1 /* 2 * Copyright (c) Meta Platforms, Inc. and affiliates. 3 * All rights reserved. 4 * 5 * This source code is licensed under the BSD-style license found in the 6 * LICENSE file in the root directory of this source tree. 7 */ 8 9 /** 10 * @file 11 * Clock and timing related methods. 12 */ 13 14 #pragma once 15 16 #include <executorch/runtime/platform/platform.h> 17 18 namespace executorch { 19 namespace runtime { 20 21 /** 22 * Convert an interval from units of system ticks to nanoseconds. 23 * The conversion ratio is platform-dependent, and thus depends on 24 * the platform implementation of et_pal_ticks_to_ns_multiplier(). 25 * 26 * @param[in] ticks The interval length in system ticks. 27 * @retval The interval length in nanoseconds. 28 */ ticks_to_ns(et_timestamp_t ticks)29inline uint64_t ticks_to_ns(et_timestamp_t ticks) { 30 et_tick_ratio_t ratio = et_pal_ticks_to_ns_multiplier(); 31 return static_cast<uint64_t>(ticks) * ratio.numerator / ratio.denominator; 32 } 33 34 } // namespace runtime 35 } // namespace executorch 36 37 namespace torch { 38 namespace executor { 39 // TODO(T197294990): Remove these deprecated aliases once all users have moved 40 // to the new `::executorch` namespaces. 41 using ::executorch::runtime::ticks_to_ns; 42 } // namespace executor 43 } // namespace torch 44