diff --git a/CMakeLists.txt b/CMakeLists.txt
index bff4290e..eeb11129 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 3.0)
 cmake_policy(SET CMP0017 NEW) # need include() with .cmake
 project(pip)
 set(pip_MAJOR    2)
-set(pip_MINOR    32)
+set(pip_MINOR    33)
 set(pip_REVISION 0)
 set(pip_SUFFIX   )
 set(pip_COMPANY  SHS)
diff --git a/libs/main/core/pibase.h b/libs/main/core/pibase.h
index d89d525e..8c978f93 100644
--- a/libs/main/core/pibase.h
+++ b/libs/main/core/pibase.h
@@ -285,10 +285,10 @@
 #define FOREVER for (;;)
 
 //! Macro used for infinite wait
-#define FOREVER_WAIT FOREVER msleep(PIP_MIN_MSLEEP);
+#define FOREVER_WAIT FOREVER piMinSleep;
 
 //! Macro used for infinite wait
-#define WAIT_FOREVER FOREVER msleep(PIP_MIN_MSLEEP);
+#define WAIT_FOREVER FOREVER piMinSleep;
 
 
 //! global variable enabling output to piCout, default is true
diff --git a/libs/main/core/piobject.cpp b/libs/main/core/piobject.cpp
index 5a2c0eb6..7a7ae457 100644
--- a/libs/main/core/piobject.cpp
+++ b/libs/main/core/piobject.cpp
@@ -749,7 +749,7 @@ void PIObject::Deleter::deleteObject(PIObject * o) {
 	//piCout << "[Deleter] delete" << (uintptr_t)o << "...";
 	if (o->isPIObject()) {
 		//piCout << "[Deleter] delete" << (uintptr_t)o << "wait atomic ...";
-		while (o->isInEvent()) piMSleep(PIP_MIN_MSLEEP);
+		while (o->isInEvent()) piMinSleep();
 		//piCout << "[Deleter] delete" << (uintptr_t)o << "wait atomic done";
 		delete o;
 	}
diff --git a/libs/main/core/pitime.h b/libs/main/core/pitime.h
index 8416ab70..316811ed 100644
--- a/libs/main/core/pitime.h
+++ b/libs/main/core/pitime.h
@@ -46,6 +46,8 @@ inline void piMSleep(double msecs) {piUSleep(int(msecs * 1000.));} // on !Window
  * \details This function exec \a piUSleep (msecs * 1000000). */
 inline void piSleep(double secs) {piUSleep(int(secs * 1000000.));} // on !Windows consider constant "usleep" offset
 
+//! Shortest available on current system sleep
+inline void piMinSleep() {piMSleep(PIP_MIN_MSLEEP);}
 
 
 
diff --git a/libs/main/io_devices/piethernet.cpp b/libs/main/io_devices/piethernet.cpp
index 2277184b..7f2e797e 100644
--- a/libs/main/io_devices/piethernet.cpp
+++ b/libs/main/io_devices/piethernet.cpp
@@ -686,7 +686,7 @@ int PIEthernet::readDevice(void * read_to, int max_size) {
 		s = accept(sock, (sockaddr * )&client_addr, &slen);
 		if (s == -1) {
 			//piCoutObj << "Can`t accept new connection, " << ethErrorString();
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 			return -1;
 		}
 		rs = ethRecv(s, read_to, max_size);
@@ -788,7 +788,7 @@ int PIEthernet::writeDevice(const void * data, int max_size) {
 		//piCoutObj << "connect SingleTCP" << ip_s << ":" << port_s << "...";
 		if (::connect(sock, (sockaddr * )&PRIVATE->addr_, sizeof(PRIVATE->addr_)) != 0) {
 			//piCoutObj << "Can`t connect to " << ip_s << ":" << port_s << ", " << ethErrorString();
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 			return -1;
 		}
 		//piCoutObj << "ok, write SingleTCP" << int(data) << max_size << "bytes ...";
diff --git a/libs/main/io_devices/piiodevice.cpp b/libs/main/io_devices/piiodevice.cpp
index 62d14038..7e1c1863 100644
--- a/libs/main/io_devices/piiodevice.cpp
+++ b/libs/main/io_devices/piiodevice.cpp
@@ -254,7 +254,7 @@ void PIIODevice::write_func() {
 			int ret = write(item.first);
 			threadedWriteEvent(item.second, ret);
 		}
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	}
 }
 
