pause) {
 				piMSleep(40);
 				//piCout << "send pause";
+				mutex_header.lock();
 				sendReply(pt_Pause);
+				mutex_header.unlock();
 				if (pause_tm.elapsed_s() > timeout())return finish_send(false);
 			}
-			if (send_tm.elapsed_s() > timeout_) return finish_send(false);
-			if (stm.elapsed_s() > timeout_ / 10.)
+			mutex_send.lock();
+			if (send_tm.elapsed_s() > timeout_) {
+				mutex_send.unlock();
+				return finish_send(false);
+			}
+			if (stm.elapsed_s() > timeout_ / 10.) {
 				send_queue = 0;
+			}
+			mutex_send.unlock();
 			continue;
 		}
 		stm.reset();
 		ba = build_packet(i);
 		diag.sended(ba.size());
 		sendRequest(ba);
+		mutex_send.lock();
 		send_queue++;
+		mutex_send.unlock();
 		if (break_) return finish_send(false);
 	}
-	PITimeMeasurer tm2, tm;
+//	piCoutObj << "send done, checking";
+	PITimeMeasurer tm;
 	int prev_chk = 0;
+	mutex_send.lock();
 	send_queue = 0;
+	mutex_send.unlock();
+	piMSleep(10);
 	while (tm.elapsed_s() < timeout_) {
+		//piCoutObj << "recovering...";
+		mutex_session.lock();
 		int chk = checkSession();
+		mutex_session.unlock();
 		if (chk == 0) return finish_send(true);
 		if (chk != prev_chk) tm.reset();
 		else if (tm.elapsed_m() < 100) {
@@ -237,27 +296,32 @@ bool PIBaseTransfer::send_process() {
 		if (is_pause) {
 			piMSleep(40);
 			//piCout << "send pause";
+			mutex_header.lock();
 			sendReply(pt_Pause);
+			mutex_header.unlock();
 			if (pause_tm.elapsed_s() > timeout())return finish_send(false);
 			else continue;
 		}
 		prev_chk = chk;
 		if (chk > 0) {
-			if (tm2.elapsed_s() > timeout_ / 10.) {
-				//piCoutObj << "recovery packet" << chk;
-				if (send_queue >= packets_count) {
-					piMSleep(10);
-					continue;
-				}
-				ba = build_packet(chk - 1);
-				diag.sended(ba.size());
-				sendRequest(ba);
-				send_queue++;
+			//piCoutObj << "recovery packet" << chk;
+			mutex_send.lock();
+			int sq = send_queue;
+			mutex_send.unlock();
+			if (sq >= packets_count) {
+				piMSleep(10);
+				continue;
 			}
+			ba = build_packet(chk - 1);
+			diag.sended(ba.size());
+			sendRequest(ba);
+			mutex_send.lock();
+			send_queue++;
+			mutex_send.unlock();
 		}
 		//		if (chk == -1) return finish_send(false);
 		if (break_) return finish_send(false);
-		piMSleep(1);
+		//piMSleep(1);
 	}
 	return finish_send(false);
 }
@@ -281,6 +345,8 @@ int PIBaseTransfer::checkSession() {
 
 
 void PIBaseTransfer::buildSession(PIVector<Part> parts) {
+	mutex_session.lock();
+	mutex_header.lock();
 	state_string = "calculating parts ... ";
 	session.clear();
 	header.session_id = rand();
@@ -334,6 +400,8 @@ void PIBaseTransfer::buildSession(PIVector<Part> parts) {
 		}
 	}
 	if (cur_size > min_size) session << lfi;
+	mutex_header.unlock();
+	mutex_session.unlock();
 }
 
 
@@ -358,6 +426,7 @@ void PIBaseTransfer::sendReply(PacketType reply) {
 
 bool PIBaseTransfer::getStartRequest() {
 	PITimeMeasurer tm;
+	mutex_header.lock();
 	header.type = pt_Start;
 	header.id = 0;
 	PIByteArray ba;
@@ -365,6 +434,7 @@ bool PIBaseTransfer::getStartRequest() {
 	st.packets = (uint)session.size();
 	st.size = bytes_all;
 	ba << header;
+	mutex_header.unlock();
 	ba << st;
 	state_string = "send request";
 	while (tm.elapsed_s() < timeout_) {
@@ -372,24 +442,29 @@ bool PIBaseTransfer::getStartRequest() {
 		sendRequest(ba);
 		if (break_) return false;
 //		piCoutObj << replies[0];
+		mutex_session.lock();
 		if (replies[0] == pt_ReplySuccess) {
 			state_string = "send permited!";
+			piCoutObj << "ping " << tm.elapsed_m();
+			mutex_session.unlock();
 			return true;
 		}
-		piMSleep(100);
+		mutex_session.unlock();
+		piMSleep(1);
 	}
 	return false;
 }
 
