[opencv] 200/251: ts(perf): initialize ThreadPool

[Nobuhiro Iwamatsu]

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iwamatsu pushed a commit to annotated tag 3.3.0
in repository opencv.

commit 50b9a5afa94612284490e01333a1b3d5bc9b55f4
Author: Alexander Alekhin <alexander.alekhin at intel.com>
Date:   Mon Jul 31 16:22:06 2017 +0300

    ts(perf): initialize ThreadPool
---
 modules/ts/src/ts_perf.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/modules/ts/src/ts_perf.cpp b/modules/ts/src/ts_perf.cpp
index a09ba1a..7fbf2c7 100644
--- a/modules/ts/src/ts_perf.cpp
+++ b/modules/ts/src/ts_perf.cpp
@@ -1212,6 +1212,18 @@ int64 TestBase::_calibrate()
         }
     };
 
+    // Initialize ThreadPool
+    class _dummyParallel : public ParallelLoopBody
+    {
+    public:
+       void operator()(const cv::Range& range) const
+       {
+           // nothing
+           CV_UNUSED(range);
+       }
+    };
+    parallel_for_(cv::Range(0, 1000), _dummyParallel());
+
     _timeadjustment = 0;
     _helper h;
     h.PerfTestBody();
@@ -1838,6 +1850,8 @@ void TestBase::SetUp()
 
     if (param_threads >= 0)
         cv::setNumThreads(param_threads);
+    else
+        cv::setNumThreads(-1);
 
 #ifdef __ANDROID__
     if (param_affinity_mask)

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