ui/src/tracks/process_summary/process_scheduling_track.ts - third_party/perfetto - Git at Google

 // Copyright (C) 2023 The Android Open Source Project
 //
 // 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.

 import {BigintMath as BIMath} from '../../base/bigint_math';
 import {searchEq, searchRange} from '../../base/binary_search';
 import {assertExists, assertTrue} from '../../base/logging';
 import {duration, time, Time} from '../../base/time';
 import {Actions} from '../../common/actions';
 import {drawTrackHoverTooltip} from '../../common/canvas_utils';
 import {Color} from '../../core/color';
 import {colorForThread} from '../../core/colorizer';
 import {TrackData} from '../../common/track_data';
 import {TimelineFetcher} from '../../common/track_helper';
 import {checkerboardExcept} from '../../frontend/checkerboard';
 import {globals} from '../../frontend/globals';
 import {PanelSize} from '../../frontend/panel';
 import {EngineProxy, Track} from '../../public';
 import {LONG, NUM, QueryResult} from '../../trace_processor/query_result';
 import {uuidv4Sql} from '../../base/uuid';

 export const PROCESS_SCHEDULING_TRACK_KIND = 'ProcessSchedulingTrack';

 const MARGIN_TOP = 5;
 const RECT_HEIGHT = 30;
 const TRACK_HEIGHT = MARGIN_TOP * 2 + RECT_HEIGHT;

 interface Data extends TrackData {
   kind: 'slice';
   maxCpu: number;

   // Slices are stored in a columnar fashion. All fields have the same length.
   starts: BigInt64Array;
   ends: BigInt64Array;
   utids: Uint32Array;
   cpus: Uint32Array;
 }

 export interface Config {
   pidForColor: number;
   upid: number | null;
   utid: number | null;
 }

 export class ProcessSchedulingTrack implements Track {
   private mousePos?: {x: number; y: number};
   private utidHoveredInThisTrack = -1;
   private fetcher = new TimelineFetcher(this.onBoundsChange.bind(this));
   private maxCpu = 0;
   private engine: EngineProxy;
   private trackUuid = uuidv4Sql();
   private config: Config;

   constructor(engine: EngineProxy, config: Config) {
     this.engine = engine;
     this.config = config;
   }

   async onCreate(): Promise<void> {
     const cpus = await this.engine.getCpus();

     // A process scheduling track should only exist in a trace that has cpus.
     assertTrue(cpus.length > 0);
     this.maxCpu = Math.max(...cpus) + 1;

     if (this.config.upid !== null) {
       await this.engine.query(`
         create virtual table process_scheduling_${this.trackUuid}
         using __intrinsic_slice_mipmap((
           select
             id,
             ts,
             iif(
               dur = -1,
               lead(ts, 1, trace_end()) over (partition by cpu order by ts) - ts,
               dur
             ) as dur,
             cpu as depth
           from experimental_sched_upid
           where
             utid != 0 and
             upid = ${this.config.upid}
         ));
       `);
     } else {
       assertExists(this.config.utid);
       await this.engine.query(`
         create virtual table process_scheduling_${this.trackUuid}
         using __intrinsic_slice_mipmap((
           select
             id,
             ts,
             iif(
               dur = -1,
               lead(ts, 1, trace_end()) over (partition by cpu order by ts) - ts,
               dur
             ) as dur,
             cpu as depth
           from sched
           where utid = ${this.config.utid}
         ));
       `);
     }
   }

   async onUpdate(): Promise<void> {
     await this.fetcher.requestDataForCurrentTime();
   }

   async onDestroy(): Promise<void> {
     this.fetcher.dispose();
     if (this.engine.isAlive) {
       await this.engine.query(`
         drop table process_scheduling_${this.trackUuid}
       `);
     }
   }

   async onBoundsChange(
     start: time,
     end: time,
     resolution: duration,
   ): Promise<Data> {
     // Resolution must always be a power of 2 for this logic to work
     assertTrue(BIMath.popcount(resolution) === 1, `${resolution} not pow of 2`);