 
 void PIBaseTransfer::processData(int id, PIByteArray & data) {
-	//piCoutObj << "received packet" << id << ", size" << data.size();
+//	piCoutObj << "received packet" << id << ", size" << data.size();
 	if (id < 1 || id > replies.size_s()) return;
 	if (!session[id - 1].isEmpty()) {
 		header.id = id;
 		replies[id] = pt_ReplySuccess;
 		sendReply(pt_ReplySuccess);
-		if (checkSession() == 0) state_string = "receive ok";
+		if (replies[replies.size()-1] == pt_ReplySuccess)
+			if (checkSession() == 0) state_string = "receive ok";
 		return;
 	}
 	Part fi;
@@ -413,19 +488,18 @@ void PIBaseTransfer::processData(int id, PIByteArray & data) {
 	}
 	header.id = id;
 	replies[id] = pt_ReplySuccess;
-	if (checkSession() == 0) state_string = "receive ok";
 	sendReply(pt_ReplySuccess);
+	if (checkSession() == 0) state_string = "receive ok";
 }
 
 
 PIByteArray PIBaseTransfer::build_packet(int id) {
 	PIByteArray ret;
 	PIByteArray ba;
-	header.id = id + 1;
-	header.type = pt_Data;
 	//piCoutObj << "session id" << header.session_id;
 	//ret << header;
 	ret.append(customHeader());
+	mutex_session.lock();
 	for (int i = 0; i < session[id].size_s(); i++) {
 		Part fi = session[id][i];
 		ret << fi;
@@ -435,10 +509,16 @@ PIByteArray PIBaseTransfer::build_packet(int id) {
 		if (ba.size() != fi.size) piCoutObj << "***error while build packet, wrong part size";
 		ret << ba;
 	}
+	mutex_session.unlock();
+	PIByteArray hdr;
+	mutex_header.lock();
+	header.id = id + 1;
+	header.type = pt_Data;
 	header.crc = crc.calculate(ret);
-	PIByteArray hdr; hdr << header;
+	hdr << header;
+	mutex_header.unlock();
 	ret.insert(0, hdr);
-	//piCoutObj << "Packet" << header.id << ret.size();
+//	piCoutObj << "Send Packet" << header.id << ret.size();
 	return ret;
 }
 
@@ -448,9 +528,11 @@ bool PIBaseTransfer::finish_send(bool ok) {
 	if (ok) state_string = "send done";
 	else state_string = "send failed";
 	//piCoutObj << state_string << PIString::readableSize(bytes_all);
+	mutex_header.lock();
 	header.id = 0;
 	if (!ok) sendBreak(header.session_id);
 	else sendReply(pt_ReplySuccess);
+	mutex_header.unlock();
 	sendFinished(ok);
 //	diag.stop();
 	bytes_all = bytes_cur = 0;
@@ -463,24 +545,13 @@ void PIBaseTransfer::finish_receive(bool ok, bool quet) {
 	if (ok) state_string = "receive done";
 	else state_string = "receive failed";
 	//piCoutObj << state_string << PIString::readableSize(bytes_all);
-	if (!ok && !quet) sendBreak(header.session_id);
+	if (!ok && !quet) {
+		mutex_header.lock();
+		sendBreak(header.session_id);
+		mutex_header.unlock();
+	}
 	receiveFinished(ok);
 //	diag.stop();
 	bytes_all = bytes_cur = 0;
 }
 
-
-void PIBaseTransfer::diagChanged(PIDiagnostics::Quality new_quality, PIDiagnostics::Quality old_quality) {
-	if (is_receiving) {
-		if (new_quality == PIDiagnostics::Failure) {
-			//piCout << "disconnected!";
-			break_ = true;
-			is_receiving = false;
-			state_string = "receive failed";
-			receiveFinished(false);
-			bytes_all = bytes_cur = 0;
-			//stopReceive();
-		}
-	}
-}
-
diff --git a/src/io/pibasetransfer.h b/src/io/pibasetransfer.h
index 6797c0c4..3208d768 100644
--- a/src/io/pibasetransfer.h
+++ b/src/io/pibasetransfer.h
@@ -121,8 +121,11 @@ private:
 	PITimeMeasurer send_tm, pause_tm;
 	PacketHeader header;
 	CRC_16 crc;
-	int replies_cnt, send_queue;
+	int send_queue;
 	PIDiagnostics diag;
+	PIMutex mutex_session;
+	PIMutex mutex_send;
+	PIMutex mutex_header;
 
 	void processData(int id, PIByteArray &data);
 	PIByteArray build_packet(int id);
@@ -132,7 +135,6 @@ private:
 	bool getStartRequest();
 	bool finish_send(bool ok);
 	void finish_receive(bool ok, bool quet = false);
-	EVENT_HANDLER2(void, diagChanged, PIDiagnostics::Quality, new_quality, PIDiagnostics::Quality, old_quality);
 };
 
 inline PIByteArray & operator <<(PIByteArray & s, const PIBaseTransfer::PacketHeader & v) {s << v.sig << v.type << v.session_id << v.id << v.crc; return s;}
diff --git a/src/io/pidiagnostics.cpp b/src/io/pidiagnostics.cpp
index e91c892a..e56eb65e 100755
--- a/src/io/pidiagnostics.cpp
+++ b/src/io/pidiagnostics.cpp
@@ -39,87 +39,77 @@
 
