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// Copyright (C) 2018 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 {slowlyCountRows} from '../../common/query_iterator';
import {fromNs, toNs} from '../../common/time';
import {
TrackController,
trackControllerRegistry,
} from '../../controller/track_controller';
import {Config, Data, SLICE_TRACK_KIND} from './common';
class ChromeSliceTrackController extends TrackController<Config, Data> {
static readonly kind = SLICE_TRACK_KIND;
private maxDurNs = 0;
async onBoundsChange(start: number, end: number, resolution: number):
Promise<Data> {
const startNs = toNs(start);
const endNs = toNs(end);
const pxSize = this.pxSize();
// ns per quantization bucket (i.e. ns per pixel). /2 * 2 is to force it to
// be an even number, so we can snap in the middle.
const bucketNs = Math.max(Math.round(resolution * 1e9 * pxSize / 2) * 2, 1);
const tableName = this.namespaceTable('slice');
if (this.maxDurNs === 0) {
const query = `
SELECT max(iif(dur = -1, (SELECT end_ts FROM trace_bounds) - ts, dur))
FROM ${tableName} WHERE track_id = ${this.config.trackId}`;
const rawResult = await this.query(query);
if (slowlyCountRows(rawResult) === 1) {
this.maxDurNs = rawResult.columns[0].longValues![0];
}
}
const query = `
SELECT
(ts + ${bucketNs / 2}) / ${bucketNs} * ${bucketNs} as tsq,
ts,
max(iif(dur = -1, (SELECT end_ts FROM trace_bounds) - ts, dur)),
depth,
id as slice_id,
name,
dur = 0 as is_instant,
dur = -1 as is_incomplete
FROM ${tableName}
WHERE track_id = ${this.config.trackId} AND
ts >= (${startNs - this.maxDurNs}) AND
ts <= ${endNs}
GROUP BY depth, tsq`;
const rawResult = await this.query(query);
const numRows = slowlyCountRows(rawResult);
const slices: Data = {
start,
end,
resolution,
length: numRows,
strings: [],
sliceIds: new Float64Array(numRows),
starts: new Float64Array(numRows),
ends: new Float64Array(numRows),
depths: new Uint16Array(numRows),
titles: new Uint16Array(numRows),
isInstant: new Uint16Array(numRows),
isIncomplete: new Uint16Array(numRows),
};
const stringIndexes = new Map<string, number>();
function internString(str: string) {
let idx = stringIndexes.get(str);
if (idx !== undefined) return idx;
idx = slices.strings.length;
slices.strings.push(str);
stringIndexes.set(str, idx);
return idx;
}
const cols = rawResult.columns;
for (let row = 0; row < numRows; row++) {
const startNsQ = +cols[0].longValues![row];
const startNs = +cols[1].longValues![row];
const durNs = +cols[2].longValues![row];
const endNs = startNs + durNs;
const isInstant = +cols[6].longValues![row];
const isIncomplete = +cols[7].longValues![row];
let endNsQ = Math.floor((endNs + bucketNs / 2 - 1) / bucketNs) * bucketNs;
endNsQ = Math.max(endNsQ, startNsQ + bucketNs);
if (!isInstant && startNsQ === endNsQ) {
throw new Error(
'Expected startNsQ and endNsQ to differ (' +
`startNsQ: ${startNsQ}, startNs: ${startNs},` +
` endNsQ: ${endNsQ}, durNs: ${durNs},` +
` endNs: ${endNs}, bucketNs: ${bucketNs})`);
}
slices.starts[row] = fromNs(startNsQ);
slices.ends[row] = fromNs(endNsQ);
slices.depths[row] = +cols[3].longValues![row];
slices.sliceIds[row] = +cols[4].longValues![row];
slices.titles[row] = internString(cols[5].stringValues![row]);
slices.isInstant[row] = isInstant;
slices.isIncomplete[row] = isIncomplete;
}
return slices;
}
}
trackControllerRegistry.register(ChromeSliceTrackController);
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