dataflow_cpp: query maximum number of queues for sequential processes in…

dataflow_cpp: query maximum number of queues for sequential processes in addition to the core count and use the minimum

dataflow_cpp/include/embb/dataflow/internal/scheduler_mtapi.h

@@ -32,6 +32,8 @@
 #include <embb/tasks/node.h>
 #include <embb/base/function.h>
 
+#include <algorithm>
+
 namespace embb {
 namespace dataflow {
 namespace internal {
@@ -46,7 +48,9 @@ class SchedulerMTAPI : public Scheduler {
       group_[ii] = &group;
     }
 
-    queue_count_ = static_cast<int>(node.GetWorkerThreadCount());
+    queue_count_ = std::min(
+      static_cast<int>(node.GetQueueCount()),
+      static_cast<int>(node.GetWorkerThreadCount()) );
     queue_ = reinterpret_cast<embb::tasks::Queue**>(
       embb::base::Allocation::Allocate(
       sizeof(embb::tasks::Queue*)*queue_count_));

dataflow_cpp/test/dataflow_cpp_test_simple.cc

@@ -156,7 +156,7 @@ void SimpleTest::TestBasic() {
     core_set,
     1024, // max tasks (default: 1024)
     128,  // max groups (default: 128)
-    num_cores, // max queues (default: 16)
+    2, // max queues (default: 16)
     1024, // queue capacity (default: 1024)
     4);   // num priorities (default: 4)