From dcd13a7566340e80c042da7f626f9747ac71b8a7 Mon Sep 17 00:00:00 2001
From: Morph <39850852+Morph1984@users.noreply.github.com>
Date: Sat, 4 Mar 2023 21:44:31 -0500
Subject: native_clock: Re-adjust the RDTSC frequency

The RDTSC frequency reported by CPUID is not accurate to its true frequency.
We will spawn a separate thread to calculate the true RDTSC frequency after a measurement period of 30 seconds has elapsed.
---
 src/common/x64/native_clock.h | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/common/x64/native_clock.h')

diff --git a/src/common/x64/native_clock.h b/src/common/x64/native_clock.h
index 38ae7a462..03ca291d8 100644
--- a/src/common/x64/native_clock.h
+++ b/src/common/x64/native_clock.h
@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include "common/polyfill_thread.h"
 #include "common/wall_clock.h"
 
 namespace Common {
@@ -28,6 +29,8 @@ public:
 private:
     u64 GetRTSC();
 
+    void CalculateAndSetFactors();
+
     union alignas(16) TimePoint {
         TimePoint() : pack{} {}
         u128 pack{};
@@ -47,6 +50,8 @@ private:
     u64 ms_rtsc_factor{};
 
     u64 rtsc_frequency;
+
+    std::jthread time_sync_thread;
 };
 } // namespace X64
 
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