     const queryRes = await this.queryData(start, end, resolution);
     const numRows = queryRes.numRows();
     const slices: Data = {
       kind: 'slice',
       start,
       end,
       resolution,
       length: numRows,
       maxCpu: this.maxCpu,
       starts: new BigInt64Array(numRows),
       ends: new BigInt64Array(numRows),
       cpus: new Uint32Array(numRows),
       utids: new Uint32Array(numRows),
     };

     const it = queryRes.iter({
       ts: LONG,
       dur: LONG,
       cpu: NUM,
       utid: NUM,
     });

     for (let row = 0; it.valid(); it.next(), row++) {
       const start = Time.fromRaw(it.ts);
       const dur = it.dur;
       const end = Time.add(start, dur);

       slices.starts[row] = start;
       slices.ends[row] = end;
       slices.cpus[row] = it.cpu;
       slices.utids[row] = it.utid;
       slices.end = Time.max(end, slices.end);
     }
     return slices;
   }

   private async queryData(
     start: time,
     end: time,
     bucketSize: duration,
   ): Promise<QueryResult> {
     return this.engine.query(`
       select
         (z.ts / ${bucketSize}) * ${bucketSize} as ts,
         iif(s.dur = -1, s.dur, max(z.dur, ${bucketSize})) as dur,
         s.id,
         z.depth as cpu,
         utid
       from process_scheduling_${this.trackUuid}(
         ${start}, ${end}, ${bucketSize}
       ) z
       cross join sched s using (id)
     `);
   }

   getHeight(): number {
     return TRACK_HEIGHT;
   }

   render(ctx: CanvasRenderingContext2D, size: PanelSize): void {
     // TODO: fonts and colors should come from the CSS and not hardcoded here.
     const {visibleTimeScale, visibleTimeSpan} = globals.timeline;
     const data = this.fetcher.data;

     if (data === undefined) return; // Can't possibly draw anything.

     // If the cached trace slices don't fully cover the visible time range,
     // show a gray rectangle with a "Loading..." label.
     checkerboardExcept(
       ctx,
       this.getHeight(),
       0,
       size.width,
       visibleTimeScale.timeToPx(data.start),
       visibleTimeScale.timeToPx(data.end),
     );

     assertTrue(data.starts.length === data.ends.length);
     assertTrue(data.starts.length === data.utids.length);

     const cpuTrackHeight = Math.floor(RECT_HEIGHT / data.maxCpu);

     for (let i = 0; i < data.ends.length; i++) {
       const tStart = Time.fromRaw(data.starts[i]);
       const tEnd = Time.fromRaw(data.ends[i]);

       // Cull slices that lie completely outside the visible window
       if (!visibleTimeSpan.intersects(tStart, tEnd)) continue;

       const utid = data.utids[i];
       const cpu = data.cpus[i];

       const rectStart = Math.floor(visibleTimeScale.timeToPx(tStart));
       const rectEnd = Math.floor(visibleTimeScale.timeToPx(tEnd));
       const rectWidth = Math.max(1, rectEnd - rectStart);

       const threadInfo = globals.threads.get(utid);
       // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
       const pid = (threadInfo ? threadInfo.pid : -1) || -1;

       const isHovering = globals.state.hoveredUtid !== -1;
       const isThreadHovered = globals.state.hoveredUtid === utid;
       const isProcessHovered = globals.state.hoveredPid === pid;
       const colorScheme = colorForThread(threadInfo);
       let color: Color;
       if (isHovering && !isThreadHovered) {
         if (!isProcessHovered) {
           color = colorScheme.disabled;
         } else {
           color = colorScheme.variant;
         }
       } else {
         color = colorScheme.base;
       }
       ctx.fillStyle = color.cssString;
       const y = MARGIN_TOP + cpuTrackHeight * cpu + cpu;
       ctx.fillRect(rectStart, y, rectWidth, cpuTrackHeight);
     }

