MOD Audio specific optimizations

Signed-off-by: falkTX <[email protected]>

common/JackClient.cpp

@@ -41,6 +41,37 @@ namespace Jack
 
 #define IsRealTime() ((fProcess != NULL) | (fThreadFun != NULL) | (fSync != NULL) | (fTimebase != NULL))
 
+/* Disables denormal numbers in floating point calculation. Denormal numbers
+ * happens often in IIR filters, and it can be very slow.
+ */
+/* Taken from cras/src/dsp/dsp_util.c in Chromium OS code.
+ * Copyright (c) 2013 The Chromium OS Authors. */
+static void dsp_enable_flush_denormal_to_zero()
+{
+#if defined(__i386__) || defined(__x86_64__)
+ unsigned int mxcsr;
+ mxcsr = __builtin_ia32_stmxcsr();
+ __builtin_ia32_ldmxcsr(mxcsr | 0x8040);
+#elif defined(__aarch64__)
+ uint64_t cw;
+ __asm__ __volatile__ (
+ "mrs %0, fpcr \n"
+ "orr %0, %0, #0x1000000 \n"
+ "msr fpcr, %0 \n"
+ "isb \n"
+ : "=r"(cw) :: "memory");
+#elif defined(__arm__)
+ uint32_t cw;
+ __asm__ __volatile__ (
+ "vmrs %0, fpscr \n"
+ "orr %0, %0, #0x1000000 \n"
+ "vmsr fpscr, %0 \n"
+ : "=r"(cw) :: "memory");
+#else
+#warning "Don't know how to disable denorms. Performace may suffer."
+#endif
+}
+
 JackClient::JackClient(JackSynchro* table):fThread(this)
 {
  fSynchroTable = table;

common/JackEngine.cpp

@@ -40,6 +40,12 @@ extern const char* JACK_METADATA_PRETTY_NAME;
 namespace Jack
 {
 
+static bool areFutexesOptimizedForInternalClients()
+{
+ static bool ret = (getenv("JACK_NO_OPTIMIZATIONS") == NULL);
+ return ret;
+}
+
 JackEngine::JackEngine(JackGraphManager* manager,
  JackSynchro* table,
  JackEngineControl* control,
@@ -635,7 +641,7 @@ int JackEngine::ClientExternalOpen(const char* name, int pid, jack_uuid_t uuid,
 
  JackExternalClient* client = new JackExternalClient();
 
- if (!fSynchroTable[refnum].Allocate(real_name, fEngineControl->fServerName, 0)) {
+ if (!fSynchroTable[refnum].Allocate(real_name, fEngineControl->fServerName, 0, false)) {
  jack_error("Cannot allocate synchro");
  goto error;
  }
@@ -685,7 +691,7 @@ int JackEngine::ClientInternalOpen(const char* name, int* ref, JackEngineControl
  goto error;
  }
 
- if (!fSynchroTable[refnum].Allocate(name, fEngineControl->fServerName, 0)) {
+ if (!fSynchroTable[refnum].Allocate(name, fEngineControl->fServerName, 0, areFutexesOptimizedForInternalClients())) {
  jack_error("Cannot allocate synchro");
  goto error;
  }

common/JackMidiAsyncWaitQueue.cpp

@@ -25,11 +25,17 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 using Jack::JackMidiAsyncWaitQueue;
 
+static bool areFutexesOptimizedForInternalClients()
+{
+ static bool ret = (getenv("JACK_NO_OPTIMIZATIONS") == NULL);
+ return ret;
+}
+
 JackMidiAsyncWaitQueue::JackMidiAsyncWaitQueue(size_t max_bytes,
  size_t max_messages):
  JackMidiAsyncQueue(max_bytes, max_messages)
 {
- if (semaphore.Allocate("JackMidiAsyncWaitQueue", "midi-thread", 0)) {
+ if (semaphore.Allocate("JackMidiAsyncWaitQueue", "midi-thread", 0, areFutexesOptimizedForInternalClients())) {
  throw std::bad_alloc();
  }
 }

linux/JackLinuxFutex.cpp

@@ -48,11 +48,15 @@ void JackLinuxFutex::BuildName(const char* client_name, const char* server_name,
 {
  char ext_client_name[SYNC_MAX_NAME_SIZE + 1];
  JackTools::RewriteName(client_name, ext_client_name);
+#ifdef __MOD_DEVICES__
+ snprintf(res, size, "jack_sem.%s", ext_client_name);
+#else
  if (fPromiscuous) {
  snprintf(res, size, "jack_sem.%s_%s", server_name, ext_client_name);
  } else {
  snprintf(res, size, "jack_sem.%d_%s_%s", JackTools::GetUID(), server_name, ext_client_name);
  }
+#endif
 }
 
 bool JackLinuxFutex::Signal()
@@ -78,7 +82,17 @@ bool JackLinuxFutex::Signal()
 
 bool JackLinuxFutex::SignalAll()
 {
- return Signal();
+ if (!fFutex) {
+ jack_error("JackLinuxFutex::Signal name = %s already deallocated!!", fName);
+ return false;
+ }
+
+ if (fFlush) {
+ return true;
+ }
+
+ ::syscall(SYS_futex, fFutex, fFutex->internal ? FUTEX_WAKE_PRIVATE : FUTEX_WAKE, INT32_MAX, NULL, NULL, 0);
+ return true;
 }
 
 bool JackLinuxFutex::Wait()

linux/JackLinuxFutex.h

@@ -69,7 +69,7 @@ class SERVER_EXPORT JackLinuxFutex : public detail::JackSynchro
  bool Wait();
  bool TimedWait(long usec);
 
- bool Allocate(const char* name, const char* server_name, int value, bool internal = false);
+ bool Allocate(const char* name, const char* server_name, int value, bool internal);
  bool Connect(const char* name, const char* server_name);
  bool ConnectInput(const char* name, const char* server_name);
  bool ConnectOutput(const char* name, const char* server_name);