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Changeset 938

Timestamp:

03/12/08 04:48:37 (14 years ago)

Author:

ppalmers

Message:

implement static iso handler scheduling

Files:

trunk/libffado/config.h.in (modified) (1 diff)
trunk/libffado/src/libieee1394/IsoHandlerManager.cpp (modified) (22 diffs)
trunk/libffado/src/libieee1394/IsoHandlerManager.h (modified) (4 diffs)
trunk/libffado/src/libstreaming/generic/StreamProcessor.cpp (modified) (1 diff)

Legend:

: Unmodified
: Added
: Removed
: Modified
: Copied
: Moved

trunk/libffado/config.h.in

r936	r938
67	67	#define ISOHANDLERMANAGER_MAX_ISO_HANDLERS_PER_PORT 16
68	68	#define ISOHANDLERMANAGER_MAX_STREAMS_PER_ISOTHREAD 16
69		// the transmit thread should run at elevated priority since it
70		// should push packets into the kernel ASAP
71		#define ISOHANDLERMANAGER_TRANSMIT_PRIO_INCREASE 1
72		// the receive thread should have lower priority than the transmit one, since
73		// it should be interrupted once it has flagged the semaphore that indicates
74		// one period of frames.
75		#define ISOHANDLERMANAGER_RECEIVE_PRIO_INCREASE -6
	69
	70	// Ideally the audio processing will be driven by this thread
	71	#define ISOHANDLERMANAGER_ISO_PRIO_INCREASE 1
76	72
77	73	// allows to add some processing margin. This shifts the time

