os.getPriority()方法是os模块的内置应用程序编程接口，用于获取由以下命令指定的进程的调度优先级pid。
用法:
os.getPriority( pid )
参数：此方法接受上述和以下描述的单个参数：
- pid:它是一个可选参数，用于指定要返回其调度优先级的进程ID。默认值为0。
返回值：此方法返回一个整数值，该整数值指定由所指定的进程的调度优先级pid。如果进程ID(pid)的值设置为0，则它将返回当前进程的调度优先级。
以下示例说明了Node.js中os.getPriority()方法的使用：
范例1：
// Node.js program to demonstrate the
// os.getPriority() Method
// Require os module
const os = require('os');
// Printing os.getPriority() value
try {
// Printing priority of current process
console.log(os.getPriority());
}catch(err){
console.log(i + ":error occured" + err);
}输出：
0
范例2：
// Node.js program to demonstrate the
// os.getPriority() Method
// Require os module
const os = require('os');
// Accessing ps-list module to
// get process details
const psList = require('ps-list');
// Calling psList function defined
// in ps-list module
psList().then(data => {
// Printing all the process information
// from returned data
console.log(data);
// Itterating through each element
// of the returned data
data.forEach(function(element){
try{
// Getting priority of selected process
var process_priority=os.getPriority(element.pid);
// Printing pid priority and process name
console.log("pid:" + String(element.pid)
+ "\t priority:" + String(process_priority)
+ "\t name:" + String(element.name));
}catch(err){
// There will be error like operation
// not permitted, so omitting error to
// get clean output printing error
// generated from os.getPriority() function
//console.log("pid:"+String(element.pid)+
//"\t priority:error \t name:"
//+String(element.name)); console.log(err);
}
});
});输出：
[ { name:'[System Process]', pid:0, ppid:0 },
{ name:'System', pid:4, ppid:0 },
{ name:'Registry', pid:96, ppid:4 },
{ name:'smss.exe', pid:392, ppid:4 },
{ name:'csrss.exe', pid:640, ppid:624 },
{ name:'wininit.exe', pid:752, ppid:624 },
{ name:'csrss.exe', pid:768, ppid:744 },
{ name:'services.exe', pid:824, ppid:752 },
{ name:'lsass.exe', pid:832, ppid:752 },
{ name:'svchost.exe', pid:956, ppid:824 },
{ name:'WUDFHost.exe', pid:964, ppid:824 },
{ name:'svchost.exe', pid:992, ppid:824 },
{ name:'fontdrvhost.exe', pid:72, ppid:752 },
{ name:'svchost.exe', pid:548, ppid:824 },
{ name:'svchost.exe', pid:868, ppid:824 },
{ name:'winlogon.exe', pid:1104, ppid:744 },
{ name:'fontdrvhost.exe', pid:1164, ppid:1104 },
{ name:'dwm.exe', pid:1240, ppid:1104 },
{ name:'svchost.exe', pid:1300, ppid:824 },
{ name:'svchost.exe', pid:1328, ppid:824 },
{ name:'svchost.exe', pid:1360, ppid:824 },
{ name:'svchost.exe', pid:1376, ppid:824 },
{ name:'svchost.exe', pid:1480, ppid:824 },
{ name:'svchost.exe', pid:1588, ppid:824 },
{ name:'svchost.exe', pid:1640, ppid:824 },
{ name:'svchost.exe', pid:1676, ppid:824 },
{ name:'svchost.exe', pid:1684, ppid:824 },
{ name:'svchost.exe', pid:1740, ppid:824 },
{ name:'svchost.exe', pid:1836, ppid:824 },
{ name:'svchost.exe', pid:1884, ppid:824 },
{ name:'svchost.exe', pid:1948, ppid:824 },
{ name:'svchost.exe', pid:1956, ppid:824 },
{ name:'svchost.exe', pid:2024, ppid:824 },
