[tests] Added SleeptoAccuracy (disabled)

test/filelist.maf

@@ -2,6 +2,7 @@
 SOURCES
 test_buffer.cpp
 test_connection_timeout.cpp
+test_epoll.cpp
 test_seqno.cpp
 test_strict_encription.cpp
-test_epoll.cpp
+test_timer.cpp

test/test_timer.cpp

@@ -0,0 +1,47 @@
+#include "gtest/gtest.h"
+#include <chrono>
+#include <thread>
+#include <array>
+#include <numeric>   // std::accumulate
+#include "common.h"
+
+
+
+
+TEST(CTimer, DISABLED_SleeptoAccuracy)
+{
+    using namespace std;
+
+    const int num_samples = 1000;
+    array<uint64_t, num_samples> sleeps_us;
+
+    const uint64_t freq = CTimer::getCPUFrequency();
+    std::cerr << "CPU Frequency: " << freq << "\n";
+
+    const uint64_t sleep_intervals_us[] = { 1, 5, 10, 50, 100, 250, 500, 1000, 5000, 10000 };
+
+    CTimer timer;
+
+    for (uint64_t interval_us : sleep_intervals_us)
+    {
+        for (int i = 0; i < num_samples; i++)
+        {
+            uint64_t currtime;
+            CTimer::rdtsc(currtime);
+
+            timer.sleepto(currtime + interval_us * freq);
+
+            uint64_t new_time;
+            CTimer::rdtsc(new_time);
+            sleeps_us[i] = (new_time - currtime) / freq;
+        }
+
+        cerr << "Target sleep duration: " << interval_us << " us\n";
+        cerr << "avg sleep duration: " << accumulate(sleeps_us.begin(), sleeps_us.end(), (uint64_t) 0) / num_samples << " us\n";
+        cerr << "min sleep duration: " << *min_element(sleeps_us.begin(), sleeps_us.end()) << " us\n";
+        cerr << "max sleep duration: " << *max_element(sleeps_us.begin(), sleeps_us.end()) << " us\n";
+        cerr << "\n";
+    }
+}
+
+