 PIDiagnostics::PIDiagnostics(bool start_): PITimer(PITimer::Pool) {
 	reset();
-	if (start_) start();
+	if (start_) start(100);
 }
 
 
 void PIDiagnostics::reset() {
-	setDisconnectTimeout(3.);
 	lock();
 	qual = PIDiagnostics::Unknown;
-	speedIn = speedOut = PIString::readableSize(0) + "/s";
-	ifreq = immediate_freq = integral_freq = 0.f;
-	cur_pckt = rec_once = 0;
-	wrong_count = receive_count = send_count = wrong_bytes = receive_bytes = send_bytes = 0;
-	packets_in_sec = packets_out_sec = bytes_in_sec = bytes_out_sec = 0;
+	speedRecv = speedSend = PIString::readableSize(0) + "/s";
+	immediate_freq = integral_freq = 0.f;
+	count_wrong = count_recv = count_send = bytes_wrong = bytes_recv = bytes_send = 0;
+	packets_recv_sec = packets_send_sec = bytes_recv_sec = bytes_send_sec = 0;
+	history_rec.clear();
+	history_send.clear();
+	history_rec << Entry();
+	history_send << Entry();
 	unlock();
+	setDisconnectTimeout(3.);
 }
 
 
 void PIDiagnostics::received(int size, bool correct) {
 	lock();
-	rec_once = 1;
+	Entry &e(history_send.back());
 	if (correct) {
-		float el = tm.elapsed_s();
-		tm.reset();
-		if (el > 0.f) immediate_freq = ifreq = 1.f / el;
-		else immediate_freq = ifreq = 0.f;
-		receive_count++;
-		receive_bytes += size;
+		e.cnt_ok++;
+		e.bytes_ok += size;
+		count_recv++;
+		bytes_recv += size;
 	} else {
-		immediate_freq = ifreq = 0.f;
-		wrong_count++;
-		wrong_bytes += size;
+		e.cnt_fail++;
+		e.bytes_fail += size;
+		count_wrong++;
+		bytes_wrong += size;
 	}
-	addToHistory(history_rec, size, correct);
+	e.empty = false;
 	unlock();
 }
 
 
 void PIDiagnostics::sended(int size) {
 	lock();
-	send_count++;
-	send_bytes += size;
-	addToHistory(history_send, size);
+	Entry &e(history_send.back());
+	e.cnt_ok++;
+	e.bytes_ok += size;
+	count_send++;
+	bytes_send += size;
+	e.empty = false;
 	unlock();
 }
 
 
 void PIDiagnostics::tick(void * data, int delimiter) {
 	lock();
-	checkHistory(history_rec);
-	checkHistory(history_send);
-	PIDiagnostics::Quality diag;
-	immediate_freq = ifreq;
-	ifreq = 0.f;
-	int bps[2];
-	int cpckt[2];
-	bps[0] = bps[1] = 0;
-	cpckt[0] = cpckt[1] = 0;
-	packets_in_sec = packets_out_sec = 0;
-	piForeachC (Entry & e, history_rec) {
-		if (e.ok) {
-			bps[0] += e.bytes;
-			packets_in_sec++;
-		}
-		cpckt[e.ok ? 1 : 0]++;
-	}
-	piForeachC (Entry & e, history_send) {
-		bps[1] += e.bytes;
-		packets_out_sec++;
-	}
-	bytes_in_sec = bps[0] / disconn_;
-	bytes_out_sec = bps[1] / disconn_;
-	packets_in_sec /= disconn_;
-	packets_out_sec /= disconn_;
-	speedIn = PIString::readableSize(bytes_in_sec) + "/s";
-	speedOut = PIString::readableSize(bytes_out_sec) + "/s";
-	int arc = cpckt[0] + cpckt[1];
+	int tcnt = 0;
+	Entry send = calcHistory(history_send, &tcnt);
+	Entry recv = calcHistory(history_rec, &tcnt);
+	float it = disconn_ * (float(tcnt) / history_rec.size());
+	float hz = interval() / 1000.f;
+	integral_freq = recv.cnt_ok / it;
+	packets_recv_sec = ullong(float(recv.cnt_ok) / it);
+	packets_send_sec = ullong(float(send.cnt_ok) / it);
+	bytes_recv_sec = ullong(double(recv.bytes_ok) / it);
+	bytes_send_sec = ullong(double(send.bytes_ok) / it);
+	immediate_freq = double(history_rec.back().cnt_ok) / hz;
+	speedRecv = PIString::readableSize(ullong(double(history_rec.back().bytes_ok) / hz)) + "/s";
+	speedSend = PIString::readableSize(ullong(double(history_send.back().bytes_ok) / hz)) + "/s";
+	int arc = recv.cnt_ok + recv.cnt_fail;
 	float good_percents = 0.f;
-	if (arc > 0) good_percents = (float)cpckt[1] / arc * 100.f;
-	if (disconn_ > 0.) integral_freq = cpckt[1] / disconn_;
-	else integral_freq = 0.;
-	if (rec_once == 0) {
+	if (arc > 0) good_percents = (float)recv.cnt_ok / arc * 100.f;
+	PIDiagnostics::Quality diag;
+	if (tcnt == 0) {
 		diag = PIDiagnostics::Unknown;
 	} else {
 		if (good_percents == 0.f) diag = PIDiagnostics::Failure;
@@ -131,39 +121,41 @@ void PIDiagnostics::tick(void * data, int delimiter) {
 		qualityChanged(diag, qual);
 		qual = diag;
 	}
+	history_rec.dequeue();
+	history_send.dequeue();
+	Entry e;
+	if (diag != PIDiagnostics::Unknown) e.empty = false;
+	history_rec.enqueue(e);
+	history_send.enqueue(e);
 	unlock();
 }
 
