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/*!A cross-platform build utility based on Lua
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Copyright (C) 2015-present, Xmake Open Source Community.
*
* @author ruki
* @file cpuinfo.c
*
*/
/* //////////////////////////////////////////////////////////////////////////////////////
* trace
*/
#define TB_TRACE_MODULE_NAME "cpuinfo"
#define TB_TRACE_MODULE_DEBUG (0)
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
#if defined(TB_CONFIG_OS_MACOSX)
#include <sys/sysctl.h>
#include <sys/types.h>
#include <mach/mach.h>
#include <mach/processor_info.h>
#include <mach/mach_host.h>
#elif defined(TB_CONFIG_OS_WINDOWS)
#include <windows.h>
#elif defined(TB_CONFIG_OS_LINUX)
#include <stdio.h>
#elif defined(TB_CONFIG_OS_BSD)
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <unistd.h>
#endif
/* //////////////////////////////////////////////////////////////////////////////////////
* private implementation
*/
#if defined(TB_CONFIG_OS_WINDOWS)
static tb_uint64_t xm_os_cpuinfo_subtract_times(FILETIME const *one, FILETIME const *two) {
LARGE_INTEGER a, b;
a.LowPart = one->dwLowDateTime;
a.HighPart = one->dwHighDateTime;
b.LowPart = two->dwLowDateTime;
b.HighPart = two->dwHighDateTime;
return (tb_uint64_t)(a.QuadPart - b.QuadPart);
}
#endif
static tb_float_t xm_os_cpuinfo_usagerate() {
#if defined(TB_CONFIG_OS_MACOSX)
tb_float_t usagerate = 0;
natural_t cpu_count = 0;
processor_info_array_t cpuinfo;
mach_msg_type_number_t cpuinfo_count;
static tb_hong_t s_time = 0;
if (tb_mclock() - s_time > 1000 &&
host_processor_info(mach_host_self(), PROCESSOR_CPU_LOAD_INFO, &cpu_count, &cpuinfo, &cpuinfo_count) ==
KERN_SUCCESS) {
static processor_info_array_t s_cpuinfo_prev = tb_null;
static mach_msg_type_number_t s_cpuinfo_count_prev = 0;
for (tb_int_t i = 0; i < cpu_count; ++i) {
tb_int_t use, total;
if (s_cpuinfo_prev) {
use = (cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_USER] -
s_cpuinfo_prev[(CPU_STATE_MAX * i) + CPU_STATE_USER]) +
(cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_SYSTEM] -
s_cpuinfo_prev[(CPU_STATE_MAX * i) + CPU_STATE_SYSTEM]) +
(cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_NICE] -
s_cpuinfo_prev[(CPU_STATE_MAX * i) + CPU_STATE_NICE]);
total = use + (cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_IDLE] -
s_cpuinfo_prev[(CPU_STATE_MAX * i) + CPU_STATE_IDLE]);
} else {
use = cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_USER] + cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_SYSTEM] +
cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_NICE];
total = use + cpuinfo[(CPU_STATE_MAX * i) + CPU_STATE_IDLE];
}
usagerate += total > 0 ? ((tb_float_t)use / (tb_float_t)total) : 0;
}
if (s_cpuinfo_prev) {
vm_deallocate(mach_task_self(), (vm_address_t)s_cpuinfo_prev, sizeof(integer_t) * s_cpuinfo_count_prev);
}
s_time = tb_mclock();
s_cpuinfo_prev = cpuinfo;
s_cpuinfo_count_prev = cpuinfo_count;
}
return cpu_count > 0 ? usagerate / cpu_count : 0;
#elif defined(TB_CONFIG_OS_WINDOWS)
// kernel include idle_time
tb_float_t usagerate = 0;
FILETIME idle, kernel, user;
if (GetSystemTimes(&idle, &kernel, &user)) {
static FILETIME idle_prev = { 0 };
static FILETIME kernel_prev = { 0 };
static FILETIME user_prev = { 0 };
if (idle_prev.dwLowDateTime != 0 && idle_prev.dwHighDateTime != 0) {
tb_uint64_t idle_diff = xm_os_cpuinfo_subtract_times(&idle, &idle_prev);
tb_uint64_t kernel_diff = xm_os_cpuinfo_subtract_times(&kernel, &kernel_prev);
tb_uint64_t user_diff = xm_os_cpuinfo_subtract_times(&user, &user_prev);
