Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <iostream>
#include <stdio.h>
#include <cmath>
#include "pbd/compose.h"
#include "pbd/cpus.h"
+#include "pbd/debug_rt_alloc.h"
#include "ardour/debug.h"
#include "ardour/graph.h"
using namespace PBD;
using namespace std;
+#ifdef DEBUG_RT_ALLOC
+static Graph* graph = 0;
+extern "C" {
+
+int alloc_allowed ()
+{
+ return !graph->in_process_thread ();
+}
+
+}
+#endif
Graph::Graph (Session & session)
: SessionHandleRef (session)
+ , _quit_threads (false)
+ , _execution_sem ("graph_execution", 0)
+ , _callback_start_sem ("graph_start", 0)
+ , _callback_done_sem ("graph_done", 0)
+ , _cleanup_sem ("graph_cleanup", 0)
{
pthread_mutex_init( &_trigger_mutex, NULL);
- sem_init( &_execution_sem, 0, 0 );
- sem_init( &_callback_start_sem, 0, 0 );
- sem_init( &_callback_done_sem, 0, 0 );
- sem_init( &_cleanup_sem, 0, 0 );
+ /* XXX: rather hacky `fix' to stop _trigger_queue.push_back() allocating
+ memory in the RT thread.
+ */
+ _trigger_queue.reserve (8192);
_execution_tokens = 0;
- pthread_mutex_init (&_swap_mutex, NULL);
_current_chain = 0;
_pending_chain = 0;
_setup_chain = 1;
_quit_threads = false;
_graph_empty = true;
+
+ reset_thread_list ();
+
+ Config->ParameterChanged.connect_same_thread (processor_usage_connection, boost::bind (&Graph::parameter_changed, this, _1));
+
+#ifdef DEBUG_RT_ALLOC
+ graph = this;
+ pbd_alloc_allowed = &::alloc_allowed;
+#endif
+}
+void
+Graph::parameter_changed (std::string param)
+{
+ if (param == X_("processor-usage")) {
+ reset_thread_list ();
+ }
+}
+
+void
+Graph::reset_thread_list ()
+{
int num_cpu = hardware_concurrency();
- int num_threads = num_cpu;
+ uint32_t num_threads = num_cpu;
int pu = Config->get_processor_usage ();
+ pthread_t a_thread;
+
+ Glib::Mutex::Lock lm (_session.engine().process_lock());
+
+ if (!_thread_list.empty()) {
+ drop_threads ();
+ }
if (pu < 0) {
/* pu is negative: use "pu" less cores for DSP than appear to be available
*/
- if (-pu < num_threads) {
+ if ((uint32_t) -pu < num_threads) {
num_threads += pu;
} else {
num_threads = 1;
} else {
/* use "pu" cores, if available
*/
-
- if (pu <= num_threads) {
+
+ if ((uint32_t) pu <= num_threads) {
num_threads = pu;
}
}
- info << string_compose (_("Using %2 threads on %1 CPUs"), num_cpu, num_threads) << endmsg;
+ if (AudioEngine::instance()->create_process_thread (boost::bind (&Graph::main_thread, this), &a_thread, 100000) == 0) {
+ _thread_list.push_back (a_thread);
+ }
- _thread_list.push_back (AudioEngine::instance()->create_process_thread (boost::bind (&Graph::main_thread, this), 100000));
-
- for (int i = 1; i < num_threads; ++i) {
- _thread_list.push_back (AudioEngine::instance()->create_process_thread (boost::bind (&Graph::helper_thread, this), 100000));
+ for (uint32_t i = 1; i < num_threads; ++i) {
+ if (AudioEngine::instance()->create_process_thread (boost::bind (&Graph::helper_thread, this), &a_thread, 100000) == 0) {
+ _thread_list.push_back (a_thread);
+ }
}
+
+ info << string_compose (_("Using %2 threads on %1 CPUs"), _thread_list.size(), num_threads) << endmsg;
+ cerr << string_compose (_("Using %2 threads on %1 CPUs"), _thread_list.size(), num_threads) << endl;
}
void
Graph::session_going_away()
+{
+ drop_threads ();
+
+ // now drop all references on the nodes.
+ _nodes_rt[0].clear();
+ _nodes_rt[1].clear();
+ _init_trigger_list[0].clear();
+ _init_trigger_list[1].clear();
+ _trigger_queue.clear();
+}
+
+void
+Graph::drop_threads ()
{
_quit_threads = true;
- for (unsigned int i=0; i<_thread_list.size(); i++) {
- sem_post( &_execution_sem);
+ for (unsigned int i=0; i< _thread_list.size(); i++) {
+ _execution_sem.signal ();
}
- sem_post( &_callback_start_sem);
+ _callback_start_sem.signal ();
- for (list<pthread_t>::iterator i = _thread_list.begin(); i != _thread_list.end(); i++) {
+ for (list<pthread_t>::iterator i = _thread_list.begin(); i != _thread_list.end(); ++i) {
void* status;
pthread_join (*i, &status);
}
- // now drop all references on the nodes.