 
-void PIDiagnostics::addToHistory(PIVector<PIDiagnostics::Entry> & hist, int bytes, bool ok) {
+PIDiagnostics::Entry PIDiagnostics::calcHistory(PIQueue<Entry> &hist, int * cnt) {
 	Entry e;
-	e.time = PISystemTime::current(true);
-	e.bytes = bytes;
-	e.ok = ok;
-	checkHistory(hist);
-	hist << e;
-}
-
-
-void PIDiagnostics::checkHistory(PIVector< PIDiagnostics::Entry > & hist) {
-	PISystemTime ctm = PISystemTime::current(true);
+	*cnt = 0;
 	for (int i = 0; i < hist.size_s(); ++i) {
-		if ((ctm - hist[i].time).abs() > disconn_st) {
-			hist.remove(i);
-			--i;
-		}
+		e.bytes_ok += hist[i].bytes_ok;
+		e.bytes_fail += hist[i].bytes_fail;
+		e.cnt_ok += hist[i].cnt_ok;
+		e.cnt_fail += hist[i].cnt_fail;
+		if (!e.empty) *cnt++;
 	}
+	return e;
 }
 
 
 void PIDiagnostics::propertyChanged(const PIString &) {
-	disconn_ = property("disconnectTimeout").toFloat();
-	changeDisconnectTimeout();
+	float disct = property("disconnectTimeout").toFloat();
+	changeDisconnectTimeout(disct);
 }
 
 
-void PIDiagnostics::changeDisconnectTimeout() {
+void PIDiagnostics::changeDisconnectTimeout(float disct) {
 	lock();
-	disconn_st = PISystemTime::fromSeconds(disconn_);
+	disconn_ = piMaxf(disct, interval());
+	int hist_size = piMaxi(int(disconn_ * 1000 / interval()), 1);
+	history_rec.resize(hist_size);
+	history_send.resize(hist_size);
 	unlock();
 }
diff --git a/src/io/pidiagnostics.h b/src/io/pidiagnostics.h
index 8a6ba83e..251a749d 100755
--- a/src/io/pidiagnostics.h
+++ b/src/io/pidiagnostics.h
@@ -51,7 +51,7 @@ public:
 	float disconnectTimeout() const {return disconn_;}
 	
 	//! Returns period of full disconnect in seconds and period of averaging frequency
-	void setDisconnectTimeout(float s) {setProperty("disconnectTimeout", s); disconn_ = s; changeDisconnectTimeout();}
+	void setDisconnectTimeout(float s) {setProperty("disconnectTimeout", s); changeDisconnectTimeout(s);}
 	
 	
 	//! Returns immediate receive frequency, packets/s
@@ -61,43 +61,43 @@ public:
 	float integralFrequency() const {return integral_freq;}
 	
 	//! Returns correct received packets per second
-	ullong receiveCountPerSec() const {return packets_in_sec;}
+	ullong receiveCountPerSec() const {return packets_recv_sec;}
 	
 	//! Returns sended packets per second
-	ullong sendCountPerSec() const {return packets_out_sec;}
+	ullong sendCountPerSec() const {return packets_send_sec;}
 	
 	//! Returns correct received bytes per second
-	ullong receiveBytesPerSec() const {return bytes_in_sec;}
+	ullong receiveBytesPerSec() const {return bytes_recv_sec;}
 	
 	//! Returns sended bytes per second
-	ullong sendBytesPerSec() const {return bytes_out_sec;}
+	ullong sendBytesPerSec() const {return bytes_send_sec;}
 	
 	//! Returns overall correct received bytes
-	ullong receiveBytes() const {return receive_bytes;}
+	ullong receiveBytes() const {return bytes_recv;}
 	
 	//! Returns overall wrong received bytes
-	ullong wrongBytes() const {return wrong_bytes;}
+	ullong wrongBytes() const {return bytes_wrong;}
 	
 	//! Returns overall sended bytes
-	ullong sendBytes() const {return send_bytes;}
+	ullong sendBytes() const {return bytes_send;}
 	
 	//! Returns overall correct received packets count
-	ullong receiveCount() const {return receive_count;}
+	ullong receiveCount() const {return count_recv;}
 	
 	//! Returns overall wrong received packets count
-	ullong wrongCount() const {return wrong_count;}
+	ullong wrongCount() const {return count_wrong;}
 	
 	//! Returns overall sended packets count
-	ullong sendCount() const {return send_count;}
+	ullong sendCount() const {return count_send;}
 	
