better ps

astura · 02-27-2014, 07:09 AM

Hey, I´ve done some research but was unable to find a program or a solution for my need.
I wanted to have a better output from ps, with more precision from the memory and cpu percentage processes are consuming, any tips?

jdkaye · 02-27-2014, 08:52 AM

Try typing "man ps" in a terminal and you'll see a bunch of options that may be what you're looking for. Your question is a bit vague so it's hard to know if this helps.
jdk

astura · 02-27-2014, 09:57 AM

I´ve done that, the thing is, 0.0% for mem or cpu consumed is to "unprecise" for what I need, I wanted something like 0.00x%

jlliagre · 02-27-2014, 10:15 AM

Can you tell with more details what statistics you would like to be displayed and with which precision. Note that ps cpu values are not that useful, not being the percentage of anything sensible.

astura · 02-27-2014, 10:19 AM

Well, what I want, the best precision CPU and Memory usage from processes, it would be better if they were even summed up if they are similar similar processes, something as "fast" as ps, it could even be absolute values, not necessarily percentage values.
smem is an alternative in memory usage part, but if there was tool that united both cpu and mem it would be best.

jlliagre · 02-27-2014, 10:31 AM

"ps" doesn't report the real CPU usage in the first place, "top", "htop" and similar are doing a better job here.

In any case, all of these tools are getting the kernel statistics by retrieving various /proc pseudo files. It should be easy to display any of the statistics you want with absolute values with a small shell script.

astura · 02-27-2014, 11:18 AM

I was trying to avoid creating a bash script lol, but I guess can´t be done. Thanks a lot.

szboardstretcher · 02-27-2014, 11:21 AM

Well, hold on a second now.

Quote:

better output from ps, with more precision from the memory and cpu percentage processes are consuming

What exactly are you saying that you want?

Do you want the output to be different? If so, just show us the output you are concerned with, and an example of how you want it to look. No need to make a script to do a little bit of data manipulation.

astura · 02-27-2014, 12:50 PM

Quote:

Originally Posted by szboardstretcher

Well, hold on a second now.

What exactly are you saying that you want?

Do you want the output to be different? If so, just show us the output you are concerned with, and an example of how you want it to look. No need to make a script to do a little bit of data manipulation.

I´ve once written this:
ps -eo pcpu,pmem,args --sort=args | grep -v "0.0[ ]*0.0" | awk '{print $1";;"$2";;"$3" "$4" "$5" "$6" "$7" "$8" "$9" "$10" "$11}' | awk -F";;" 'NR==1 {print $1" "$2" "$3} NR!=1 {cpu[$3]+=$1;mem[$3]+=$2}END{for(i in mem){print cpu[i]"\t"mem[i]"\t"i}}'
So I could get all processes "worth" mentioning that were indeed consuming resources, even putting same named processes together, but I thought that perhaps the precision 0.0% wasn´t good enough, so I wanted something like 0.000%, got it now?

szboardstretcher · 02-27-2014, 01:09 PM

Ahh. ok.

Well, you can pull out the numbers from /proc/, they are mostly integers that you will have to do a few readings on to get the deltas, then you can spit out a float of any precision.

fyi, cpu stats are in /proc/stat

but for me, knowing that 99.1 percent of my cpu's are being used is quite enough information for me. I dont see any benefit in knowing that it is 99.138928 percent.

edit: figure i better add some documentation on the /proc/stat file:
http://www.linuxhowtos.org/System/procstat.htm

astura · 02-28-2014, 02:17 PM

to whom it might interest I´ve recompiled ps to my needs

szboardstretcher · 02-28-2014, 02:20 PM

definitely. do you have it up on github or something?