pidusage
Process cpu % and memory use of a PID
Ideas from https://github.com/arunoda/node-usage/ but with no C-bindings
API
var pusage = require('pidusage')
pusage.stat(process.pid, function(err, stat) {
expect(err).to.be.null
expect(stat).to.be.an('object')
expect(stat).to.have.property('cpu')
expect(stat).to.have.property('memory')
console.log('Pcpu: %s', stat.cpu)
console.log('Mem: %s', stat.memory) //those are bytes
})
// Unmonitor process
pusage.unmonitor(18902);
What do this script do?
A check on the os.platform is done to determine the method to use.
Linux
We use /proc/{pid}/stat in addition to the the PAGE_SIZE and the CLK_TCK direclty from getconf() command. Uptime comes from proc/uptime file because it's more accurate than the nodejs os.uptime().
On darwin, freebsd, solaris (tested on 10/11)
We use a fallback with the ps -o pcpu,rss -p PID command to get the same informations.
On AIX
AIX is tricky because I have no AIX test environement, at the moment we use: ps -o pcpu,rssize -p PID but /proc results should be more accurate! If you're familiar with the AIX environment and now how to get the same results as we've got with Linux systems, please help.
#4
Windows
Windows is really tricky, atm it uses the wmic.exe, feel free to share ideas on how to improve this.
Licence
MIT