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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "base/process/process_metrics.h"
6 
7 namespace base {
8 
ProcessMetrics(ProcessHandle process)9 ProcessMetrics::ProcessMetrics(ProcessHandle process)
10     : process_(process),
11       last_time_(0),
12       last_system_time_(0),
13       last_cpu_(0) {
14   processor_count_ = base::SysInfo::NumberOfProcessors();
15 }
16 
17 // static
CreateProcessMetrics(ProcessHandle process)18 ProcessMetrics* ProcessMetrics::CreateProcessMetrics(ProcessHandle process) {
19   return new ProcessMetrics(process);
20 }
21 
GetPagefileUsage() const22 size_t ProcessMetrics::GetPagefileUsage() const {
23   struct kinfo_proc info;
24   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_ };
25   size_t length = sizeof(info);
26 
27   if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
28     return 0;
29 
30   return info.ki_size;
31 }
32 
GetPeakPagefileUsage() const33 size_t ProcessMetrics::GetPeakPagefileUsage() const {
34   return 0;
35 }
36 
GetWorkingSetSize() const37 size_t ProcessMetrics::GetWorkingSetSize() const {
38   struct kinfo_proc info;
39   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_ };
40   size_t length = sizeof(info);
41 
42   if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
43     return 0;
44 
45   return info.ki_rssize * getpagesize();
46 }
47 
GetPeakWorkingSetSize() const48 size_t ProcessMetrics::GetPeakWorkingSetSize() const {
49   return 0;
50 }
51 
GetMemoryBytes(size_t * private_bytes,size_t * shared_bytes)52 bool ProcessMetrics::GetMemoryBytes(size_t* private_bytes,
53                                     size_t* shared_bytes) {
54   WorkingSetKBytes ws_usage;
55   if (!GetWorkingSetKBytes(&ws_usage))
56     return false;
57 
58   if (private_bytes)
59     *private_bytes = ws_usage.priv << 10;
60 
61   if (shared_bytes)
62     *shared_bytes = ws_usage.shared * 1024;
63 
64   return true;
65 }
66 
GetWorkingSetKBytes(WorkingSetKBytes * ws_usage) const67 bool ProcessMetrics::GetWorkingSetKBytes(WorkingSetKBytes* ws_usage) const {
68 // TODO(bapt) be sure we can't be precise
69   size_t priv = GetWorkingSetSize();
70   if (!priv)
71     return false;
72   ws_usage->priv = priv / 1024;
73   ws_usage->shareable = 0;
74   ws_usage->shared = 0;
75 
76   return true;
77 }
78 
GetCPUUsage()79 double ProcessMetrics::GetCPUUsage() {
80   struct kinfo_proc info;
81   int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, process_ };
82   size_t length = sizeof(info);
83 
84   struct timeval now;
85   int retval = gettimeofday(&now, NULL);
86   if (retval)
87     return 0;
88 
89   if (sysctl(mib, arraysize(mib), &info, &length, NULL, 0) < 0)
90     return 0;
91 
92   return (info.ki_pctcpu / FSCALE) * 100.0;
93 }
94 
GetIOCounters(IoCounters * io_counters) const95 bool ProcessMetrics::GetIOCounters(IoCounters* io_counters) const {
96   return false;
97 }
98 
GetSystemCommitCharge()99 size_t GetSystemCommitCharge() {
100   int mib[2], pagesize;
101   unsigned long mem_total, mem_free, mem_inactive;
102   size_t length = sizeof(mem_total);
103 
104   if (sysctl(mib, arraysize(mib), &mem_total, &length, NULL, 0) < 0)
105     return 0;
106 
107   length = sizeof(mem_free);
108   if (sysctlbyname("vm.stats.vm.v_free_count", &mem_free, &length, NULL, 0) < 0)
109     return 0;
110 
111   length = sizeof(mem_inactive);
112   if (sysctlbyname("vm.stats.vm.v_inactive_count", &mem_inactive, &length,
113       NULL, 0) < 0) {
114     return 0;
115   }
116 
117   pagesize = getpagesize();
118 
119   return mem_total - (mem_free*pagesize) - (mem_inactive*pagesize);
120 }
121 
122 }  // namespace base
123