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- // Copyright 2013 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/android/sys_utils.h"
- #include <memory>
- #include "base/android/build_info.h"
- #include "base/base_jni_headers/SysUtils_jni.h"
- #include "base/process/process_metrics.h"
- #include "base/system/sys_info.h"
- #include "base/trace_event/base_tracing.h"
- namespace base {
- namespace android {
- bool SysUtils::IsLowEndDeviceFromJni() {
- JNIEnv* env = AttachCurrentThread();
- return Java_SysUtils_isLowEndDevice(env);
- }
- bool SysUtils::IsCurrentlyLowMemory() {
- JNIEnv* env = AttachCurrentThread();
- return Java_SysUtils_isCurrentlyLowMemory(env);
- }
- // static
- int SysUtils::AmountOfPhysicalMemoryKB() {
- JNIEnv* env = AttachCurrentThread();
- return Java_SysUtils_amountOfPhysicalMemoryKB(env);
- }
- // Logs the number of minor / major page faults to tracing (and also the time to
- // collect) the metrics. Does nothing if tracing is not enabled.
- static void JNI_SysUtils_LogPageFaultCountToTracing(JNIEnv* env) {
- // This is racy, but we are OK losing data, and collecting it is potentially
- // expensive (reading and parsing a file).
- bool enabled;
- TRACE_EVENT_CATEGORY_GROUP_ENABLED("startup", &enabled);
- if (!enabled)
- return;
- TRACE_EVENT_BEGIN2("memory", "CollectPageFaultCount", "minor", 0, "major", 0);
- std::unique_ptr<base::ProcessMetrics> process_metrics(
- base::ProcessMetrics::CreateProcessMetrics(
- base::GetCurrentProcessHandle()));
- base::PageFaultCounts counts;
- process_metrics->GetPageFaultCounts(&counts);
- TRACE_EVENT_END2("memory", "CollectPageFaults", "minor", counts.minor,
- "major", counts.major);
- }
- } // namespace android
- } // namespace base
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