Support performance tests

Support performance tests while direct tests commands keep unchanged.
To build performance tests, run "make build_perf".
To run all performance testis, run "make perf".
To run specific tests, for example, run
/usr/bin/ctest -C performance -R performance_tests/perfDispatch --verbose
To run individual test, for example, run
performance_tests/memory/hipPerfMemMallocCpyFree

Change-Id: I168c1b9ef1ec21b392d48648d0c71e8fbd37d57b

perftests/perfDispatch/timer.cpp

@@ -0,0 +1,116 @@
+#include "timer.h"
+
+#include <stdlib.h>
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#define VC_EXTRALEAN
+#include <windows.h>
+#pragma comment(lib, "user32")
+#endif
+
+#ifdef __linux__
+#include <time.h>
+#define NANOSECONDS_PER_SEC 1000000000
+#endif
+
+CPerfCounter::CPerfCounter() : _clocks(0), _start(0)
+{
+
+#ifdef _WIN32
+
+    QueryPerformanceFrequency((LARGE_INTEGER *)&_freq);
+
+#endif
+
+#ifdef __linux__
+    _freq = NANOSECONDS_PER_SEC;
+#endif
+
+}
+
+CPerfCounter::~CPerfCounter()
+{
+    // EMPTY!
+}
+
+void
+CPerfCounter::Start(void)
+{
+
+#ifdef _WIN32
+
+    if( _start )
+    {
+        MessageBox(NULL, "Bad Perf Counter Start", "Error", MB_OK);
+        exit(0);
+    }
+    QueryPerformanceCounter((LARGE_INTEGER *)&_start);
+
+#endif
+#ifdef __linux__
+
+    struct timespec s;
+    clock_gettime(CLOCK_MONOTONIC, &s);
+    _start = (i64)s.tv_sec * NANOSECONDS_PER_SEC + (i64)s.tv_nsec ;
+
+#endif
+
+}
+
+void
+CPerfCounter::Stop(void)
+{
+    i64 n;
+
+#ifdef _WIN32
+
+    if( !_start )
+    {
+        MessageBox(NULL, "Bad Perf Counter Stop", "Error", MB_OK);
+        exit(0);
+    }
+
+    QueryPerformanceCounter((LARGE_INTEGER *)&n);
+
+#endif
+#ifdef __linux__
+
+    struct timespec s;
+    clock_gettime(CLOCK_MONOTONIC, &s);
+    n = (i64)s.tv_sec * NANOSECONDS_PER_SEC + (i64)s.tv_nsec ;
+
+#endif
+
+    n -= _start;
+    _start = 0;
+    _clocks += n;
+}
+
+void
+CPerfCounter::Reset(void)
+{
+
+#ifdef _WIN32
+    if( _start )
+    {
+        MessageBox(NULL, "Bad Perf Counter Reset", "Error", MB_OK);
+        exit(0);
+    }
+#endif
+    _clocks = 0;
+}
+
+double
+CPerfCounter::GetElapsedTime(void)
+{
+#ifdef _WIN32
+    if( _start ) {
+        MessageBox(NULL, "Trying to get time while still running.", "Error", MB_OK);
+        exit(0);
+    }
+#endif
+
+    return (double)_clocks / (double)_freq;
+
+}