- _nodes_rt[0].clear();
- _nodes_rt[1].clear();
- _init_trigger_list[0].clear();
- _init_trigger_list[1].clear();
- _trigger_queue.clear();
+ _thread_list.clear ();
+
+ _quit_threads = false;
}
void
Graph::clear_other_chain ()
{
+ Glib::Mutex::Lock ls (_swap_mutex);
+
while (1) {
- pthread_mutex_lock (&_swap_mutex);
if (_setup_chain != _pending_chain) {
for (node_list_t::iterator ni=_nodes_rt[_setup_chain].begin(); ni!=_nodes_rt[_setup_chain].end(); ni++) {
_nodes_rt[_setup_chain].clear ();
_init_trigger_list[_setup_chain].clear ();
- pthread_mutex_unlock (&_swap_mutex);
-
- return;
+ break;
}
- pthread_mutex_unlock (&_swap_mutex);
/* setup chain == pending chain - we have
to wait till this is no longer true.
*/
- cerr << "Wait for setup != pending (currently " << _setup_chain << '/' << _pending_chain << endl;
- int ret = sem_wait (&_cleanup_sem);
- cerr << " back from that wait, ret = " << ret << endl;
+ _cleanup_cond.wait (_swap_mutex);
}
}
node_list_t::iterator i;
int chain;
- if (pthread_mutex_trylock (&_swap_mutex) == 0) {
+ if (_swap_mutex.trylock()) {
// we got the swap mutex.
if (_current_chain != _pending_chain)
{
- printf ("chain swap ! %d -> %d\n", _current_chain, _pending_chain);
+ // printf ("chain swap ! %d -> %d\n", _current_chain, _pending_chain);
_setup_chain = _current_chain;
_current_chain = _pending_chain;
- printf ("\tNOW: setup %d current %d pending %d\n", _setup_chain, _current_chain, _pending_chain);
- sem_post (&_cleanup_sem);
+ _cleanup_cond.signal ();
}
- pthread_mutex_unlock (&_swap_mutex);
+ _swap_mutex.unlock ();
}
chain = _current_chain;
Graph::trigger (GraphNode* n)
{
pthread_mutex_lock (&_trigger_mutex);
- _trigger_queue.push_back( n);
+ _trigger_queue.push_back (n);
pthread_mutex_unlock (&_trigger_mutex);
}
void
Graph::restart_cycle()
{
- //printf( "cycle_done chain: %d\n", _current_chain);
-
// we are through. wakeup our caller.
+
again:
- sem_post( &_callback_done_sem);
+ _callback_done_sem.signal ();
// block until we are triggered.
- sem_wait( &_callback_start_sem);
- if (_quit_threads)
- return;
+ _callback_start_sem.wait();
- //printf( "cycle_start\n" );
+ if (_quit_threads) {
+ return;
+ }
this->prep();
- if (_graph_empty)
+
+ if (_graph_empty) {
goto again;
- //printf( "cycle_start chain: %d\n", _current_chain);
+ }
// returning will restart the cycle.
- // starting with waking up the others.
+ // starting with waking up the others.