trunk/libffado/src/libieee1394/IsoHandlerManager.cpp

r937	r938
43	43	// --- ISO Thread --- //
44	44
45		IsoTask::IsoTask(IsoHandlerManager& manager~~, enum IsoTask::eTaskType t~~)
	45	IsoTask::IsoTask(IsoHandlerManager& manager)
46	46	: m_manager( manager )
47		, m_~~type( t~~ )
	47	, m_SyncIsoHandler ( NULL )
48	48	{
49	49	}
…	…
66	66	IsoTask::requestShadowMapUpdate()
67	67	{
68		debugOutput(DEBUG_LEVEL_VERBOSE, "~~enter\n"~~);
	68	debugOutput(DEBUG_LEVEL_VERBOSE, "(%p) enter\n", this);
69	69	INC_ATOMIC(&request_update);
70	70	return true;
…	…
73	73	// updates the internal stream map
74	74	// note that this should be executed with the guarantee that
75		// nobody will modify
	75	// nobody will modify the parent data structures
76	76	void
77	77	IsoTask::updateShadowMapHelper()
78	78	{
79		debugOutput( DEBUG_LEVEL_VERBOSE, "~~updating shadow vars...\n"~~);
	79	debugOutput( DEBUG_LEVEL_VERBOSE, "(%p) updating shadow vars...\n", this);
80	80	unsigned int i, cnt, max;
81	81	max = m_manager.m_IsoHandlers.size();
	82	m_SyncIsoHandler = NULL;
82	83	for (i = 0, cnt = 0; i < max; i++) {
83	84	IsoHandler *h = m_manager.m_IsoHandlers.at(i);
84	85	assert(h);
85
86		~~// skip handlers of the wrong type~~
87		~~if (h->getType() == IsoHandler::eHT_Receive && m_type == eTT_Transmit) continue;~~
88		~~if (h->getType() == IsoHandler::eHT_Transmit && m_type == eTT_Receive) continue;~~
89	86
90	87	if (h->isEnabled()) {
…	…
94	91	m_poll_fds_shadow[cnt].events = POLLIN;
95	92	cnt++;
96		debugOutput( DEBUG_LEVEL_VERBOSE, "%s handler %p added\n", h->getTypeString(), h);
	93	// FIXME: need a more generic approach here
	94	if( m_SyncIsoHandler == NULL
	95	&& h->getType() == IsoHandler::eHT_Transmit) {
	96	m_SyncIsoHandler = h;
	97	}
	98
	99	debugOutput( DEBUG_LEVEL_VERBOSE, "(%p) %s handler %p added\n",
	100	this, h->getTypeString(), h);
97	101	} else {
98		debugOutput( DEBUG_LEVEL_VERBOSE, "%s handler %p skipped (disabled)\n", h->getTypeString(), h);
	102	debugOutput( DEBUG_LEVEL_VERBOSE, "(%p) %s handler %p skipped (disabled)\n",
	103	this, h->getTypeString(), h);
99	104	}
100	105	if(cnt > ISOHANDLERMANAGER_MAX_ISO_HANDLERS_PER_PORT) {
…	…
103	108	}
104	109	}
	110
	111	// FIXME: need a more generic approach here
	112	// if there are no active transmit handlers,
	113	// use the first receive handler
	114	if( m_SyncIsoHandler == NULL
	115	&& m_poll_nfds_shadow) {
	116	m_SyncIsoHandler = m_IsoHandler_map_shadow[0];
	117	}
105	118	m_poll_nfds_shadow = cnt;
106		debugOutput( DEBUG_LEVEL_VERBOSE, " ~~updated shadow vars...\n"~~);
	119	debugOutput( DEBUG_LEVEL_VERBOSE, "(%p) updated shadow vars...\n", this);
107	120	}
108	121
…	…
111	124	{
112	125	debugOutputExtreme(DEBUG_LEVEL_VERY_VERBOSE,
113		"(%p, %s) Execute\n",
114		this, m_type==eTT_Transmit?"Transmit":"Receive");
	126	"(%p) Execute\n", this);
115	127	int err;
116	128	unsigned int i;
…	…
126	138	if (m_poll_nfds_shadow == 0) {
127	139	debugOutputExtreme(DEBUG_LEVEL_VERY_VERBOSE,
128		"(%p~~, %8s~~) bypass iterate since no handlers to poll\n",
129		this~~, m_type==eTT_Transmit?"Transmit":"Receive"~~);
	140	"(%p) bypass iterate since no handlers to poll\n",
	141	this);
130	142	usleep(m_poll_timeout * 1000);
131	143	return true;
…	…
139	151	bool no_one_to_poll = true;
140	152	while(no_one_to_poll) {
141		if (m_type==eTT_Transmit) {
142		// if we are a transmit thread, we should only poll on
143		// those handlers that have a client that is ready to send
144		// something. poll'ing the others will only cause busy-wait
145		// looping.
146		for (i = 0; i < m_poll_nfds_shadow; i++) {
147		short events = 0;
148		if (m_IsoHandler_map_shadow[i]->tryWaitForClient()) {
	153	for (i = 0; i < m_poll_nfds_shadow; i++) {
	154	short events = 0;
	155	IsoHandler *h = m_IsoHandler_map_shadow[i];
	156	if(h->getType() == IsoHandler::eHT_Transmit) {
	157	// we should only poll on a transmit handler
	158	// that has a client that is ready to send
	159	// something. Otherwise it will end up in
	160	// busy wait looping since the packet function
	161	// will defer processing (also avoids the
	162	// AGAIN problem)
	163	if (h->tryWaitForClient()) {
149	164	events = POLLIN \| POLLPRI;
150	165	no_one_to_poll = false;
151	166	}
152		m_poll_fds_shadow[i].events = events;