{ name:'dasHost.exe', pid:2084, ppid:2024 },
{ name:'svchost.exe', pid:2124, ppid:824 },
{ name:'svchost.exe', pid:2184, ppid:824 },
{ name:'svchost.exe', pid:2196, ppid:824 },
{ name:'svchost.exe', pid:2268, ppid:824 },
{ name:'svchost.exe', pid:2360, ppid:824 },
{ name:'atiesrxx.exe', pid:2400, ppid:824 },
{ name:'atieclxx.exe', pid:2496, ppid:2400 },
{ name:'svchost.exe', pid:2504, ppid:824 },
{ name:'svchost.exe', pid:2512, ppid:824 },
{ name:'svchost.exe', pid:2524, ppid:824 },
{ name:'Memory Compression', pid:2588, ppid:4 },
{ name:'svchost.exe', pid:2664, ppid:824 },
{ name:'igfxCUIService.exe', pid:2688, ppid:824 },
{ name:'svchost.exe', pid:2728, ppid:824 },
{ name:'svchost.exe', pid:2736, ppid:824 },
{ name:'svchost.exe', pid:2924, ppid:824 },
{ name:'svchost.exe', pid:2952, ppid:824 },
{ name:'RtkAudioService64.exe', pid:2096, ppid:824 },
{ name:'svchost.exe', pid:2824, ppid:824 },
{ name:'svchost.exe', pid:2820, ppid:824 },
{ name:'svchost.exe', pid:3180, ppid:824 },
{ name:'svchost.exe', pid:3188, ppid:824 },
{ name:'svchost.exe', pid:3264, ppid:824 },
{ name:'svchost.exe', pid:3364, ppid:824 },
{ name:'svchost.exe', pid:3464, ppid:824 },
{ name:'svchost.exe', pid:3500, ppid:824 },
{ name:'svchost.exe', pid:3508, ppid:824 },
{ name:'svchost.exe', pid:3556, ppid:824 },
{ name:'spoolsv.exe', pid:3564, ppid:824 },
{ name:'svchost.exe', pid:3736, ppid:824 },
{ name:'mDNSResponder.exe', pid:3820, ppid:824 },
{ name:'armsvc.exe', pid:3828, ppid:824 },
{ name:'OfficeClickToRun.exe', pid:3840, ppid:824 },
{ name:'IntelCpHDCPSvc.exe', pid:3856, ppid:824 },
{ name:'svchost.exe', pid:3864, ppid:824 },
{ name:'svchost.exe', pid:3884, ppid:824 },
{ name:'esif_uf.exe', pid:3932, ppid:824 },
{ name:'svchost.exe', pid:3940, ppid:824 },
{ name:'wlanext.exe', pid:3948, ppid:3464 },
{ name:'mongod.exe', pid:4028, ppid:824 },
{ name:'MDZkM.exe', pid:4056, ppid:824 },
{ name:'rundll32.exe', pid:4084, ppid:824 },
{ name:'svchost.exe', pid:3076, ppid:824 },
{ name:'rundll32.exe', pid:3068, ppid:4084 },
{ name:'RtkBtAudioServ.exe', pid:3720, ppid:824 },
{ name:'conhost.exe', pid:4108, ppid:3948 },
{ name:'svchost.exe', pid:4116, ppid:824 },
{ name:'SynTPEnhService.exe', pid:4144, ppid:824 },
{ name:'svchost.exe', pid:4152, ppid:824 },
{ name:'MsMpEng.exe', pid:4180, ppid:824 },
{ name:'svchost.exe', pid:4220, ppid:824 },
{ name:'svchost.exe', pid:4228, ppid:824 },
{ name:'svchost.exe', pid:4244, ppid:824 },
{ name:'RtkBtManServ.exe', pid:4604, ppid:824 },
{ name:'svchost.exe', pid:4616, ppid:824 },
{ name:'IntelCpHeciSvc.exe', pid:4624, ppid:824 },
{ name:'svchost.exe', pid:5344, ppid:824 },
{ name:'svchost.exe', pid:5648, ppid:824 },
{ name:'svchost.exe', pid:6064, ppid:824 },
{ name:'svchost.exe', pid:1348, ppid:824 },
{ name:'svchost.exe', pid:1780, ppid:824 },
{ name:'svchost.exe', pid:4092, ppid:824 },
{ name:'NisSrv.exe', pid:6464, ppid:824 },
{ name:'sihost.exe', pid:6716, ppid:1948 },
{ name:'svchost.exe', pid:6724, ppid:824 },
