From b204e830cffc41ecdd5035c0ecd060066e124bc1 Mon Sep 17 00:00:00 2001
From: "r.kuznetsov" <r.kuznetsov@corp.mail.ru>
Date: Mon, 15 May 2017 16:41:00 +0300
Subject: Limited reading threads count

---
 drape_frontend/backend_renderer.cpp |  2 +-
 drape_frontend/read_manager.cpp     | 11 +++--------
 drape_frontend/read_manager.hpp     |  4 ++--
 3 files changed, 6 insertions(+), 11 deletions(-)

diff --git a/drape_frontend/backend_renderer.cpp b/drape_frontend/backend_renderer.cpp
index 67a9e84e91..3b637db0c0 100644
--- a/drape_frontend/backend_renderer.cpp
+++ b/drape_frontend/backend_renderer.cpp
@@ -518,7 +518,7 @@ void BackendRenderer::Routine::Do()
 void BackendRenderer::InitGLDependentResource()
 {
   uint32_t constexpr kBatchSize = 5000;
-  m_batchersPool = make_unique_dp<BatchersPool<TileKey, TileKeyStrictComparator>>(ReadManager::ReadCount(),
+  m_batchersPool = make_unique_dp<BatchersPool<TileKey, TileKeyStrictComparator>>(kReadingThreadsCount,
                                                bind(&BackendRenderer::FlushGeometry, this, _1, _2, _3),
                                                kBatchSize, kBatchSize);
   m_trafficGenerator->Init();
diff --git a/drape_frontend/read_manager.cpp b/drape_frontend/read_manager.cpp
index 7d500ff7c7..35224da209 100755
--- a/drape_frontend/read_manager.cpp
+++ b/drape_frontend/read_manager.cpp
@@ -41,7 +41,8 @@ ReadManager::ReadManager(ref_ptr<ThreadsCommutator> commutator, MapDataProvider
                          bool allow3dBuildings, bool trafficEnabled)
   : m_commutator(commutator)
   , m_model(model)
-  , m_pool(make_unique_dp<threads::ThreadPool>(ReadCount(), bind(&ReadManager::OnTaskFinished, this, _1)))
+  , m_pool(make_unique_dp<threads::ThreadPool>(kReadingThreadsCount,
+                                               bind(&ReadManager::OnTaskFinished, this, _1)))
   , m_have3dBuildings(false)
   , m_allow3dBuildings(allow3dBuildings)
   , m_trafficEnabled(trafficEnabled)
@@ -49,8 +50,7 @@ ReadManager::ReadManager(ref_ptr<ThreadsCommutator> commutator, MapDataProvider
   , myPool(64, ReadMWMTaskFactory(m_model))
   , m_counter(0)
   , m_generationCounter(0)
-{
-}
+{}
 
 void ReadManager::OnTaskFinished(threads::IRoutine * task)
 {
@@ -188,11 +188,6 @@ bool ReadManager::CheckTileKey(TileKey const & tileKey) const
   return false;
 }
 
-uint32_t ReadManager::ReadCount()
-{
-  return max(static_cast<int>(GetPlatform().CpuCores()) - 2, 2);
-}
-
 bool ReadManager::MustDropAllTiles(ScreenBase const & screen) const
 {
   int const oldScale = df::GetDrawTileScale(m_currentViewport);
diff --git a/drape_frontend/read_manager.hpp b/drape_frontend/read_manager.hpp
index e8ced849fe..ed6b6e138b 100755
--- a/drape_frontend/read_manager.hpp
+++ b/drape_frontend/read_manager.hpp
@@ -26,6 +26,8 @@ namespace df
 class MapDataProvider;
 class CoverageUpdateDescriptor;
 
+uint8_t constexpr kReadingThreadsCount = 2;
+
 class ReadManager
 {
 public:
@@ -47,8 +49,6 @@ public:
   void RemoveCustomSymbols(MwmSet::MwmId const & mwmId, std::vector<FeatureID> & leftoverIds);
   void RemoveAllCustomSymbols();
 
-  static uint32_t ReadCount();
-
 private:
   void OnTaskFinished(threads::IRoutine * task);
   bool MustDropAllTiles(ScreenBase const & screen) const;
-- 
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