Tagged Questions

2
votes
3answers
262 views

Kill ssh session and/or stuck processes

I'm developing with vi over ssh. My problem is that sometimes I get my ssh connection killed because of my poor wifi connection and previous processes (like "top", "rails c", etc...) are not being ...
0
votes
1answer
146 views

How does cpu speed stepping effect the cpu usage percentages reported in (for example) htop?

How does cpu speed stepping effect the cpu usage percentages reported in (for example) htop? How about the normal top? So, if my cpu is stepped down to 800mhz with a full speed of 2ghz, does 5% used ...
7
votes
4answers
2k views

Zombie process using 100% CPU

A zombie process, which should not be using any resources (RAM and CPU), is hogging up an entire core on my 8-core 64-bit Ubuntu 11.10 Desktop installation. This is the output of ps -el|grep Z: F S ...
1
vote
0answers
118 views

Is it normal to overworking of just one CPU when using openMP

When I use OpenMP in FORTRAN to parallelize a program on linux, ' top' command show me just one processor working ~%800 instead of ~%100 x 8 processors. Is it a expected situation ?
2
votes
1answer
2k views

Understanding top output in Linux

I'm trying to determine the CPU usage of a program by looking at the output from Top in Linux. I understand that %us means userspace and %sy means system/kernel etc. But say I see 100%us. Does this ...
3
votes
2answers
504 views

%CPU for a process

Looking at the output of top on our server, one of my colleagues told me that the fact that some processes got less than 100 "%CPU" was because I was running too many processes. He added that based on ...
3
votes
1answer
2k views

Cpu usage in the output of top

I am looking at the output of top. top - 16:11:19 up 31 days, 2:37, 10 users, load average: 17.01, 16.99, 17.00 Tasks: 470 total, 18 running, 452 sleeping, 0 stopped, 0 zombie ...
2
votes
1answer
3k views

average load and total %CPU in top

I thought the average load by uptime and the summation of %CPU of all running processes in top (#9 column) should agree. But it seems not true. Here is my little experiments: On one server: $ top -b ...