153		}
154		} else {
155		// for receive handlers, we can do the same. we might not have to though
156		for (i = 0; i < m_poll_nfds_shadow; i++) {
157		short events = 0;
158		if (m_IsoHandler_map_shadow[i]->tryWaitForClient()) {
159		events = POLLIN \| POLLERR \| POLLHUP;
	167	} else {
	168	// a receive handler should only be polled if
	169	// it's client doesn't already have enough data
	170	// and if it can still accept data.
	171	if (h->tryWaitForClient()) { // FIXME
	172	events = POLLIN \| POLLPRI;
160	173	no_one_to_poll = false;
161	174	}
162		m_poll_fds_shadow[i].events = events;
163		}
164		}
	175	}
	176	m_poll_fds_shadow[i].events = events;
	177	}
	178
165	179	if(no_one_to_poll) {
166	180	debugOutputExtreme(DEBUG_LEVEL_VERY_VERBOSE,
167		"(%p, %8s) No one to poll, waiting on the first handler to become ready\n",
168		this, m_type==eTT_Transmit?"Transmit":"Receive");
169
170		m_IsoHandler_map_shadow[0]->waitForClient();
	181	"(%p) No one to poll, waiting on the sync handler to become ready\n",
	182	this);
	183
	184	if(!m_SyncIsoHandler->waitForClient()) {
	185	debugError("Failed to wait for client\n");
	186	return false;
	187	}
	188
	189	#ifdef DEBUG
	190	// if this happens we end up in a deadlock!
	191	if(!m_SyncIsoHandler->tryWaitForClient()) {
	192	debugFatal("inconsistency in wait functions!\n");
	193	return false;
	194	}
	195	#endif
171	196
172	197	debugOutputExtreme(DEBUG_LEVEL_VERY_VERBOSE,
173		"(%p, %8s) handler ready\n",
174		this, m_type==eTT_Transmit?"Transmit":"Receive");
175		}
176		}
177
178		// Use a shadow map of the fd's such that the poll call is not in a critical section
	198	"(%p) sync handler ready\n",
	199	this);
	200	}
	201	}
	202
	203	// Use a shadow map of the fd's such that we don't have to update
	204	// the fd map everytime we run poll(). It doesn't change that much
	205	// anyway
179	206	err = poll (m_poll_fds_shadow, m_poll_nfds_shadow, m_poll_timeout);
180	207
…	…
201	228	// if we get here, it means two things:
202	229	// 1) the kernel can accept or provide packets (poll returned POLLIN)
203		// 2) the client can provide or accept packets (we enabled polling)
	230	// 2) the client can provide or accept packets (since we enabled polling)
204	231	if(m_poll_fds_shadow[i].revents & (POLLIN)) {
205	232	m_IsoHandler_map_shadow[i]->iterate();
…	…
238	265	, m_service( service )
239	266	, m_realtime(false), m_priority(0)
240		, m_ReceiveThread ( NULL )
241		, m_TransmitThread ( NULL )
242		, m_ReceiveTask ( NULL )
243		, m_TransmitTask ( NULL )
	267	, m_IsoThread ( NULL )
	268	, m_IsoTask ( NULL )
244	269	{}
245	270
…	…
248	273	, m_service( service )
249	274	, m_realtime(run_rt), m_priority(rt_prio)
250		, m_ReceiveThread ( NULL )
251		, m_TransmitThread ( NULL )
252		, m_ReceiveTask ( NULL )
253		, m_TransmitTask ( NULL )
	275	, m_IsoThread ( NULL )
	276	, m_IsoTask ( NULL )
254	277	{}
255	278
…	…
261	284	debugError("Still some handlers in use\n");
262	285	}
263		if (m_ReceiveThread) {
264		m_ReceiveThread->Stop();
265		delete m_ReceiveThread;
266		}
267		if (m_ReceiveTask) {
268		delete m_ReceiveTask;
269		}
270
271		if (m_TransmitThread) {
272		m_TransmitThread->Stop();
273		delete m_TransmitThread;
274		}
275		if (m_TransmitTask) {
276		delete m_TransmitTask;
	286	if (m_IsoThread) {
	287	m_IsoThread->Stop();
	288	delete m_IsoThread;
	289	}
	290	if (m_IsoTask) {
	291	delete m_IsoTask;
277	292	}
278	293	}
…	…
284	299	m_realtime = rt;
285	300	m_priority = priority;
286		bool result = true;
287
288		if (m_ReceiveThread) {
	301
	302	if (m_IsoThread) {
289	303	if (m_realtime) {
290		m_~~Receive~~Thread->AcquireRealTime(m_priority);
	304	m_IsoThread->AcquireRealTime(m_priority);
291	305	} else {
292		m_ReceiveThread->DropRealTime();
293		}
294		}
295		if (m_TransmitThread) {
296		if (m_realtime) {
297		m_TransmitThread->AcquireRealTime(m_priority);
298		} else {
299		m_TransmitThread->DropRealTime();
300		}
301		}
302
303		return result;
	306	m_IsoThread->DropRealTime();
	307	}
	308	}
	309
	310	return true;
304	311	}
305	312
…	…
313	320	}
314	321
315		// create a thread to iterate our ~~receive~~ handlers
316		debugOutput( DEBUG_LEVEL_VERBOSE, "Create ~~receive~~ thread for %p...\n", this);
317		m_~~ReceiveTask = new IsoTask( *this, IsoTask::eTT_Receive~~ );
