Added possibility to configure TBB behavior in Perf tests --- now we can set...

Added possibility to configure TBB behavior in Perf tests --- now we can set the number of TBB threads in the perf tests either as console parameter perf_tbb_nthreads or 
in a test itself using the method declare.tbb_threads(n).

CMakeLists.txt

@@ -925,7 +925,7 @@ if (WITH_TBB)
             if (APPLE)
                 set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} libtbb.dylib)
             elseif (ANDROID)
-                set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} tbbmalloc tbb)
+                set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS}  tbb)
                 add_definitions(-DTBB_USE_GCC_BUILTINS)
             elseif (UNIX)
                 set(OPENCV_LINKER_LIBS ${OPENCV_LINKER_LIBS} tbb)

modules/ts/include/opencv2/ts/ts_perf.hpp

@@ -4,6 +4,10 @@
 #include "opencv2/core/core.hpp"
 #include "ts_gtest.h"
 
+#ifdef HAVE_TBB
+#include "tbb/task_scheduler_init.h"
+#endif
+
 #if defined(ANDROID) && defined(USE_ANDROID_LOGGING)
 #include <android/log.h>
 
@@ -283,6 +287,7 @@ private:
 
         _declareHelper& iterations(int n);
         _declareHelper& time(double timeLimitSecs);
+        _declareHelper& tbb_threads(int n);
     private:
         TestBase* test;
         _declareHelper(TestBase* t);
@@ -292,6 +297,10 @@ private:
     };
     friend class _declareHelper;
 
+#ifdef HAVE_TBB
+    cv::Ptr<tbb::task_scheduler_init> p_tbb_initializer;
+#endif
+
 public:
     _declareHelper declare;
 };

modules/ts/src/ts_perf.cpp

@@ -385,6 +385,7 @@ const char *command_line_keys =
     "{   |perf_max_outliers   |8        |percent of allowed outliers}"
     "{   |perf_min_samples    |10       |minimal required numer of samples}"
     "{   |perf_seed           |809564   |seed for random numbers generator}"
+    "{   |perf_tbb_nthreads   |-1       |if TBB is enabled, the number of TBB threads}"
     #if ANDROID
     "{   |perf_time_limit     |6.0      |default time limit for a single test (in seconds)}"
     "{   |perf_affinity_mask  |0        |set affinity mask for the main thread}"
@@ -400,6 +401,7 @@ double       param_max_deviation;
 unsigned int param_min_samples;
 uint64       param_seed;
 double       param_time_limit;
+int          param_tbb_nthreads;
 #if ANDROID
 int          param_affinity_mask;
 
@@ -427,6 +429,8 @@ void TestBase::Init(int argc, const char* const argv[])
     param_max_deviation = std::max(0., args.get<double>("perf_max_deviation"));
     param_seed = args.get<uint64>("perf_seed");
     param_time_limit = std::max(0., args.get<double>("perf_time_limit"));
+
+    param_tbb_nthreads  = args.get<int>("perf_tbb_nthreads");
 #if ANDROID
     param_affinity_mask = args.get<int>("perf_affinity_mask");
 #endif
@@ -769,6 +773,12 @@ void TestBase::reportMetrics(bool toJUnitXML)
 
 void TestBase::SetUp()
 {
+#ifdef HAVE_TBB
+    if (param_tbb_nthreads > 0) {
+        p_tbb_initializer.release();
+        p_tbb_initializer=new tbb::task_scheduler_init(param_tbb_nthreads);
+    }
+#endif
 #if ANDROID
     if (param_affinity_mask)
         setCurrentThreadAffinityMask(param_affinity_mask);
@@ -796,6 +806,9 @@ void TestBase::TearDown()
         if (type_param)  printf("[ TYPE     ] \t%s\n", type_param), fflush(stdout);
         reportMetrics(true);
     }
+#ifdef HAVE_TBB
+    p_tbb_initializer.release();
+#endif
 }
 
 std::string TestBase::getDataPath(const std::string& relativePath)
@@ -882,6 +895,17 @@ TestBase::_declareHelper& TestBase::_declareHelper::time(double timeLimitSecs)
     return *this;
 }
 
+TestBase::_declareHelper& TestBase::_declareHelper::tbb_threads(int n)
+{
+#ifdef HAVE_TBB
+    if (n > 0) {
+        test->p_tbb_initializer.release();
+        test->p_tbb_initializer=new tbb::task_scheduler_init(n);
+    }
+#endif
+    return *this;
+}
+
 TestBase::_declareHelper& TestBase::_declareHelper::in(cv::InputOutputArray a1, int wtype)
 {
     if (!test->times.empty()) return *this;