CODEWITHSUNDEEP
linuxcpu-usage
Dani Valverde
Dani Valverde

Reputation: 409

How to get CPU usage from related processes?

If I run top -p $(pgrep -d',' scrapy) I get information on the scrapy process, but this process probably triggers other python related processes. How can I get information on these processes as well in real time as the top command does? Thanks,

Dani

Upvotes: 2

Views: 463

Answers (1)

user559633
user559633

Reputation:

What you're looking for is a program or script that will gather the CPU usage of all child processes spawned by scrapy.

If you wanted to script this yourself, you could look at the output of ps -p {scrapy pid} -L to get all the threads spawned by the instantiation of scrapy.

Or, you could chain together a couple Linux commands to have a one-liner:

ps -C scrapy -o pcpu= | awk '{cpu_usage+=$1} END {print cpu_usage}'

ps:

-C specifies the command name to output

-o pcou= tells ps to only display cpu usage

awk:

{cpu_usage+=$1} END loops over the response from ps

{print cpu_usage} will send the sum to STDOUT.

Upvotes: 3

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