318		if(!m_~~Receive~~Task) {
	322	// create a thread to iterate our ISO handlers
	323	debugOutput( DEBUG_LEVEL_VERBOSE, "Create iso thread for %p...\n", this);
	324	m_IsoTask = new IsoTask( *this );
	325	if(!m_IsoTask) {
319	326	debugFatal("No task\n");
320	327	return false;
321	328	}
322		m_~~ReceiveThread = new Util::PosixThread(m_Receive~~Task, m_realtime,
323		~~m_priority + ISOHANDLERMANAGER_RECEIVE~~_PRIO_INCREASE,
324		PTHREAD_CANCEL_DEFERRED);
325
326		if(!m_~~Receive~~Thread) {
	329	m_IsoThread = new Util::PosixThread(m_IsoTask, m_realtime,
	330	m_priority + ISOHANDLERMANAGER_ISO_PRIO_INCREASE,
	331	PTHREAD_CANCEL_DEFERRED);
	332
	333	if(!m_IsoThread) {
327	334	debugFatal("No thread\n");
328	335	return false;
329	336	}
330		if (m_ReceiveThread->Start() != 0) {
331		debugFatal("Could not start receive thread\n");
332		return false;
333		}
334
335		// create a thread to iterate our transmit handlers
336		debugOutput( DEBUG_LEVEL_VERBOSE, "Create transmit thread for %p...\n", this);
337		m_TransmitTask = new IsoTask( *this, IsoTask::eTT_Transmit );
338		if(!m_TransmitTask) {
339		debugFatal("No task\n");
340		return false;
341		}
342		m_TransmitThread = new Util::PosixThread(m_TransmitTask, m_realtime,
343		m_priority + ISOHANDLERMANAGER_TRANSMIT_PRIO_INCREASE,
344		PTHREAD_CANCEL_DEFERRED);
345		if(!m_TransmitThread) {
346		debugFatal("No thread\n");
347		return false;
348		}
349		if (m_TransmitThread->Start() != 0) {
350		debugFatal("Could not start transmit thread\n");
	337	if (m_IsoThread->Start() != 0) {
	338	debugFatal("Could not start ISO thread\n");
351	339	return false;
352	340	}
353	341
354	342	m_State=E_Running;
355		~~return true;~~
356		}
357
358
359		~~bool~~
360		~~IsoHandlerManager::updateShadowMapFor(IsoHandler *h)~~
361		{
362		~~// update the shadow map~~
363		~~if(h->getType() == IsoHandler::eHT_Receive) {~~
364		~~if(!m_ReceiveTask->requestShadowMapUpdate()) {~~
365		~~debugError("failed to update shadow map\n");~~
366		~~return false;~~
367		}
368		~~} else {~~
369		~~if(!m_TransmitTask->requestShadowMapUpdate()) {~~
370		~~debugError("failed to update shadow map\n");~~
371		~~return false;~~
372		}
373		}
374	343	return true;
375	344	}
…	…
386	355	if ((*it) == h) {
387	356	result = h->disable();
388		result &= ~~updateShadowMapFor(h~~);
	357	result &= m_IsoTask->requestShadowMapUpdate();
389	358	debugOutput(DEBUG_LEVEL_VERY_VERBOSE, " disabled\n");
390	359	return result;
…	…
407	376	if ((*it) == h) {
408	377	result = h->enable();
409		result &= ~~updateShadowMapFor(h~~);
	378	result &= m_IsoTask->requestShadowMapUpdate();
410	379	debugOutput(DEBUG_LEVEL_VERY_VERBOSE, " enabled\n");
411	380	return result;
…	…
423	392	handler->setVerboseLevel(getDebugLevel());
424	393	m_IsoHandlers.push_back(handler);
425		return ~~updateShadowMapFor(handler~~);
	394	return m_IsoTask->requestShadowMapUpdate();
426	395	}
427	396
…	…
437	406	if ( *it == handler ) {
438	407	m_IsoHandlers.erase(it);
439		return ~~updateShadowMapFor(handler~~);
	408	return m_IsoTask->requestShadowMapUpdate();
440	409	}
441	410	}
…	…
675	644	return false;
676	645	}
677		if(!~~updateShadowMapFor(*it~~)) {
	646	if(!m_IsoTask->requestShadowMapUpdate()) {
678	647	debugOutput( DEBUG_LEVEL_VERBOSE, " could not update shadow map for handler (%p)\n",*it);
679	648	return false;
…	…
736	705	return false;
737	706	}
738		if(!~~updateShadowMapFor(*it~~)) {
	707	if(!m_IsoTask->requestShadowMapUpdate()) {
739	708	debugOutput( DEBUG_LEVEL_VERBOSE, " could not update shadow map for handler (%p)\n",*it);
740	709	return false;
…	…
767	736	retval=false;
768	737	}
769		if(!~~updateShadowMapFor(*it~~)) {
	738	if(!m_IsoTask->requestShadowMapUpdate()) {
770	739	debugOutput( DEBUG_LEVEL_VERBOSE, " could not update shadow map for handler (%p)\n",*it);
771	740	retval=false;
…	…
801	770	(*it)->setVerboseLevel(i);
802	771	}
803		if(m_ReceiveThread) m_ReceiveThread->setVerboseLevel(i);
804		if(m_ReceiveTask) m_ReceiveTask->setVerboseLevel(i);
805		if(m_TransmitThread) m_TransmitThread->setVerboseLevel(i);
806		if(m_TransmitTask) m_TransmitTask->setVerboseLevel(i);
	772	if(m_IsoThread) m_IsoThread->setVerboseLevel(i);
	773	if(m_IsoTask) m_IsoTask->setVerboseLevel(i);
807	774	}
808	775

