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58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
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// Copyright 2013 The Chromium Authors
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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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#include "base/android/sys_utils.h"
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#include <memory>
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#include "base/android/build_info.h"
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#include "base/process/process_metrics.h"
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#include "base/system/sys_info.h"
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#include "base/trace_event/base_tracing.h"
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// Must come after all headers that specialize FromJniType() / ToJniType().
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#include "base/sys_utils_jni/SysUtils_jni.h"
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namespace base {
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namespace android {
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bool SysUtils::IsLowEndDeviceFromJni() {
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JNIEnv* env = AttachCurrentThread();
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return Java_SysUtils_isLowEndDevice(env);
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}
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bool SysUtils::IsCurrentlyLowMemory() {
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JNIEnv* env = AttachCurrentThread();
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return Java_SysUtils_isCurrentlyLowMemory(env);
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}
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// static
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int SysUtils::AmountOfPhysicalMemoryKB() {
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JNIEnv* env = AttachCurrentThread();
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return Java_SysUtils_amountOfPhysicalMemoryKB(env);
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}
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// Logs the number of minor / major page faults to tracing (and also the time to
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// collect) the metrics. Does nothing if tracing is not enabled.
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static void JNI_SysUtils_LogPageFaultCountToTracing(JNIEnv* env) {
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// This is racy, but we are OK losing data, and collecting it is potentially
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// expensive (reading and parsing a file).
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bool enabled;
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TRACE_EVENT_CATEGORY_GROUP_ENABLED("startup", &enabled);
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if (!enabled)
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return;
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TRACE_EVENT_BEGIN2("memory", "CollectPageFaultCount", "minor", 0, "major", 0);
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std::unique_ptr<base::ProcessMetrics> process_metrics(
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base::ProcessMetrics::CreateProcessMetrics(
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base::GetCurrentProcessHandle()));
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base::PageFaultCounts counts;
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process_metrics->GetPageFaultCounts(&counts);
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TRACE_EVENT_END2("memory", "CollectPageFaults", "minor", counts.minor,
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"major", counts.major);
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}
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} // namespace android
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} // namespace base
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