 	//! Returns connection quality
 	PIDiagnostics::Quality quality() const {return qual;}
 	
 	//! Returns receive speed in format "n {B|kB|MB|GB|TB}/s"
-	PIString receiveSpeed() const {return speedIn;}
+	PIString receiveSpeed() const {return speedRecv;}
 	
 	//! Returns send speed in format "n {B|kB|MB|GB|TB}/s"
-	PIString sendSpeed() const {return speedOut;}
+	PIString sendSpeed() const {return speedSend;}
 	
 	
 	//! Returns immediate receive frequency pointer, packets/s. Useful for output to PIConsole
@@ -107,46 +107,46 @@ public:
 	const float * integralFrequency_ptr() const {return &integral_freq;}
 	
 	//! Returns correct received packets per second pointer. Useful for output to PIConsole
-	const ullong * receiveCountPerSec_ptr() const {return &packets_in_sec;}
+	const ullong * receiveCountPerSec_ptr() const {return &packets_recv_sec;}
 	
 	//! Returns sended packets per second pointer. Useful for output to PIConsole
-	const ullong * sendCountPerSec_ptr() const {return &packets_out_sec;}
+	const ullong * sendCountPerSec_ptr() const {return &packets_send_sec;}
 	
 	//! Returns correct received bytes per second pointer. Useful for output to PIConsole
-	const ullong * receiveBytesPerSec_ptr() const {return &bytes_in_sec;}
+	const ullong * receiveBytesPerSec_ptr() const {return &bytes_recv_sec;}
 	
 	//! Returns sended bytes per second pointer. Useful for output to PIConsole
-	const ullong * sendBytesPerSec_ptr() const {return &bytes_out_sec;}
+	const ullong * sendBytesPerSec_ptr() const {return &bytes_send_sec;}
 	
 	//! Returns overall correct received bytes pointer. Useful for output to PIConsole
-	const ullong * receiveBytes_ptr() const {return &receive_bytes;}
+	const ullong * receiveBytes_ptr() const {return &bytes_recv;}
 	
 	//! Returns overall wrong received bytes pointer. Useful for output to PIConsole
-	const ullong * wrongBytes_ptr() const {return &wrong_bytes;}
+	const ullong * wrongBytes_ptr() const {return &bytes_wrong;}
 	
 	//! Returns overall sended bytes pointer. Useful for output to PIConsole
-	const ullong * sendBytes_ptr() const {return &send_bytes;}
+	const ullong * sendBytes_ptr() const {return &bytes_send;}
 	
 	//! Returns overall correct received packets count pointer. Useful for output to PIConsole
-	const ullong * receiveCount_ptr() const {return &receive_count;}
+	const ullong * receiveCount_ptr() const {return &count_recv;}
 	
 	//! Returns overall wrong received packets count pointer. Useful for output to PIConsole
-	const ullong * wrongCount_ptr() const {return &wrong_count;}
+	const ullong * wrongCount_ptr() const {return &count_wrong;}
 	
 	//! Returns overall sended packets count pointer. Useful for output to PIConsole
-	const ullong * sendCount_ptr() const {return &send_count;}
+	const ullong * sendCount_ptr() const {return &count_send;}
 	
 	//! Returns connection quality pointer. Useful for output to PIConsole
 	const int * quality_ptr() const {return (int * )&qual;}
 	
 	//! Returns receive speed pointer in format "n {B|kB|MB|GB|TB}/s". Useful for output to PIConsole
-	const PIString * receiveSpeed_ptr() const {return &speedIn;}
+	const PIString * receiveSpeed_ptr() const {return &speedRecv;}
 	
 	//! Returns send speed pointer in format "n {B|kB|MB|GB|TB}/s". Useful for output to PIConsole
-	const PIString * sendSpeed_ptr() const {return &speedOut;}
+	const PIString * sendSpeed_ptr() const {return &speedSend;}
 	
-	EVENT_HANDLER0(void, start) {start(1000.); changeDisconnectTimeout();}
-	EVENT_HANDLER1(void, start, double, msecs) {if (msecs > 0.) {PITimer::start(msecs); changeDisconnectTimeout();}}
+	EVENT_HANDLER0(void, start) {start(100.); changeDisconnectTimeout(disconn_);}
+	EVENT_HANDLER1(void, start, double, msecs) {if (msecs > 0.) {PITimer::start(msecs); changeDisconnectTimeout(disconn_);}}
 	EVENT_HANDLER0(void, stop) {PITimer::stop();}
 	EVENT_HANDLER0(void, reset);
 	
@@ -182,27 +182,26 @@ public:
 	
 private:
 	struct Entry {
-		Entry() {ok = true; bytes = 0;}
-		PISystemTime time;
-		bool ok;
-		int bytes;
+		Entry() {bytes_ok = bytes_fail = 0; cnt_ok = cnt_fail = 0; empty = true;}
+		ullong bytes_ok;
+		ullong bytes_fail;
+		uint cnt_ok;
+		uint cnt_fail;
+		bool empty;
 	};
 	
 	void tick(void * data, int delimiter);
-	void addToHistory(PIVector<Entry> & hist, int bytes, bool ok = true);
-	void checkHistory(PIVector<Entry> & hist);
+	Entry calcHistory(PIQueue<Entry> & hist, int * cnt);
 	void propertyChanged(const PIString & );
-	void changeDisconnectTimeout();
+	void changeDisconnectTimeout(float disct);
 