trunk/libffado/src/libieee1394/IsoHandlerManager.h

r904	r938
57	57	{
58	58	public:
59		enum eTaskType {
60		eTT_Receive,
61		eTT_Transmit,
62		};
63		IsoTask(IsoHandlerManager& manager, enum IsoTask::eTaskType t);
	59	IsoTask(IsoHandlerManager& manager);
64	60	virtual ~IsoTask() {};
65	61
…	…
76	72	protected:
77	73	IsoHandlerManager& m_manager;
78		~~enum eTaskType m_type;~~
79	74
80	75	// the event request structure
…	…
84	79	// this is the map used by the actual thread
85	80	// it is a shadow of the m_StreamProcessors vector
86		struct pollfd m_poll_fds_shadow[ISOHANDLERMANAGER_MAX_ISO_HANDLERS_PER_PORT];
87		IsoHandler *m_IsoHandler_map_shadow[ISOHANDLERMANAGER_MAX_ISO_HANDLERS_PER_PORT];
88		unsigned int m_poll_nfds_shadow;
	81	struct pollfd m_poll_fds_shadow[ISOHANDLERMANAGER_MAX_ISO_HANDLERS_PER_PORT];
	82	IsoHandler * m_IsoHandler_map_shadow[ISOHANDLERMANAGER_MAX_ISO_HANDLERS_PER_PORT];
	83	unsigned int m_poll_nfds_shadow;
	84	IsoHandler * m_SyncIsoHandler;
89	85
90	86	// updates the streams map
…	…
187	183	Streaming::StreamProcessorVector m_StreamProcessors;
188	184
189		// thread params for the handler threads
190		bool m_realtime;
191		int m_priority;
192		// handler threads
193		Util::Thread * m_ReceiveThread;
194		Util::Thread * m_TransmitThread;
195
196		// actual tasks
197		IsoTask * m_ReceiveTask;
198		IsoTask * m_TransmitTask;
199
200		bool updateShadowMapFor(IsoHandler *h);
	185	// handler thread/task
	186	bool m_realtime;
	187	int m_priority;
	188	Util::Thread * m_IsoThread;
	189	IsoTask * m_IsoTask;
201	190
202	191	// debug stuff

trunk/libffado/src/libstreaming/generic/StreamProcessor.cpp

r937	r938
1769	1769	if(m_in_xrun) return true;
1770	1770	if(m_state == ePS_Running && m_next_state == ePS_Running) {
1771		// check whether we already fullfil the criterion
1772		unsigned int bufferspace = m_data_buffer->getBufferSpace();
1773		if(bufferspace >= nframes) {
1774		return true;
1775		} else return false;
	1771
	1772	if(getType() == ePT_Transmit) {
	1773	// can we put a certain amount of frames into the buffer?
	1774	unsigned int bufferspace = m_data_buffer->getBufferSpace();
	1775	if(bufferspace >= nframes) {
	1776	return true;
	1777	} else return false;
	1778	} else {
	1779	// do we still have to put frames in the buffer?
	1780	unsigned int bufferfill = m_data_buffer->getBufferFill();
	1781	unsigned int periodsize = m_StreamProcessorManager.getPeriodSize();
	1782	if (bufferfill > periodsize) return false;
	1783	else return true;
	1784	}
	1785
	1786
1776	1787	} else {
1777	1788	if(getType() == ePT_Transmit) {

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