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// Copyright (C) 2024 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 {duration, Time, time} from '../../base/time';
import {colorForFtrace} from '../../core/colorizer';
import {LIMIT} from '../../common/track_data';
import {TimelineFetcher} from '../../common/track_helper';
import {checkerboardExcept} from '../../frontend/checkerboard';
import {globals} from '../../frontend/globals';
import {TrackData} from '../../common/track_data';
import {PanelSize} from '../../frontend/panel';
import {EngineProxy, Track} from '../../public';
import {LONG, STR} from '../../trace_processor/query_result';
import {FtraceFilter} from './common';
import {Store} from '../../public';
import {Monitor} from '../../base/monitor';
const MARGIN = 2;
const RECT_HEIGHT = 18;
const TRACK_HEIGHT = RECT_HEIGHT + 2 * MARGIN;
export interface Data extends TrackData {
timestamps: BigInt64Array;
names: string[];
}
export interface Config {
cpu?: number;
}
export class FtraceRawTrack implements Track {
private fetcher = new TimelineFetcher(this.onBoundsChange.bind(this));
private engine: EngineProxy;
private cpu: number;
private store: Store<FtraceFilter>;
private readonly monitor: Monitor;
constructor(engine: EngineProxy, cpu: number, store: Store<FtraceFilter>) {
this.engine = engine;
this.cpu = cpu;
this.store = store;
this.monitor = new Monitor([() => store.state]);
}
async onUpdate(): Promise<void> {
this.monitor.ifStateChanged(() => {
this.fetcher.invalidate();
});
await this.fetcher.requestDataForCurrentTime();
}
async onDestroy?(): Promise<void> {
this.fetcher.dispose();
}
getHeight(): number {
return TRACK_HEIGHT;
}
async onBoundsChange(
start: time,
end: time,
resolution: duration,
): Promise<Data> {
const excludeList = Array.from(this.store.state.excludeList);
const excludeListSql = excludeList.map((s) => `'${s}'`).join(',');
const cpuFilter = this.cpu === undefined ? '' : `and cpu = ${this.cpu}`;
const queryRes = await this.engine.query(`
select
cast(ts / ${resolution} as integer) * ${resolution} as tsQuant,
name
from ftrace_event
where
name not in (${excludeListSql}) and
ts >= ${start} and ts <= ${end} ${cpuFilter}
group by tsQuant
order by tsQuant limit ${LIMIT};`);
const rowCount = queryRes.numRows();
const result: Data = {
start,
end,
resolution,
length: rowCount,
timestamps: new BigInt64Array(rowCount),
names: [],
};
const it = queryRes.iter({tsQuant: LONG, name: STR});
for (let row = 0; it.valid(); it.next(), row++) {
result.timestamps[row] = it.tsQuant;
result.names[row] = it.name;
}
return result;
}
render(ctx: CanvasRenderingContext2D, size: PanelSize): void {
const {visibleTimeScale} = globals.timeline;
const data = this.fetcher.data;
if (data === undefined) return; // Can't possibly draw anything.
const dataStartPx = visibleTimeScale.timeToPx(data.start);
const dataEndPx = visibleTimeScale.timeToPx(data.end);
checkerboardExcept(
ctx,
this.getHeight(),
0,
size.width,
dataStartPx,
dataEndPx,
);
const diamondSideLen = RECT_HEIGHT / Math.sqrt(2);
for (let i = 0; i < data.timestamps.length; i++) {
const name = data.names[i];
ctx.fillStyle = colorForFtrace(name).base.cssString;
const timestamp = Time.fromRaw(data.timestamps[i]);
const xPos = Math.floor(visibleTimeScale.timeToPx(timestamp));
// Draw a diamond over the event
ctx.save();
ctx.translate(xPos, MARGIN);
ctx.rotate(Math.PI / 4);
ctx.fillRect(0, 0, diamondSideLen, diamondSideLen);
ctx.restore();
}
}
}
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