From 96a2f80bf28a7ad8b7c8973b581f67bc2c143640 Mon Sep 17 00:00:00 2001
From: Dmitry Kurtaev <dmitry.kurtaev+github@gmail.com>
Date: Mon, 24 Jun 2019 22:41:30 +0300
Subject: [PATCH] Limit number of threads in CPU plugin of IE by OpenCV's
 getNumThreads

---
 modules/dnn/src/op_inf_engine.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/modules/dnn/src/op_inf_engine.cpp b/modules/dnn/src/op_inf_engine.cpp
index 3f96a1db37..ab9bdc38fe 100644
--- a/modules/dnn/src/op_inf_engine.cpp
+++ b/modules/dnn/src/op_inf_engine.cpp
@@ -460,6 +460,12 @@ void InfEngineBackendNet::initPlugin(InferenceEngine::ICNNNetwork& net)
                 CV_LOG_WARNING(NULL, "DNN-IE: Can't load extension plugin (extra layers for some networks). Specify path via OPENCV_DNN_IE_EXTRA_PLUGIN_PATH parameter");
             }
             // Some of networks can work without a library of extra layers.
+#ifndef _WIN32
+            // Limit the number of CPU threads.
+            enginePtr->SetConfig({{
+                InferenceEngine::PluginConfigParams::KEY_CPU_THREADS_NUM, format("%d", getNumThreads()),
+            }}, 0);
+#endif
         }
         plugin = InferenceEngine::InferencePlugin(enginePtr);