{ name:'svchost.exe', pid:6732, ppid:824 },
... 90 more items ]
pid:0 priority:0 name:[System Process]
pid:6716 priority:0 name:sihost.exe
pid:6724 priority:0 name:svchost.exe
pid:6732 priority:0 name:svchost.exe
pid:6884 priority:0 name:svchost.exe
pid:6988 priority:0 name:taskhostw.exe
pid:6236 priority:-14 name:ctfmon.exe
pid:652 priority:0 name:explorer.exe
pid:6112 priority:-7 name:SynTPEnh.exe
pid:7420 priority:-7 name:SynTPHelper.exe
pid:7744 priority:0 name:svchost.exe
pid:8140 priority:0 name:schtasks.exe
pid:8148 priority:0 name:conhost.exe
pid:7728 priority:0 name:ShellExperienceHost.exe
pid:1804 priority:0 name:SearchUI.exe
pid:7920 priority:0 name:RuntimeBroker.exe
pid:1792 priority:0 name:RuntimeBroker.exe
pid:1264 priority:0 name:SkypeBackgroundHost.exe
pid:1256 priority:0 name:igfxEM.exe
pid:6208 priority:0 name:YourPhone.exe
pid:2368 priority:10 name:SettingSyncHost.exe
pid:8220 priority:0 name:CastSrv.exe
pid:8508 priority:0 name:RuntimeBroker.exe
pid:8864 priority:0 name:RadeonSettings.exe
pid:8916 priority:0 name:RuntimeBroker.exe
pid:2544 priority:0 name:SkypeApp.exe
pid:6812 priority:0 name:RuntimeBroker.exe
pid:2252 priority:0 name:svchost.exe
pid:1144 priority:0 name:smartscreen.exe
pid:7260 priority:0 name:SecurityHealthSystray.exe
pid:7284 priority:0 name:RtkNGUI64.exe
pid:8172 priority:0 name:IDMan.exe
pid:2716 priority:0 name:chrome.exe
pid:5020 priority:0 name:chrome.exe
pid:6004 priority:0 name:chrome.exe
pid:5916 priority:-7 name:chrome.exe
pid:5912 priority:0 name:chrome.exe
pid:5072 priority:0 name:chrome.exe
pid:2132 priority:0 name:chrome.exe
pid:7808 priority:0 name:chrome.exe
pid:9012 priority:0 name:jusched.exe
pid:6520 priority:19 name:chrome.exe
pid:5308 priority:19 name:chrome.exe
pid:8312 priority:0 name:cmd.exe
pid:3016 priority:0 name:conhost.exe
pid:7740 priority:0 name:IEMonitor.exe
pid:1472 priority:0 name:GameBar.exe
pid:292 priority:0 name:RuntimeBroker.exe
pid:1132 priority:0 name:GameBarFT.exe
pid:2224 priority:19 name:chrome.exe
pid:7360 priority:19 name:chrome.exe
pid:1060 priority:19 name:chrome.exe
pid:7816 priority:0 name:chrome.exe
pid:7640 priority:19 name:chrome.exe
pid:7480 priority:19 name:chrome.exe
pid:9016 priority:0 name:jucheck.exe
pid:1996 priority:0 name:notepad++.exe
pid:3248 priority:0 name:WindowsInternal.ComposableShell.Experiences.TextInput.InputApp.exe
pid:4584 priority:19 name:chrome.exe
pid:3540 priority:0 name:chrome.exe
pid:6160 priority:19 name:chrome.exe
pid:7068 priority:0 name:ApplicationFrameHost.exe
pid:8028 priority:0 name:SystemSettings.exe
pid:2752 priority:0 name:PaintStudio.View.exe
pid:6576 priority:0 name:RuntimeBroker.exe
pid:1708 priority:0 name:Calculator.exe
pid:1496 priority:0 name:node.exe
注意：上面的程序将通过使用 node filename.js命令。
参考： https://nodejs.org/api/os.html#os_os_getpriority_pid
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注：本文由纯净天空筛选整理自gekcho大神的英文原创作品 Node.js | os.getPriority() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。