 	PIDiagnostics::Quality qual;
-	PIString speedIn, speedOut;
-	float ifreq, immediate_freq, integral_freq, disconn_;
-	PIVector<Entry> history_rec, history_send;
-	PISystemTime disconn_st;
-	PITimeMeasurer tm;
-	char cur_pckt, rec_once;
-	ullong wrong_count, receive_count, send_count, wrong_bytes, receive_bytes, send_bytes;
-	ullong packets_in_sec, packets_out_sec, bytes_in_sec, bytes_out_sec;
+	PIString speedRecv, speedSend;
+	float ifreq, immediate_freq, integral_freq;
+	PIQueue<Entry> history_rec, history_send;
+	float disconn_;
+	ullong count_wrong, count_recv, count_send, bytes_wrong, bytes_recv, bytes_send;
+	ullong packets_recv_sec, packets_send_sec, bytes_recv_sec, bytes_send_sec;
 	
 };
 
diff --git a/src/io/pidir.cpp b/src/io/pidir.cpp
index 1a09d434..ab39af13 100755
--- a/src/io/pidir.cpp
+++ b/src/io/pidir.cpp
@@ -228,7 +228,7 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 	PIString p(dp);
 	if (dp == ".") dp.clear();
 	else if (!dp.endsWith(separator)) dp += separator;
-	//piCout << "entries from" << p;
+//	piCout << "start entries from" << p;
 #ifdef WINDOWS
 	if (dp == separator) {
 		char letters[1024];
@@ -287,6 +287,7 @@ PIVector<PIFile::FileInfo> PIDir::entries() {
 	}
 	free(list);
 #endif
+//	piCout << "end entries from" << p;
 	return l;
 }
 
diff --git a/src/io/piethernet.h b/src/io/piethernet.h
index 79bd2762..e3e7bd3f 100755
--- a/src/io/piethernet.h
+++ b/src/io/piethernet.h
@@ -42,7 +42,7 @@ public:
 		UDP /** UDP - User Datagram Protocol */ ,
 		TCP_Client /** TCP client - allow connection to TCP server */ ,
 		TCP_Server /** TCP server - receive connections from TCP clients */ ,
-		TCP_SingleTCP
+		TCP_SingleTCP /** TCP client single mode - connect & send & disconnect, on each packet */
 	};
 	
 	//! \brief Parameters of %PIEthernet
diff --git a/src/io/pifiletransfer.cpp b/src/io/pifiletransfer.cpp
index 03d8d31a..7d63420f 100644
--- a/src/io/pifiletransfer.cpp
+++ b/src/io/pifiletransfer.cpp
@@ -211,7 +211,7 @@ PIByteArray PIFileTransfer::buildPacket(Part p) {
 			bytes_file_cur = p.start;
 		return ba;
 	}
-	return PIByteArray();
+	return ba;
 }
 
 
@@ -286,11 +286,12 @@ void PIFileTransfer::receive_finished(bool ok) {
 		if (!ok || !user_ok) {
 			pftheader.session_id--;
 			started_ = false;
+			piCoutObj << "file cancel";
 			receiveFilesFinished(false);
 		} else resume();
 	}
 	if (pftheader.step == pft_Data) {
-		//piCout << "file close";
+		//piCoutObj << "file close";
 		work_file.close();
 		started_ = false;
 		receiveFilesFinished(ok);
@@ -299,7 +300,9 @@ void PIFileTransfer::receive_finished(bool ok) {
 