     const hoveredThread = globals.threads.get(this.utidHoveredInThisTrack);
     const height = this.getHeight();
     if (hoveredThread !== undefined && this.mousePos !== undefined) {
       const tidText = `T: ${hoveredThread.threadName} [${hoveredThread.tid}]`;
       // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
       if (hoveredThread.pid) {
         const pidText = `P: ${hoveredThread.procName} [${hoveredThread.pid}]`;
         drawTrackHoverTooltip(ctx, this.mousePos, height, pidText, tidText);
       } else {
         drawTrackHoverTooltip(ctx, this.mousePos, height, tidText);
       }
     }
   }

   onMouseMove(pos: {x: number; y: number}) {
     const data = this.fetcher.data;
     this.mousePos = pos;
     if (data === undefined) return;
     if (pos.y < MARGIN_TOP || pos.y > MARGIN_TOP + RECT_HEIGHT) {
       this.utidHoveredInThisTrack = -1;
       globals.dispatch(Actions.setHoveredUtidAndPid({utid: -1, pid: -1}));
       return;
     }

     const cpuTrackHeight = Math.floor(RECT_HEIGHT / data.maxCpu);
     const cpu = Math.floor((pos.y - MARGIN_TOP) / (cpuTrackHeight + 1));
     const {visibleTimeScale} = globals.timeline;
     const t = visibleTimeScale.pxToHpTime(pos.x).toTime('floor');

     const [i, j] = searchRange(data.starts, t, searchEq(data.cpus, cpu));
     if (i === j || i >= data.starts.length || t > data.ends[i]) {
       this.utidHoveredInThisTrack = -1;
       globals.dispatch(Actions.setHoveredUtidAndPid({utid: -1, pid: -1}));
       return;
     }

     const utid = data.utids[i];
     this.utidHoveredInThisTrack = utid;
     const threadInfo = globals.threads.get(utid);
     // eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
     const pid = threadInfo ? (threadInfo.pid ? threadInfo.pid : -1) : -1;
     globals.dispatch(Actions.setHoveredUtidAndPid({utid, pid}));
   }

   onMouseOut() {
     this.utidHoveredInThisTrack = -1;
     globals.dispatch(Actions.setHoveredUtidAndPid({utid: -1, pid: -1}));
     this.mousePos = undefined;
   }
 }
	// Copyright (C) 2023 The Android Open Source Project
	//
	// 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.

	import {BigintMath as BIMath} from '../../base/bigint_math';
	import {searchEq, searchRange} from '../../base/binary_search';
	import {assertExists, assertTrue} from '../../base/logging';
	import {duration, time, Time} from '../../base/time';
	import {Actions} from '../../common/actions';
	import {drawTrackHoverTooltip} from '../../common/canvas_utils';
	import {Color} from '../../core/color';
	import {colorForThread} from '../../core/colorizer';
	import {TrackData} from '../../common/track_data';
	import {TimelineFetcher} from '../../common/track_helper';
	import {checkerboardExcept} from '../../frontend/checkerboard';
	import {globals} from '../../frontend/globals';
	import {PanelSize} from '../../frontend/panel';
	import {EngineProxy, Track} from '../../public';
	import {LONG, NUM, QueryResult} from '../../trace_processor/query_result';
	import {uuidv4Sql} from '../../base/uuid';

	export const PROCESS_SCHEDULING_TRACK_KIND = 'ProcessSchedulingTrack';

	const MARGIN_TOP = 5;
	const RECT_HEIGHT = 30;
	const TRACK_HEIGHT = MARGIN_TOP * 2 + RECT_HEIGHT;

	interface Data extends TrackData {
	kind: 'slice';
	maxCpu: number;

	// Slices are stored in a columnar fashion. All fields have the same length.
	starts: BigInt64Array;
	ends: BigInt64Array;
	utids: Uint32Array;
	cpus: Uint32Array;
	}

	export interface Config {
	pidForColor: number;
	upid: number \| null;
	utid: number \| null;
	}

	export class ProcessSchedulingTrack implements Track {
	private mousePos?: {x: number; y: number};
	private utidHoveredInThisTrack = -1;
	private fetcher = new TimelineFetcher(this.onBoundsChange.bind(this));
	private maxCpu = 0;
	private engine: EngineProxy;
	private trackUuid = uuidv4Sql();
	private config: Config;

	constructor(engine: EngineProxy, config: Config) {
	this.engine = engine;
	this.config = config;
	}

	async onCreate(): Promise<void> {
	const cpus = await this.engine.getCpus();