@@ -338,7 +338,7 @@ PIByteArray PIIODevice::readForTime(double timeout_ms) {
 	tm.reset();
 	while (tm.elapsed_m() < timeout_ms) {
 		ret = read(td, threaded_read_buffer_size);
-		if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+		if (ret <= 0) piMinSleep();
 		else str.append(td, ret);
 	}
 	delete[] td;
diff --git a/libs/main/io_devices/piserial.cpp b/libs/main/io_devices/piserial.cpp
index 0c4c64fa..33484c1b 100644
--- a/libs/main/io_devices/piserial.cpp
+++ b/libs/main/io_devices/piserial.cpp
@@ -434,7 +434,7 @@ bool PISerial::read(void * data, int size, double timeout_ms) {
 		while (all < size && tm_.elapsed_m() < timeout_ms) {
 			ret = readDevice(&((uchar * )data)[all], size - all);
 			if (ret > 0) all += ret;
-			else piMSleep(PIP_MIN_MSLEEP);
+			else piMinSleep();
 		}
 		setOption(BlockingRead, br);
 		received(data, all);
@@ -473,13 +473,13 @@ PIString PISerial::read(int size, double timeout_ms) {
 		if (size <= 0) {
 			while (tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, 1024);
-				if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else str << PIString((char*)td, ret);
 			}
 		} else {
 			while (all < size && tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, size - all);
-				if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else {
 					str << PIString((char*)td, ret);
 					all += ret;
@@ -493,7 +493,7 @@ PIString PISerial::read(int size, double timeout_ms) {
 		str << PIString((char*)td, all);
 		while (all < size) {
 			ret = readDevice(td, size - all);
-			if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+			if (ret <= 0) piMinSleep();
 			else {
 				str << PIString((char*)td, ret);
 				all += ret;
@@ -525,13 +525,13 @@ PIByteArray PISerial::readData(int size, double timeout_ms) {
 		if (size <= 0) {
 			while (tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, 1024);
-				if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else str.append(td, ret);
 			}
 		} else {
 			while (all < size && tm_.elapsed_m() < timeout_ms) {
 				ret = readDevice(td, size - all);
-				if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+				if (ret <= 0) piMinSleep();
 				else {
 					str.append(td, ret);
 					all += ret;
@@ -545,7 +545,7 @@ PIByteArray PISerial::readData(int size, double timeout_ms) {
 		str.append(td, all);
 		while (all < size) {
 			ret = readDevice(td, size - all);
-			if (ret <= 0) piMSleep(PIP_MIN_MSLEEP);
+			if (ret <= 0) piMinSleep();
 			else {
 				str.append(td, ret);
 				all += ret;
diff --git a/libs/main/io_utils/pibasetransfer.cpp b/libs/main/io_utils/pibasetransfer.cpp
index 1b2f9bf2..7f18c752 100644
--- a/libs/main/io_utils/pibasetransfer.cpp
+++ b/libs/main/io_utils/pibasetransfer.cpp
@@ -346,7 +346,7 @@ bool PIBaseTransfer::send_process() {
 		if (chk == 0) return finish_send(true);
 		if (chk != prev_chk) rtm.reset();
 		else if (rtm.elapsed_m() < 100) {
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 			continue;
 		}
 		if (is_pause) {
@@ -507,7 +507,7 @@ bool PIBaseTransfer::getStartRequest() {
 			return true;
 		}
 		mutex_session.unlock();
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	}
 	return false;
 }
diff --git a/libs/main/system/piprocess.cpp b/libs/main/system/piprocess.cpp
index 2f00d975..7158ddcd 100644
--- a/libs/main/system/piprocess.cpp
+++ b/libs/main/system/piprocess.cpp
@@ -66,7 +66,7 @@ void PIProcess::exec_() {
 	startOnce();
 	//cout << "exec wait" << endl;
 	while (!is_exec)
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	//cout << "exec end" << endl;
 }
 
@@ -172,7 +172,7 @@ void PIProcess::startProc(bool detached) {
 		if (execve(str.data(), a, e) < 0)
 			piCoutObj << "\"execve" << str << args << "\" error :" << errorString();
 	} else {
-		msleep(PIP_MIN_MSLEEP);
+		piMinSleep;
 		//cout << "wait" << endl;
 		if (!detached) {
 			wait(&exit_code);
diff --git a/libs/main/thread/pigrabberbase.h b/libs/main/thread/pigrabberbase.h
index a45d2197..6bb2843b 100644
--- a/libs/main/thread/pigrabberbase.h
+++ b/libs/main/thread/pigrabberbase.h
@@ -162,7 +162,7 @@ private:
 				return;
 			}
 			if (ret > 0) {
-				piMSleep(PIP_MIN_MSLEEP);
+				piMinSleep();
 				return;
 			}
 			diag_.received(1);
diff --git a/libs/main/thread/pithread.cpp b/libs/main/thread/pithread.cpp
index b28b2c34..863d6a63 100644
--- a/libs/main/thread/pithread.cpp
+++ b/libs/main/thread/pithread.cpp
@@ -402,7 +402,7 @@ bool PIThread::waitForFinish(int timeout_msecs) {
 	if (!running_) return true;
 	if (timeout_msecs < 0) {
 		while (running_) {
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 #ifdef WINDOWS
 			if (!isExists(PRIVATE->thread)) {
 				unlock();
@@ -414,7 +414,7 @@ bool PIThread::waitForFinish(int timeout_msecs) {
 	}
 	tmf_.reset();
 	while (running_ && tmf_.elapsed_m() < timeout_msecs) {
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 #ifdef WINDOWS
 		if (!isExists(PRIVATE->thread)) {
 			unlock();
@@ -430,12 +430,12 @@ bool PIThread::waitForStart(int timeout_msecs) {
 	if (running_) return true;
 	if (timeout_msecs < 0) {
 		while (!running_)
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 		return true;
 	}
 	tms_.reset();
 	while (!running_ && tms_.elapsed_m() < timeout_msecs)
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	return tms_.elapsed_m() < timeout_msecs;
 }
 
diff --git a/libs/main/thread/pitimer.cpp b/libs/main/thread/pitimer.cpp
index c94b6c73..83e94885 100644
--- a/libs/main/thread/pitimer.cpp
+++ b/libs/main/thread/pitimer.cpp
@@ -648,11 +648,11 @@ bool PITimer::stop(bool wait) {
 bool PITimer::waitForFinish(int timeout_msecs) {
 	if (timeout_msecs < 0) {
 		while (isRunning())
-			piMSleep(PIP_MIN_MSLEEP);
+			piMinSleep();
 		return true;
 	}
 	PITimeMeasurer tm;
 	while (isRunning() && tm.elapsed_m() < timeout_msecs)
-		piMSleep(PIP_MIN_MSLEEP);
+		piMinSleep();
 	return tm.elapsed_m() < timeout_msecs;
 }