From 84ae60a3b34d92930a74e9207bf39e6335e307a0 Mon Sep 17 00:00:00 2001
From: Mnikolenko Productengine <mnikolenko@productengine.com>
Date: Fri, 16 Jul 2021 16:32:12 +0300
Subject: SL-15581 Add the function to get median FPS

---
 indra/llcommon/lltracerecording.h      | 25 +++++++++++++++++++++++++
 indra/newview/llfloaterperformance.cpp |  2 +-
 2 files changed, 26 insertions(+), 1 deletion(-)

(limited to 'indra')

diff --git a/indra/llcommon/lltracerecording.h b/indra/llcommon/lltracerecording.h
index d0b4a842a6..2af5273d70 100644
--- a/indra/llcommon/lltracerecording.h
+++ b/indra/llcommon/lltracerecording.h
@@ -580,6 +580,31 @@ namespace LLTrace
 			return typename RelatedTypes<T>::fractional_t(getPeriodMeanPerSec(static_cast<const StatType<CountAccumulator>&>(stat), num_periods));
 		}
 
+        template <typename T>
+        typename RelatedTypes<typename T::value_t>::fractional_t getPeriodMedianPerSec(const StatType<T>& stat, S32 num_periods = S32_MAX)
+        {
+            num_periods = llmin(num_periods, getNumRecordedPeriods());
+
+            std::vector <typename RelatedTypes<typename T::value_t>::fractional_t> buf;
+            for (S32 i = 1; i <= num_periods; i++)
+            {
+                Recording& recording = getPrevRecording(i);
+                if (recording.getDuration() > (F32Seconds)0.f)
+                {
+                    buf.push_back(recording.getPerSec(stat));
+                }
+            }
+            std::sort(buf.begin(), buf.end());
+
+            return typename RelatedTypes<T>::fractional_t((buf.size() % 2 == 0) ? (buf[buf.size() / 2 - 1] + buf[buf.size() / 2]) / 2 : buf[buf.size() / 2]);
+        }
+
+        template<typename T>
+        typename RelatedTypes<T>::fractional_t getPeriodMedianPerSec(const CountStatHandle<T>& stat, S32 num_periods = S32_MAX)
+        {
+            return typename RelatedTypes<T>::fractional_t(getPeriodMedianPerSec(static_cast<const StatType<CountAccumulator>&>(stat), num_periods));
+        }
+
 		//
 		// PERIODIC STANDARD DEVIATION
 		//
diff --git a/indra/newview/llfloaterperformance.cpp b/indra/newview/llfloaterperformance.cpp
index a2fb8c130d..879a8f8718 100644
--- a/indra/newview/llfloaterperformance.cpp
+++ b/indra/newview/llfloaterperformance.cpp
@@ -156,7 +156,7 @@ void LLFloaterPerformance::draw()
 
     if (mUpdateTimer->hasExpired())
     {
-        getChild<LLTextBox>("fps_value")->setValue((S32)llround(LLTrace::get_frame_recording().getPeriodMeanPerSec(LLStatViewer::FPS, NUM_PERIODS)));
+        getChild<LLTextBox>("fps_value")->setValue((S32)llround(LLTrace::get_frame_recording().getPeriodMedianPerSec(LLStatViewer::FPS, NUM_PERIODS)));
         if (mHUDsPanel->getVisible())
         {
             populateHUDList();
-- 
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