	// A process scheduling track should only exist in a trace that has cpus.
	assertTrue(cpus.length > 0);
	this.maxCpu = Math.max(...cpus) + 1;

	if (this.config.upid !== null) {
	await this.engine.query(`
	create virtual table process_scheduling_${this.trackUuid}
	using __intrinsic_slice_mipmap((
	select
	id,
	ts,
	iif(
	dur = -1,
	lead(ts, 1, trace_end()) over (partition by cpu order by ts) - ts,
	dur
	) as dur,
	cpu as depth
	from experimental_sched_upid
	where
	utid != 0 and
	upid = ${this.config.upid}
	));
	`);
	} else {
	assertExists(this.config.utid);
	await this.engine.query(`
	create virtual table process_scheduling_${this.trackUuid}
	using __intrinsic_slice_mipmap((
	select
	id,
	ts,
	iif(
	dur = -1,
	lead(ts, 1, trace_end()) over (partition by cpu order by ts) - ts,
	dur
	) as dur,
	cpu as depth
	from sched
	where utid = ${this.config.utid}
	));
	`);
	}
	}

	async onUpdate(): Promise<void> {
	await this.fetcher.requestDataForCurrentTime();
	}

	async onDestroy(): Promise<void> {
	this.fetcher.dispose();
	if (this.engine.isAlive) {
	await this.engine.query(`
	drop table process_scheduling_${this.trackUuid}
	`);
	}
	}

	async onBoundsChange(
	start: time,
	end: time,
	resolution: duration,
	): Promise<Data> {
	// Resolution must always be a power of 2 for this logic to work
	assertTrue(BIMath.popcount(resolution) === 1, `${resolution} not pow of 2`);

	const queryRes = await this.queryData(start, end, resolution);
	const numRows = queryRes.numRows();
	const slices: Data = {
	kind: 'slice',
	start,
	end,
	resolution,
	length: numRows,
	maxCpu: this.maxCpu,
	starts: new BigInt64Array(numRows),
	ends: new BigInt64Array(numRows),
	cpus: new Uint32Array(numRows),
	utids: new Uint32Array(numRows),
	};

	const it = queryRes.iter({
	ts: LONG,
	dur: LONG,
	cpu: NUM,
	utid: NUM,
	});

	for (let row = 0; it.valid(); it.next(), row++) {
	const start = Time.fromRaw(it.ts);
	const dur = it.dur;
	const end = Time.add(start, dur);

	slices.starts[row] = start;
	slices.ends[row] = end;
	slices.cpus[row] = it.cpu;
	slices.utids[row] = it.utid;
	slices.end = Time.max(end, slices.end);
	}
	return slices;
	}

	private async queryData(
	start: time,
	end: time,
	bucketSize: duration,
	): Promise<QueryResult> {
	return this.engine.query(`
	select
	(z.ts / ${bucketSize}) * ${bucketSize} as ts,
	iif(s.dur = -1, s.dur, max(z.dur, ${bucketSize})) as dur,
	s.id,
	z.depth as cpu,
	utid
	from process_scheduling_${this.trackUuid}(
	${start}, ${end}, ${bucketSize}
	) z
	cross join sched s using (id)
	`);
	}

	getHeight(): number {
	return TRACK_HEIGHT;
	}

	render(ctx: CanvasRenderingContext2D, size: PanelSize): void {
	// TODO: fonts and colors should come from the CSS and not hardcoded here.
	const {visibleTimeScale, visibleTimeSpan} = globals.timeline;
	const data = this.fetcher.data;

	if (data === undefined) return; // Can't possibly draw anything.

