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// Copyright (c) 2009 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 "chrome/test/perf/mem_usage.h"
#include "base/file_util.h"
#include "base/logging.h"
#include "base/process_util.h"
#include "base/string_util.h"
namespace {
// The format of /proc/meminfo is:
//
// MemTotal: 8235324 kB
// MemFree: 1628304 kB
// Buffers: 429596 kB
// Cached: 4728232 kB
// ...
const size_t kMemTotalIndex = 1;
const size_t kMemFreeIndex = 4;
const size_t kMemBuffersIndex = 7;
const size_t kMemCacheIndex = 10;
} // namespace
size_t GetSystemCommitCharge() {
// Used memory is: total - free - buffers - caches
FilePath meminfo_file("/proc/meminfo");
std::string meminfo_data;
if (!file_util::ReadFileToString(meminfo_file, &meminfo_data))
return 0;
std::vector<std::string> meminfo_fields;
SplitStringAlongWhitespace(meminfo_data, &meminfo_fields);
if (meminfo_fields.size() < kMemCacheIndex) {
LOG(ERROR) << "Failed to parse /proc/meminfo. Only found " <<
meminfo_fields.size() << " fields.";
return 0;
}
DCHECK_EQ(meminfo_fields[kMemTotalIndex-1], "MemTotal:");
DCHECK_EQ(meminfo_fields[kMemFreeIndex-1], "MemFree:");
DCHECK_EQ(meminfo_fields[kMemBuffersIndex-1], "Buffers:");
DCHECK_EQ(meminfo_fields[kMemCacheIndex-1], "Cached:");
int result_in_kb;
result_in_kb = StringToInt(meminfo_fields[kMemTotalIndex]);
result_in_kb -= StringToInt(meminfo_fields[kMemFreeIndex]);
result_in_kb -= StringToInt(meminfo_fields[kMemBuffersIndex]);
result_in_kb -= StringToInt(meminfo_fields[kMemCacheIndex]);
return result_in_kb * 1024;
}
void PrintChromeMemoryUsageInfo() {
NOTIMPLEMENTED();
}
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