tkonolige commented on a change in pull request #7472: URL: https://github.com/apache/tvm/pull/7472#discussion_r580586525
########## File path: python/tvm/runtime/profiling.py ########## @@ -0,0 +1,57 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you 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. +"""Runtime profiling functions.""" +import tvm._ffi + + +def start_timer(ctx): + """ + Start a low-overhead device specific timer. + + Params + ------ + ctx: TVMContext + The context to get a timer for. + + Returns + ------- + timer_start: function + A function that stops the device specific timer. Calling this function + stops the timer and returns another function that returns the elapsed + time in nanoseconds. This third function should be called as late as Review comment: You get a negative duration (int64_t is signed). Right now I'm using high_resolution_clock which maybe not be monotonic. We could switch to steady clock, but it maybe not be as high resolution. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
