49 lines
1.8 KiB
C++
49 lines
1.8 KiB
C++
/* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
==============================================================================*/
|
|
|
|
#include "tensorflow/lite/micro/micro_time.h"
|
|
|
|
#include "tensorflow/lite/micro/testing/micro_test.h"
|
|
|
|
TF_LITE_MICRO_TESTS_BEGIN
|
|
|
|
TF_LITE_MICRO_TEST(TestBasicTimerFunctionality) {
|
|
int32_t ticks_per_second = tflite::ticks_per_second();
|
|
|
|
// Retry enough times to guarantee a tick advance, while not taking too long
|
|
// to complete. With 1e6 retries, assuming each loop takes tens of cycles,
|
|
// this will retry for less than 10 seconds on a 10MHz platform.
|
|
constexpr int kMaxRetries = 1e6;
|
|
int start_time = tflite::GetCurrentTimeTicks();
|
|
|
|
if (ticks_per_second != 0) {
|
|
for (int i = 0; i < kMaxRetries; i++) {
|
|
if (tflite::GetCurrentTimeTicks() - start_time > 0) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Ensure the timer is increasing. This works for the overflow case too, since
|
|
// (MIN_INT + x) - (MAX_INT - y) == x + y + 1. For example,
|
|
// 0x80000001(min int + 1) - 0x7FFFFFFE(max int - 1) = 0x00000003 == 3.
|
|
// GetTicksPerSecond() == 0 means the timer is not implemented on this
|
|
// platform.
|
|
TF_LITE_MICRO_EXPECT(ticks_per_second == 0 ||
|
|
tflite::GetCurrentTimeTicks() - start_time > 0);
|
|
}
|
|
|
|
TF_LITE_MICRO_TESTS_END
|