mirror of
https://github.com/saymrwulf/onnxruntime.git
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c5f3952b68
This is to leverage console.timeStamp to add a single marker to browsers' (only Chromium and Firefox support it) performance tool. With this support, we can dump both CPU and GPU timestamps, and use post-processing tool to clearly understand the calibrated timeline. A demo tool can be found at https://github.com/webatintel/ort-test, and more detailed info can be found at https://docs.google.com/document/d/1TuVxjE8jnELBXdhI4QGFgMnUqQn6Q53QA9y4a_dH688/edit.
68 lines
2.5 KiB
TypeScript
68 lines
2.5 KiB
TypeScript
// Copyright (c) Microsoft Corporation. All rights reserved.
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// Licensed under the MIT License.
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import {cpus} from 'node:os';
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import {Backend, env, InferenceSession, InferenceSessionHandler} from 'onnxruntime-common';
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import {initializeOrtEp, initializeWebAssemblyAndOrtRuntime} from './wasm/proxy-wrapper';
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import {OnnxruntimeWebAssemblySessionHandler} from './wasm/session-handler-inference';
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/**
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* This function initializes all flags for WebAssembly.
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*
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* Those flags are accessible from `ort.env.wasm`. Users are allow to set those flags before the first inference session
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* being created, to override default value.
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*/
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export const initializeFlags = (): void => {
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if (typeof env.wasm.initTimeout !== 'number' || env.wasm.initTimeout < 0) {
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env.wasm.initTimeout = 0;
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}
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if (typeof env.wasm.simd !== 'boolean') {
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env.wasm.simd = true;
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}
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if (typeof env.wasm.proxy !== 'boolean') {
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env.wasm.proxy = false;
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}
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if (typeof env.wasm.trace !== 'boolean') {
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env.wasm.trace = false;
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}
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if (typeof env.wasm.numThreads !== 'number' || !Number.isInteger(env.wasm.numThreads) || env.wasm.numThreads <= 0) {
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const numCpuLogicalCores = typeof navigator === 'undefined' ? cpus().length : navigator.hardwareConcurrency;
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env.wasm.numThreads = Math.min(4, Math.ceil((numCpuLogicalCores || 1) / 2));
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}
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};
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export class OnnxruntimeWebAssemblyBackend implements Backend {
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/**
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* This function initializes the WebAssembly backend.
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*
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* This function will be called only once for each backend name. It will be called the first time when
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* `ort.InferenceSession.create()` is called with a registered backend name.
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*
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* @param backendName - the registered backend name.
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*/
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async init(backendName: string): Promise<void> {
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// populate wasm flags
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initializeFlags();
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// init wasm
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await initializeWebAssemblyAndOrtRuntime();
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// performe EP specific initialization
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await initializeOrtEp(backendName);
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}
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createInferenceSessionHandler(path: string, options?: InferenceSession.SessionOptions):
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Promise<InferenceSessionHandler>;
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createInferenceSessionHandler(buffer: Uint8Array, options?: InferenceSession.SessionOptions):
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Promise<InferenceSessionHandler>;
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async createInferenceSessionHandler(pathOrBuffer: string|Uint8Array, options?: InferenceSession.SessionOptions):
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Promise<InferenceSessionHandler> {
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const handler = new OnnxruntimeWebAssemblySessionHandler();
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await handler.loadModel(pathOrBuffer, options);
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return Promise.resolve(handler);
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}
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}
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