}
static bool
Graph::rechain (boost::shared_ptr<RouteList> routelist)
{
node_list_t::iterator ni;
+ Glib::Mutex::Lock ls (_swap_mutex);
- pthread_mutex_lock (&_swap_mutex);
int chain = _setup_chain;
DEBUG_TRACE (DEBUG::Graph, string_compose ("============== setup %1\n", chain));
// set all refcounts to 0;
_pending_chain = chain;
dump(chain);
- pthread_mutex_unlock (&_swap_mutex);
}
-
bool
Graph::run_one()
{
to_run = 0;
}
- int wakeup = min ((int) _execution_tokens, (int) _trigger_queue.size());
+ int et = _execution_tokens;
+ int ts = _trigger_queue.size();
+
+ int wakeup = min (et, ts);
_execution_tokens -= wakeup;
- for (int i=0; i<wakeup; i++ ) {
- sem_post (&_execution_sem);
+ DEBUG_TRACE(DEBUG::ProcessThreads, string_compose ("%1 signals %2\n", pthread_self(), wakeup));
+
+ for (int i = 0; i < wakeup; i++) {
+ _execution_sem.signal ();
}
while (to_run == 0) {
_execution_tokens += 1;
pthread_mutex_unlock (&_trigger_mutex);
DEBUG_TRACE (DEBUG::ProcessThreads, string_compose ("%1 goes to sleep\n", pthread_self()));
- sem_wait (&_execution_sem);
- if (_quit_threads)
+ _execution_sem.wait ();
+ if (_quit_threads) {
return true;
+ }
DEBUG_TRACE (DEBUG::ProcessThreads, string_compose ("%1 is awake\n", pthread_self()));
pthread_mutex_lock (&_trigger_mutex);
if (_trigger_queue.size()) {
to_run->process();
to_run->finish (_current_chain);
+ DEBUG_TRACE(DEBUG::ProcessThreads, string_compose ("%1 has finished run_one()\n", pthread_self()));
+
return false;
}
void
Graph::helper_thread()
{
- ProcessThread *pt = new ProcessThread;
+ suspend_rt_malloc_checks ();
+ ProcessThread* pt = new ProcessThread ();
+ resume_rt_malloc_checks ();
pt->get_buffers();
get_rt();
void
Graph::main_thread()
{
- ProcessThread *pt = new ProcessThread;
+ suspend_rt_malloc_checks ();
+ ProcessThread* pt = new ProcessThread ();
+ resume_rt_malloc_checks ();
pt->get_buffers();
get_rt();
again:
- sem_wait (&_callback_start_sem);
+ _callback_start_sem.wait ();
+ DEBUG_TRACE(DEBUG::Graph, "main thread is awake\n");
+
+ if (_quit_threads) {
+ return;
+ }
this->prep();
- if (_graph_empty) {
- sem_post (&_callback_done_sem);
+ if (_graph_empty && !_quit_threads) {
+ _callback_done_sem.signal ();
+ DEBUG_TRACE(DEBUG::Graph, "main thread sees graph done, goes back to slee\n");
goto again;
}
while (1) {
+ DEBUG_TRACE(DEBUG::Graph, "main thread runs one graph node\n");
if (run_one()) {
break;
}
}
int
-Graph::silent_process_routes (nframes_t nframes, framepos_t start_frame, framepos_t end_frame,
+Graph::silent_process_routes (pframes_t nframes, framepos_t start_frame, framepos_t end_frame,
bool can_record, bool rec_monitors_input, bool& need_butler)
{
_process_nframes = nframes;
_process_need_butler = false;
if (!_graph_empty) {
- sem_post (&_callback_start_sem);
- sem_wait (&_callback_done_sem);
+ DEBUG_TRACE(DEBUG::Graph, "wake graph for silent process\n");
+ _callback_start_sem.signal ();
+ _callback_done_sem.wait ();
}
need_butler = _process_need_butler;
}
int
-Graph::process_routes (nframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick,
+Graph::process_routes (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick,
bool can_record, bool rec_monitors_input, bool& need_butler)
{
+ DEBUG_TRACE (DEBUG::Graph, string_compose ("graph execution from %1 to %2 = %3\n", start_frame, end_frame, nframes));
+
_process_nframes = nframes;
_process_start_frame = start_frame;
_process_end_frame = end_frame;
_process_retval = 0;
_process_need_butler = false;
- sem_post (&_callback_start_sem);
- sem_wait (&_callback_done_sem);
+ DEBUG_TRACE(DEBUG::Graph, "wake graph for non-silent process\n");
+ _callback_start_sem.signal ();
+ _callback_done_sem.wait ();
+
+ DEBUG_TRACE (DEBUG::Graph, "graph execution complete\n");
need_butler = _process_need_butler;
}
int
-Graph::routes_no_roll (nframes_t nframes, framepos_t start_frame, framepos_t end_frame,
+Graph::routes_no_roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame,
bool non_rt_pending, bool can_record, int declick)
{
+ DEBUG_TRACE (DEBUG::Graph, string_compose ("no-roll graph execution from %1 to %2 = %3\n", start_frame, end_frame, nframes));
+
_process_nframes = nframes;
_process_start_frame = start_frame;
_process_end_frame = end_frame;
_process_retval = 0;
_process_need_butler = false;
- sem_post (&_callback_start_sem);
- sem_wait (&_callback_done_sem);
+ DEBUG_TRACE(DEBUG::Graph, "wake graph for no-roll process\n");
+ _callback_start_sem.signal ();
+ _callback_done_sem.wait ();
return _process_retval;
}
}
}
+bool
+Graph::in_process_thread () const
+{
+ list<pthread_t>::const_iterator i = _thread_list.begin ();
+ while (i != _thread_list.end() && *i != pthread_self ()) {
+ ++i;
+ }
-
+ return i != _thread_list.end ();
+}
projects / ardour.git / blobdiff