#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)
{
pthread_mutex_init( &_trigger_mutex, NULL);
+ /* XXX: rather hacky `fix' to stop _trigger_queue.push_back() allocating
+ memory in the RT thread.
+ */
+ _trigger_queue.reserve (8192);
+
_execution_tokens = 0;
_current_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;
-
- pthread_t a_thread;
-
if (AudioEngine::instance()->create_process_thread (boost::bind (&Graph::main_thread, this), &a_thread, 100000) == 0) {
_thread_list.push_back (a_thread);
}
- for (int i = 1; i < num_threads; ++i) {
+ 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++) {
+ for (unsigned int i=0; i< _thread_list.size(); i++) {
_execution_sem.signal ();
}
_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::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:
_callback_done_sem.signal ();
// block until we are triggered.
_callback_start_sem.wait();
- if (_quit_threads)
- return;
- //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
int wakeup = min (et, ts);
_execution_tokens -= wakeup;
- for (int i=0; i<wakeup; i++ ) {
+ DEBUG_TRACE(DEBUG::ProcessThreads, string_compose ("%1 signals %2\n", pthread_self(), wakeup));
+
+ for (int i = 0; i < wakeup; i++) {
_execution_sem.signal ();
}
pthread_mutex_unlock (&_trigger_mutex);
DEBUG_TRACE (DEBUG::ProcessThreads, string_compose ("%1 goes to sleep\n", pthread_self()));
_execution_sem.wait ();
- if (_quit_threads)
+ 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:
_callback_start_sem.wait ();
DEBUG_TRACE(DEBUG::Graph, "main thread is awake\n");
+
+ if (_quit_threads) {
+ return;
+ }
+
this->prep();
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;
}
}
}
+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