 
 void PIFileTransfer::send_finished(bool ok) {
-	//piCout << "file close";
-	work_file.close();
-	started_ = false;
+//	piCoutObj << "file close";
+	if (pftheader.step == pft_Data) {
+		work_file.close();
+		started_ = false;
+	}
 }
diff --git a/src/thread/pipipelinethread.h b/src/thread/pipipelinethread.h
new file mode 100644
index 00000000..c655d5cb
--- /dev/null
+++ b/src/thread/pipipelinethread.h
@@ -0,0 +1,129 @@
+#ifndef PIPIPELINETHREAD_H
+#define PIPIPELINETHREAD_H
+
+#include "pithread.h"
+
+template <typename T1, typename T2>
+class PIPipelineThread : public PIThread
+{
+	PIOBJECT_SUBCLASS(PIPipelineThread, PIThread)
+public:
+	PIPipelineThread() {
+		cnt = 0;
+		max_size = 0;
+		wait_next_pipe = true;
+		next_overload = false;
+	}
+	~PIPipelineThread() {
+		stop();
+		if (!waitForFinish(1000)) terminate();
+	}
+	template <typename T3>
+	void connectTo(PIPipelineThread<T2, T3> * next) {
+		CONNECT2(void, T2, bool *, this, calculated, next, enqueue)
+	}
+	EVENT2(calculated, const T2 &, v, bool *, overload)
+	EVENT_HANDLER1(void, enqueue, const T1 &, v) {enqueue(v, 0);}
+	EVENT_HANDLER2(void, enqueue, const T1 &, v, bool *, overload) {
+		mutex.lock();
+		if (max_size > 0 && in.size() < max_size) {
+			in.enqueue(v);
+			if (overload) *overload = false;
+		} else {
+			if (overload) *overload = true;
+		}
+		mutex.unlock();
+	}
+	const ullong * counterPtr() const {return &cnt;}
+	ullong counter() const {return cnt;}
+	bool isEmpty() {
+		bool ret;
+		mutex.lock();
+		ret = in.isEmpty();
+		mutex.unlock();
+		return ret;
+	}
+	int queSize() {
+		int ret;
+		mutex.lock();
+		ret = in.size();
+		mutex.unlock();
+		return ret;
+	}
+	void clear() {
+		mutex.lock();
+		in.clear();
+		next_overload = false;
+		mutex.unlock();
+	}
+	void stopCalc() {
+		if (isRunning()) {
+			stop();
+			if (!waitForFinish(100)) terminate();
+			mutex.unlock();
+			mutex_l.unlock();
+		}
+	}
+	T2 getLast() {
+		T2 ret;
+		mutex_l.lock();
+		ret = last;
+		mutex_l.unlock();
+		return ret;
+	}
+	
+	uint maxQueSize() {
+		uint ret;
+		mutex.lock();
+		ret = max_size;
+		mutex.unlock();
+		return ret;
+	}
+	
+	void setMaxQueSize(uint count) {
+		mutex.lock();
+		count = max_size;
+		if (max_size > 0 && in.size() > max_size) in.resize(max_size);
+		mutex.unlock();
+	}
+	
+	bool isWaitNextPipe() {return wait_next_pipe;}
+	void setWaitNextPipe(bool wait) {wait_next_pipe = wait;}
+
+protected:
+	virtual T2 calc(const T1 &v, bool &ok) = 0;
+
+private:
+	void begin() {cnt = 0;}
+	void run() {
+		mutex.lock();
+		if (in.isEmpty()) {
+			mutex.unlock();
+			piMSleep(1);
+			return;
+		}
+		if (next_overload) {
+			calculated(last, &next_overload);
+		} else {
+			T1 t = in.dequeue();
+			bool ok = true;
+			mutex.unlock();
+			T2 r = calc(t, ok);
+			mutex_l.lock();
+			last = r;
+			mutex_l.unlock();
+			cnt++;
+			if (ok) calculated(r, &next_overload);
+		}
+	}
+	PIQueue<T1> in;
+	T2 last;
+	PIMutex mutex;
+	PIMutex mutex_l;
+	ullong cnt;
+	uint max_size;
+	bool wait_next_pipe;
+	bool next_overload;
+};
+
+#endif // PIPIPELINETHREAD_H
diff --git a/utils/udp_file_transfer/main.cpp b/utils/udp_file_transfer/main.cpp
index 7cef756a..629c561a 100644
--- a/utils/udp_file_transfer/main.cpp
+++ b/utils/udp_file_transfer/main.cpp
@@ -8,17 +8,25 @@ using namespace PICoutManipulators;
 class UDPFileTransfer: public PITimer {
 	PIOBJECT_SUBCLASS(UDPFileTransfer, PITimer)
 public:
-	UDPFileTransfer(const PIString &src_ip_port, const PIString &dst_ip_port) {
+	UDPFileTransfer(const PIString &src_ip_port, const PIString &dst_ip_port, bool test = false) {
 		quet_ = false;
+		test_ = test;
 		eth.setReadAddress(src_ip_port);
 		eth.setSendAddress(dst_ip_port);
-		ft.setPacketSize(8192);
-		ft.setName("PIFT");
-		CONNECTU(&ft, sendRequest, this, ftsend);
-		CONNECTU(&ft, sendFilesStarted, this, ftevent);
-		CONNECTU(&ft, receiveFilesStarted, this, ftevent);
-		CONNECTU(&ft, sendFilesFinished, this, ftevent);
-		CONNECTU(&ft, receiveFilesFinished, this, ftevent);
+		if (test_) {
+			testt.setPacketSize(1280);
+			testt.setName("TEST");
+			//testt.setTimeout(0.1);
+			CONNECTU(&testt, sendRequest, this, ftsend);
+		} else {
+			ft.setPacketSize(1280);
+			ft.setName("PIFT");
+			CONNECTU(&ft, sendRequest, this, ftsend);
+			CONNECTU(&ft, sendFilesStarted, this, ftevent);
+			CONNECTU(&ft, receiveFilesStarted, this, ftevent);
+			CONNECTU(&ft, sendFilesFinished, this, ftevent);
+			CONNECTU(&ft, receiveFilesFinished, this, ftevent);
+		}
 		CONNECTU(&eth, threadedReadEvent, this, received);
 		start(50);
 		eth.setParameter(PIEthernet::SeparateSockets);
@@ -31,7 +39,14 @@ public:
 		ft.send(file);
 	}
 
