74 lines
2.1 KiB
PHP
74 lines
2.1 KiB
PHP
<?php
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namespace App\Services\IterationEventBuffer;
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use App\Events\PerceptronTrainingIteration;
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class PerceptronIterationEventBuffer implements IPerceptronIterationEventBuffer
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{
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private array $data = [];
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private ?float $lastBroadcastAt = null;
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public function __construct(
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private string $sessionId,
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private string $trainingId,
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) {}
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public function flush(): void
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{
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if ($this->data === []) {
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return;
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}
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$this->waitForBroadcastInterval();
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event(new PerceptronTrainingIteration($this->data, $this->sessionId, $this->trainingId));
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$this->lastBroadcastAt = microtime(true);
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$this->data = [];
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}
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public function addIteration(int $epoch, int $exampleIndex, float $error, array $synaptic_weights): void
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{
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$iteration = [
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'epoch' => $epoch,
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'exampleIndex' => $exampleIndex,
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'error' => $error,
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'weights' => $synaptic_weights,
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];
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$this->data[] = $iteration;
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if ($this->data !== [] && $this->payloadExceedsLimit()) {
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$lastIteration = array_pop($this->data);
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$this->flush();
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$this->data[] = $lastIteration;
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}
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if (count($this->data) >= config('perceptron.broadcast_iteration_size')) {
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$this->flush();
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}
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}
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private function payloadExceedsLimit(): bool
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{
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return strlen(json_encode([
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'iterations' => PerceptronTrainingIteration::normalizeForJson($this->data),
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'trainingId' => $this->trainingId,
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], JSON_THROW_ON_ERROR)) > config('broadcasting.broadcast_max_payload_size');
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}
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private function waitForBroadcastInterval(): void
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{
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if ($this->lastBroadcastAt === null) {
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return;
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}
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$minimumInterval = config('perceptron.broadcast_minimum_interval_ms') / 1000;
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$remainingInterval = $minimumInterval - (microtime(true) - $this->lastBroadcastAt);
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if ($remainingInterval > 0) {
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usleep((int) ceil($remainingInterval * 1_000_000));
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}
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}
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}
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