// kernel_time - idle_time = kernel_time, because kernel include idle_time
tb_uint64_t sys_total = kernel_diff + user_diff;
tb_uint64_t kernel_total = kernel_diff - idle_diff;
// sometimes kernel_time > idle_time
if (sys_total > 0) {
usagerate = (tb_float_t)((tb_double_t)(kernel_total + user_diff) / sys_total);
}
}
idle_prev = idle;
kernel_prev = kernel;
user_prev = user;
}
return usagerate;
#elif defined(TB_CONFIG_OS_LINUX)
tb_float_t usagerate = 0;
if (tb_file_info("/proc/stat", tb_null)) {
FILE *fp = fopen("/proc/stat", "r");
if (fp) {
tb_char_t line[8192];
static tb_int64_t total_prev = 0;
static tb_int64_t active_prev = 0;
while (!feof(fp)) {
/* cpu 548760 0 867417 102226682 12430 0 9089 0 0 0
* cpu0 136863 0 218110 25632388 2706 0 2328 0 0 0
* cpu1 148383 0 213941 25627686 3925 0 2129 0 0 0
*
* The meanings of the columns are as follows, from left to right:
*
* user: normal processes executing in user mode
* nice: niced processes executing in user mode
* system: processes executing in kernel mode
* idle: twiddling thumbs
* iowait: waiting for I/O to complete
* irq: servicing interrupts
* softirq: servicing softirqs
* steal
* guest
* guest_nice
*/
if (fgets(line, sizeof(line), fp) && !tb_strncmp(line, "cpu ", 4)) {
long long user, nice, sys, idle, iowait, irq, softirq, steal, guest, guest_nice;
if (10 == sscanf(line,
"cpu %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
&user,
&nice,
&sys,
&idle,
&iowait,
&irq,
&softirq,
&steal,
&guest,
&guest_nice)) {
tb_int64_t active = (tb_int64_t)(user + nice + sys + irq + softirq + steal + guest +
guest_nice);
tb_int64_t total = (tb_int64_t)(user + nice + sys + idle + iowait + irq + softirq + steal +
guest + guest_nice);
if (total_prev > 0 && active_prev > 0) {
tb_int64_t total_diff = total - total_prev;
tb_int64_t active_diff = active - active_prev;
if (total_diff > 0) {
usagerate = (tb_float_t)((tb_double_t)active_diff / total_diff);
}
}
total_prev = total;
active_prev = active;
}
break;
}
}
fclose(fp);
}
}
return usagerate;
#elif defined(TB_CONFIG_OS_BSD) && !defined(__OpenBSD__)
#define CP_USER 0
#define CP_NICE 1
#define CP_SYS 2
#define CP_INTR 3
#define CP_IDLE 4
#define CPUSTATES 5
static tb_int64_t total_prev = 0;
static tb_int64_t active_prev = 0;
tb_float_t usagerate = 0;
long states[CPUSTATES] = { 0 };
size_t states_size = sizeof(states);
if (sysctlbyname("kern.cp_time", &states, &states_size, tb_null, 0) == 0) {
tb_long_t user = states[CP_USER];
tb_long_t nice = states[CP_NICE];
tb_long_t sys = states[CP_SYS];
tb_long_t intr = states[CP_INTR];
tb_long_t idle = states[CP_IDLE];
tb_int64_t active = user + nice + sys + intr;
tb_int64_t total = user + nice + sys + idle + intr;
if (total_prev > 0 && active_prev > 0) {
tb_int64_t total_diff = total - total_prev;
tb_int64_t active_diff = active - active_prev;
if (total_diff > 0) {
usagerate = (tb_float_t)((tb_double_t)active_diff / total_diff);
}
}
total_prev = total;
active_prev = active;
}
return usagerate;
#else
return 0;
#endif
}
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation
*/
/* local cpuinfo = os.cpuinfo()
* {
* ncpu = 4,
* ...
* }
*/
tb_int_t xm_os_cpuinfo(lua_State *lua) {
tb_assert_and_check_return_val(lua, 0);
// init table
lua_newtable(lua);
// get cpu number
tb_int_t ncpu = (tb_int_t)tb_cpu_count();
lua_pushstring(lua, "ncpu");
lua_pushinteger(lua, ncpu > 0 ? ncpu : 1);
lua_settable(lua, -3);
// get cpu usage rate
tb_float_t usagerate = xm_os_cpuinfo_usagerate();
if (usagerate >= 0) {
lua_pushstring(lua, "usagerate");
lua_pushnumber(lua, usagerate);
lua_settable(lua, -3);
}
return 1;
}
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