1 // Copyright 2014 the V8 project 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.
5 #include "src/base/sys-info.h"
8 #include <sys/resource.h>
11 #include <sys/types.h>
16 #include <sys/sysctl.h>
21 #include "src/base/logging.h"
22 #include "src/base/macros.h"
24 #include "src/base/win32-headers.h"
31 int SysInfo::NumberOfProcessors() {
33 int mib[2] = {CTL_HW, HW_NCPU};
35 size_t len = sizeof(ncpu);
36 if (sysctl(mib, arraysize(mib), &ncpu, &len, NULL, 0) != 0) {
42 long result = sysconf(_SC_NPROCESSORS_ONLN); // NOLINT(runtime/int)
47 return static_cast<int>(result);
49 SYSTEM_INFO system_info = {0};
50 ::GetNativeSystemInfo(&system_info);
51 return static_cast<int>(system_info.dwNumberOfProcessors);
57 int64_t SysInfo::AmountOfPhysicalMemory() {
59 int mib[2] = {CTL_HW, HW_MEMSIZE};
61 size_t len = sizeof(memsize);
62 if (sysctl(mib, arraysize(mib), &memsize, &len, NULL, 0) != 0) {
69 size_t size = sizeof(pages);
70 sysctlbyname("vm.stats.vm.v_page_count", &pages, &size, NULL, 0);
71 sysctlbyname("vm.stats.vm.v_page_size", &page_size, &size, NULL, 0);
72 if (pages == -1 || page_size == -1) {
76 return static_cast<int64_t>(pages) * page_size;
77 #elif V8_OS_CYGWIN || V8_OS_WIN
78 MEMORYSTATUSEX memory_info;
79 memory_info.dwLength = sizeof(memory_info);
80 if (!GlobalMemoryStatusEx(&memory_info)) {
84 int64_t result = static_cast<int64_t>(memory_info.ullTotalPhys);
85 if (result < 0) result = std::numeric_limits<int64_t>::max();
89 if (stat("/proc", &stat_buf) != 0) {
93 return static_cast<int64_t>(stat_buf.st_size);
95 // No support for _SC_PHYS_PAGES, assume 2GB.
96 return static_cast<int64_t>(1) << 31;
98 long pages = sysconf(_SC_PHYS_PAGES); // NOLINT(runtime/int)
99 long page_size = sysconf(_SC_PAGESIZE); // NOLINT(runtime/int)
100 if (pages == -1 || page_size == -1) {
104 return static_cast<int64_t>(pages) * page_size;
110 int64_t SysInfo::AmountOfVirtualMemory() {
111 #if V8_OS_NACL || V8_OS_WIN
115 int result = getrlimit(RLIMIT_DATA, &rlim);
120 return (rlim.rlim_cur == RLIM_INFINITY) ? 0 : rlim.rlim_cur;