	// If the cached trace slices don't fully cover the visible time range,
	// show a gray rectangle with a "Loading..." label.
	checkerboardExcept(
	ctx,
	this.getHeight(),
	0,
	size.width,
	visibleTimeScale.timeToPx(data.start),
	visibleTimeScale.timeToPx(data.end),
	);

	assertTrue(data.starts.length === data.ends.length);
	assertTrue(data.starts.length === data.utids.length);

	const cpuTrackHeight = Math.floor(RECT_HEIGHT / data.maxCpu);

	for (let i = 0; i < data.ends.length; i++) {
	const tStart = Time.fromRaw(data.starts[i]);
	const tEnd = Time.fromRaw(data.ends[i]);

	// Cull slices that lie completely outside the visible window
	if (!visibleTimeSpan.intersects(tStart, tEnd)) continue;

	const utid = data.utids[i];
	const cpu = data.cpus[i];

	const rectStart = Math.floor(visibleTimeScale.timeToPx(tStart));
	const rectEnd = Math.floor(visibleTimeScale.timeToPx(tEnd));
	const rectWidth = Math.max(1, rectEnd - rectStart);

	const threadInfo = globals.threads.get(utid);
	// eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
	const pid = (threadInfo ? threadInfo.pid : -1) \|\| -1;

	const isHovering = globals.state.hoveredUtid !== -1;
	const isThreadHovered = globals.state.hoveredUtid === utid;
	const isProcessHovered = globals.state.hoveredPid === pid;
	const colorScheme = colorForThread(threadInfo);
	let color: Color;
	if (isHovering && !isThreadHovered) {
	if (!isProcessHovered) {
	color = colorScheme.disabled;
	} else {
	color = colorScheme.variant;
	}
	} else {
	color = colorScheme.base;
	}
	ctx.fillStyle = color.cssString;
	const y = MARGIN_TOP + cpuTrackHeight * cpu + cpu;
	ctx.fillRect(rectStart, y, rectWidth, cpuTrackHeight);
	}

	const hoveredThread = globals.threads.get(this.utidHoveredInThisTrack);
	const height = this.getHeight();
	if (hoveredThread !== undefined && this.mousePos !== undefined) {
	const tidText = `T: ${hoveredThread.threadName} [${hoveredThread.tid}]`;
	// eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
	if (hoveredThread.pid) {
	const pidText = `P: ${hoveredThread.procName} [${hoveredThread.pid}]`;
	drawTrackHoverTooltip(ctx, this.mousePos, height, pidText, tidText);
	} else {
	drawTrackHoverTooltip(ctx, this.mousePos, height, tidText);
	}
	}
	}

	onMouseMove(pos: {x: number; y: number}) {
	const data = this.fetcher.data;
	this.mousePos = pos;
	if (data === undefined) return;
	if (pos.y < MARGIN_TOP \|\| pos.y > MARGIN_TOP + RECT_HEIGHT) {
	this.utidHoveredInThisTrack = -1;
	globals.dispatch(Actions.setHoveredUtidAndPid({utid: -1, pid: -1}));
	return;
	}

	const cpuTrackHeight = Math.floor(RECT_HEIGHT / data.maxCpu);
	const cpu = Math.floor((pos.y - MARGIN_TOP) / (cpuTrackHeight + 1));
	const {visibleTimeScale} = globals.timeline;
	const t = visibleTimeScale.pxToHpTime(pos.x).toTime('floor');

	const [i, j] = searchRange(data.starts, t, searchEq(data.cpus, cpu));
	if (i === j \|\| i >= data.starts.length \|\| t > data.ends[i]) {
	this.utidHoveredInThisTrack = -1;
	globals.dispatch(Actions.setHoveredUtidAndPid({utid: -1, pid: -1}));
	return;
	}

	const utid = data.utids[i];
	this.utidHoveredInThisTrack = utid;
	const threadInfo = globals.threads.get(utid);
	// eslint-disable-next-line @typescript-eslint/strict-boolean-expressions
	const pid = threadInfo ? (threadInfo.pid ? threadInfo.pid : -1) : -1;
	globals.dispatch(Actions.setHoveredUtidAndPid({utid, pid}));
	}

	onMouseOut() {
	this.utidHoveredInThisTrack = -1;
	globals.dispatch(Actions.setHoveredUtidAndPid({utid: -1, pid: -1}));
	this.mousePos = undefined;
	}
	}