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40 lines
1.9 KiB
Plaintext
40 lines
1.9 KiB
Plaintext
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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module blink.mojom;
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import "mojo/public/mojom/base/shared_memory.mojom";
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// There are two phases to estimate a near-OOM situation. First phase takes
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// place in the browser process. When the browser detects a high memory
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// pressure it starts the second phase in the foreground renderer process,
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// as the renderer has the best knowledge about memory usage of pages.
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// The renderer schedules tasks to check memory workload from pages. If the
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// workload exceeds a threshold the renderer notifies that a high memory usage
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// is detected.
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// Browser side interface for OOM intervention. This interface is used to check
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// high memory usage in a renderer.
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interface OomInterventionHost {
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// Called when a renderer detects high memory usage. |intervention_triggered|
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// is set to true when the OOM intervention is activated in the renderer.
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OnHighMemoryUsage(bool intervention_triggered);
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};
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// Renderer side interface for OOM intervention. An instance of this interface
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// will be created when the browser gets a high memory pressure signal.
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// It monitors memory usage in renderer side to detect near-OOM situation.
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interface OomIntervention {
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// Starts monitoring memory usage in renderer side. When the renderer's
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// memory usage exceeds |memory_workload_threshold| (in bytes) the renderer
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// calls host->OnHighMemoryUsage(). The renderer also triggers OOM
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// intervention when |trigger_intervention| is true. |shared_metrics_buffer|
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// stores the OomInterventionMetrics struct in shared memory. The buffer is
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// expected to be upated very often with memory metrics.
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StartDetection(OomInterventionHost host,
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mojo_base.mojom.UnsafeSharedMemoryRegion shared_metrics_buffer,
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uint64 memory_workload_threshold,
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bool trigger_intervention);
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};
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