+	void startTest() {
+		PIByteArray ba(1024*1024*64);
+		testt.send(ba);
+	}
+
 	PIFileTransfer ft;
+	PIDataTransfer testt;
+	bool test_;
 
 private:
 	PIEthernet eth;
@@ -44,30 +59,50 @@ private:
 				ft.stopSend();
 				ft.stopReceive();
 			}
-//			piCout << (int)ft.diagnostic().quality();
+			//			piCout << (int)ft.diagnostic().quality();
 		}
+		if (testt.isSending() || testt.isReceiving()) ftevent();
 	}
 
 	EVENT_HANDLER(void, ftevent) {
+		if (test_) {
+
+#ifdef WINDOWS
+			piCout
+		#else
+			PICout(AddSpaces) << ClearLine
+					 #endif
+							  << testt.stateString()
+							  << testt.diagnostic().receiveSpeed()
+							  << testt.diagnostic().sendSpeed()
+							  << "("
+							  << PIString::readableSize(testt.bytesCur()) << "/" << PIString::readableSize(testt.bytesAll())
+							  << ")"
+					 #ifndef WINDOWS
+							  << Flush
+					 #endif
+								 ;
+			return;
+		}
 		if (quet_) return;
 
 #ifdef WINDOWS
-	piCout
-#else
+		piCout
+		#else
 		PICout(AddSpaces) << ClearLine
-#endif
+					 #endif
 						  << ft.stateString() << ft.curFile()
-						  << PIString::readableSize(ft.diagnostic().receiveBytesPerSec()) + "/s"
-						  << PIString::readableSize(ft.diagnostic().sendBytesPerSec()) + "/s"
+						  << ft.diagnostic().receiveSpeed()
+						  << ft.diagnostic().sendSpeed()
 						  << "(" << PIString::readableSize(ft.bytesFileCur()) << "/" << PIString::readableSize(ft.bytesFileAll()) << ", "
 						  << PIString::readableSize(ft.bytesCur()) << "/" << PIString::readableSize(ft.bytesAll()) << ")"
 						  << "ETA" << (ft.diagnostic().receiveBytesPerSec() > 0 ?
 										   PIString::fromNumber(PISystemTime::fromSeconds((ft.bytesAll() - ft.bytesCur()) /
 																						  ft.diagnostic().receiveBytesPerSec()).toSeconds())
 										 : PIString("unknown"))
-#ifndef WINDOWS
+					 #ifndef WINDOWS
 						  << Flush
-#endif
+					 #endif
 							 ;
 	}
 
@@ -77,6 +112,10 @@ private:
 
 	EVENT_HANDLER2(void, received, uchar * , readed, int, size) {
 		PIByteArray ba(readed, size);
+		if(test_) {
+			testt.received(ba);
+			return;
+		}
 		ft.received(ba);
 	}
 };
@@ -95,13 +134,14 @@ void usage() {
 	piCout << "-p               " << Green << "- UDP port for transfer, by default 50005";
 	piCout << "-d <work_dir>    " << Green << "- directory, where place received files";
 	piCout << "<path>           " << Green << "- add path to send, if no path, then \"pift\" working in receive mode";
+	piCout << "-t               " << Green << "- test mode";
 }
 
 
 int main (int argc, char * argv[]) {
 	PICLI cli(argc, argv);
 	PIINTROSPECTION_START
-	cli.setOptionalArgumentsCount(-1);
+			cli.setOptionalArgumentsCount(-1);
 	cli.addArgument("send", true);
 	cli.addArgument("receive", true);
 	cli.addArgument("dir", true);
@@ -109,6 +149,28 @@ int main (int argc, char * argv[]) {
 	cli.addArgument("help");
 	cli.addArgument("quet");
 	cli.addArgument("fullpath");
+	cli.addArgument("test", true);
+	if (cli.hasArgument("test")) {
+		PIString src;
+		PIString dst;
+		bool send_ = false;
+		if (cli.argumentValue("test") == "1") {
+			src = "127.0.0.1:50005";
+			dst = "127.0.0.1:50006";
+			send_ = true;
+		} else {
+			src = "127.0.0.1:50006";
+			dst = "127.0.0.1:50005";
+		}
+		if (cli.hasArgument("send") && cli.hasArgument("receive") && cli.hasArgument("fullpath")) {
+			src = cli.argumentValue("receive");
+			dst = cli.argumentValue("send");
+		}
+		UDPFileTransfer tuf(src, dst, true);
+		if (send_) tuf.startTest();
+		WAIT_FOREVER;
+		return 0;
+	}
 	if ((!cli.hasArgument("send") || !cli.hasArgument("receive")) || cli.hasArgument("help")) {
 		usage();
 		return 0;
@@ -137,8 +199,9 @@ int main (int argc, char * argv[]) {
 	} else {
 		piCout << "wait for receiving";
 	}
+	kbd.start();
 	WAIT_FOR_EXIT
-	PICout(0) << "\n";
+			PICout(0) << "\n";
 	return 0;
 
 }