1 // Copyright 2013 The Chromium Authors
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 #include <stddef.h>
8 #include <sys/sysctl.h>
9 #include <sys/user.h>
10 #include <unistd.h>
11
12 #include "base/memory/ptr_util.h"
13
14 namespace base {
15
ProcessMetrics(ProcessHandle process)16 ProcessMetrics::ProcessMetrics(ProcessHandle process)
17 : process_(process),
18 last_cpu_(0) {}
19
20 // static
CreateProcessMetrics(ProcessHandle process)21 std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
22 ProcessHandle process) {
23 return WrapUnique(new ProcessMetrics(process));
24 }
25
26 base::expected<double, ProcessCPUUsageError>
GetPlatformIndependentCPUUsage()27 ProcessMetrics::GetPlatformIndependentCPUUsage() {
28 struct kinfo_proc info;
29 int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, process_};
30 size_t length = sizeof(info);
31
32 if (sysctl(mib, std::size(mib), &info, &length, NULL, 0) < 0)
33 return base::unexpected(ProcessCPUUsageError::kSystemError);
34
35 return base::ok(double{info.ki_pctcpu} / FSCALE * 100.0);
36 }
37
38 base::expected<TimeDelta, ProcessCPUUsageError>
GetCumulativeCPUUsage()39 ProcessMetrics::GetCumulativeCPUUsage() {
40 NOTREACHED();
41 }
42
GetSystemCommitCharge()43 size_t GetSystemCommitCharge() {
44 int mib[2], pagesize;
45 unsigned long mem_total, mem_free, mem_inactive;
46 size_t length = sizeof(mem_total);
47
48 if (sysctl(mib, std::size(mib), &mem_total, &length, NULL, 0) < 0)
49 return 0;
50
51 length = sizeof(mem_free);
52 if (sysctlbyname("vm.stats.vm.v_free_count", &mem_free, &length, NULL, 0) < 0)
53 return 0;
54
55 length = sizeof(mem_inactive);
56 if (sysctlbyname("vm.stats.vm.v_inactive_count", &mem_inactive, &length,
57 NULL, 0) < 0) {
58 return 0;
59 }
60
61 pagesize = getpagesize();
62
63 return mem_total - (mem_free*pagesize) - (mem_inactive*pagesize);
64 }
65
66 } // namespace base
67