diff --git a/sdk/xtdk/amd64/hlfuncs.h b/sdk/xtdk/amd64/hlfuncs.h
index 0fd872c..443623b 100644
--- a/sdk/xtdk/amd64/hlfuncs.h
+++ b/sdk/xtdk/amd64/hlfuncs.h
@@ -69,6 +69,10 @@ XTCDECL
 ULONGLONG
 HlReadModelSpecificRegister(IN ULONG Register);
 
+XTCDECL
+ULONGLONG
+HlReadTimeStampCounter();
+
 XTCDECL
 VOID
 HlSetInterruptFlag();
diff --git a/sdk/xtdk/i686/hlfuncs.h b/sdk/xtdk/i686/hlfuncs.h
index cf6137d..00ba7ae 100644
--- a/sdk/xtdk/i686/hlfuncs.h
+++ b/sdk/xtdk/i686/hlfuncs.h
@@ -69,6 +69,10 @@ XTCDECL
 ULONGLONG
 HlReadModelSpecificRegister(IN ULONG Register);
 
+XTCDECL
+ULONGLONG
+HlReadTimeStampCounter();
+
 XTCDECL
 VOID
 HlSetInterruptFlag();
diff --git a/xtoskrnl/hl/amd64/cpufunc.c b/xtoskrnl/hl/amd64/cpufunc.c
index 1197ebc..fd11ef8 100644
--- a/xtoskrnl/hl/amd64/cpufunc.c
+++ b/xtoskrnl/hl/amd64/cpufunc.c
@@ -321,6 +321,26 @@ HlReadModelSpecificRegister(IN ULONG Register)
     return ((ULONGLONG)High << 32) | Low;
 }
 
+/**
+ * Reads the current value of the CPU's time-stamp counter.
+ *
+ * @return This routine returns the current instruction cycle count since the processor was started.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+ULONGLONG
+HlReadTimeStampCounter()
+{
+    ULONGLONG Low, High;
+
+    asm volatile("rdtsc"
+                 :"=a"(Low),
+                 "=d"(High));
+
+    return ((ULONGLONG)High << 32) | Low;
+}
+
 /**
  * Instructs the processor to set the interrupt flag.
  *
diff --git a/xtoskrnl/hl/i686/cpufunc.c b/xtoskrnl/hl/i686/cpufunc.c
index 4f45ee8..2320f42 100644
--- a/xtoskrnl/hl/i686/cpufunc.c
+++ b/xtoskrnl/hl/i686/cpufunc.c
@@ -313,6 +313,25 @@ HlReadModelSpecificRegister(IN ULONG Register)
     return Value;
 }
 
+/**
+ * Reads the current value of the CPU's time-stamp counter.
+ *
+ * @return This routine returns the current instruction cycle count since the processor was started.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+ULONGLONG
+HlReadTimeStampCounter()
+{
+    ULONGLONG Value;
+
+    asm volatile("rdtsc"
+                 : "=A"(Value));
+
+    return Value;
+}
+
 /**
  * Instructs the processor to set the interrupt flag.
  *