Top is a UNIX program that shows system usage in real time.
Questions tagged [top]
171 questions
95
votes
18 answers
Linux "Top" command for Windows Powershell?
I am looking for a PowerShell cmdlet that can provide similar functionality to the Linux Top app. Something that refreshes at some given interval and displays the process list with CPU % util.
I have seen scripts that list CPU % utilization in a…
TimAtVenturality
81
votes
4 answers
Why is the CPU usage reported by top in Linux over 100%?
I've seen the CPU usage go over 100%. How is this possible? Is it because I have four CPU cores, so 100% isn't really the max?
Also, when a program does this, what else can I do in top besides using the k command?
tony_sid
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68
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3 answers
Linux: Is there something similar to "top" for I/O?
My disk often is utilized, but top (and htop, a custom replacement) show nothing suspicious.
Is there a way to sort processes by I/O (more specific: disk) utilization?
EDIT
Found out using iotop that those strange processes are flush-8:16 and…
java.is.for.desktop
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53
votes
1 answer
Why is the "top" command showing a CPU usage of 799%?
I am running a process in a 4 core Ubuntu server. However, the top command shows that the CPU usage is 799% all the time.
How can this be possible? I know for multi-core CPUs, more than 100% CPU usage is expected, but 799% is a really high…
Arpssss
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51
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2 answers
Understanding top command in unix
When I run top -c command on my UNIX box I get the output below:
top - 03:09:34 up 5 days, 6:14, 1 user, load average: 0.00, 0.00, 0.00
Tasks: 175 total, 1 running, 174 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2%us, 0.0%sy, 1.0%ni,…
user2065083
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40
votes
1 answer
How to get `top` for a specific user only?
How can I read top in bash only for one user? I don't want it to display data for other users.
detraveller
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40
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1 answer
Is there `top` for disk usage
How to track disk usage (write/read and other cool stuff) in realtime with fashion of top in the only right system in shell?
It would be cool if it could monitor specific directory.
Szymon Toda
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36
votes
3 answers
iotop complains "CONFIG_TASK_DELAY_ACCT not enabled in kernel" only for specific process
I'm trying to use iotop to determine whether the CPUs are waiting on I/O at any point for a specific program called bwa (it's a next-generation sequence alignment program). If I start iotop without specifying a specific process (-p pid), I get all…
Mark Ebbert
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36
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2 answers
Why does the memory usage in "top" not add up?
I have noticed that sometimes when I run top, the memory usage of each process in the process table does not seem to add up to the total.
For example, in the dump below, top says that I am using 16 Gb of memory. However, the process table only shows…
del
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34
votes
1 answer
Full list of top-like tool family for perfomance monitoring in linux: iftop iotop htop atop more?
Top-like utilities are extremely handful in my work and I want to make sure I am not missing any of them. Please extend the following list of performance monitoring (top-like) family of linux tools:
top - original tool
htop - adds support to…
Yauhen Yakimovich
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33
votes
2 answers
What does TIME+ (cpu time, hundredth) in top mean?
See the example below. Automount is showing 3019:57 in the TIME+ column.
Tasks: 241 total, 1 running, 240 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.7%us, 0.7%sy, 0.0%ni, 98.5%id, 0.0%wa, 0.1%hi, 0.0%si, 0.0%st
Mem: 16435884k total,…
June Bug
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25
votes
6 answers
top command in cygwin?
I am starting to use Cygwin(64) on my Windows 8 laptop, however, the top command is not recognized. I have read online that I need to get the procps package, but it is not available on the 'Cygwin Setup' package selections. How should I go about…
drjrm3
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20
votes
4 answers
Sorted tree view in htop or alternative?
I am running a Debian flavor of Linux, and I use htop to keep track of memory usage, since it is more detailed than top. I can't seem to get it to sort by memory and display process trees at the same time. Is there a way to do this with htop or an…
bright-star
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16
votes
3 answers
Is there a way to show windows processes in Cygwin constantly
I would like to monitor processes from a cygwin shell, using top or a variant. The reason for this is its realtime reporting and constant updates. However under cygwin, top will not report on windows processes.
Teh forums I have been to recommend…
Husman
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16
votes
3 answers
cpu load measure with hyperthreading on linux
How can I get the true usage of a multicore hyperthreading enabled cpu?
For example lets consider a 2 core CPU, expressing 4 virtual cores.
A single threaded workload would now show up as 100% in top, as one core of the virtual cores is completely…
dronus
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