Top is a UNIX program that shows system usage in real time.

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What's the equivalent of top -H -p <pid> on OS X?

I need to monitor the CPU usage of threads created by a given process. In *nix one can use top -H -p <pid>, but that not available in OS X. An equivalent of ps -eLo ...
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21 views

Find location of process running in top command

When I run 'top' I see a process running named "watchdog" I read up on watchdog via the man page ala Google but I don't have that program installed. I've done a whereis and checked the /dev file to no ...
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20 views

Gnome 3 on openSuse 42.1 : “sleep 1” Command High CPU Usage

I am experiencing intense cycles of high CPU usage on my openSuse laptop. I have noticed my browser intermittently freezing up (and my fan speeding up) and I checked htop and this is what it looks ...
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How to choose columns for top command in batch mode?

$ top -bn1 | head top - 15:16:52 up 11 days, 5:01, 4 users, load average: 0,00, 0,03, 0,11 Tasks: 411 total, 1 running, 408 sleeping, 0 stopped, 2 zombie %Cpu(s): 4,5 us, 0,6 sy, 0,0 ni, ...
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49 views

What kswapd is doing when there is no swap

The top look like this: KiB Mem : 3989652 total, 30976 free, 1480440 used, 2478236 buff/cache KiB Swap: 0 total, 0 free, 0 used. 2276236 avail Mem PID USER PR NI ...
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30 views

Linux top (procps) discrepancy in numbering of CPUs for process list vs summary

I am using the top utility on a CentOS 6.7 system (procps version 3.2.8) and am observing inconsistent numbering in its output. My box has an Intel(R) Xeon(R) CPU E5-2690 v2 which has 10 cores with ...
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69 views

how do I get the PID list and USERNAME of each of those PIDs in LINUX using python?

I am trying to get the PID's and their respective usernames for displaying something similar to the top command in linux. I managed to get the list of PIDs but I am unable to fetch any username for ...
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29 views

High load after killing processes

My Linux home server (a RPi 2 with Raspbian) had a script running every 5 minutes from a cron job (an old rpi2pachube.sh). It usually runs a Transmission daemon. I just discovered that that script ...
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36 views

Using `top` to output only the running processes, PIDs and users?

I'd like to run top -n 1 so that it only outputs a list of running processes, their PIDs and the user that has run them (the "COMMAND", "PID" and "USER" columns). I don't need any of the other ...
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78 views

Should I trust htop or top when it comes to RES memory?

I am writing a program to test some memory usage metrics on our systems and I want to hit a target memory consumption. You execute my program via meminflate.exe -G 103.1 if you want to take up 103.1 ...
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284 views

What would cause a high `%wa` value when there is nothing performing heavy io?

I have a 92.3%wa value on top right now under linux and when I run iotop -a, I see nothing causing heavy io. What might be the cause of the large %wa value and how can I go about diagnosing this? The ...
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52 views

how to check how much memory processes take?

As we know in Linux machines, we have RAM memory and swap memory. My first question is: What is the reason that the swap memory is increasing – because high level of using the RAM memory or ...
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103 views

Find *where* the executable is for a currently running process

If I have 2 executables (/path/to/gcc/myapp.exe, and /path/to/intel/myapp.exe) where one is compiled with an intel compiler and one is compiled with standard gcc, running both will show up in top as ...
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51 views

Why Menu Meter and htop report inconsistent occupied memory and total memory?

On my Macbook Pro running OS X 10.10.3, Menu Meter and htop seem to be reporting inconsistent memory results:
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22 views

How can I safely remove timeout from a script?

I started a script with timeout --signal 2 --kill-after 10 14400 and now decided that it should rather run as long as it must, so I need to remove that timeout from the running script. top -p ...
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40 views

Top -l returning always 0.0 CPU usage when requesting single PID

On Mac OS X 10.9 (Mavericks) & 10.10 Yosemite I’m unable to get the correct CPU usage for a single process using the top -l command for example top -l 1 -ncols 3 -pid <pid> Even though I ...
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2answers
38 views

how to make top show multiple CPUs (no toggling)

Is there any way to make top show multiple CPUs by default? I know how to toggle (1) But I'm running it on batch mode and the output is redirected to a file.
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65 views

How much time does top command consider while finding CPU usage percentage? [duplicate]

Top gives me an output like: %Cpu(s): 4.7 us, 1.3 sy, 0.0 ni, 93.9 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st if my CPU has spent 4.7% of its time on user processes, how much of time history has it ...
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37 views

How to know, which process had accessed the harddrive last time and when?

How to know, which process had accessed the harddrive last time and when? Like ntopng with "last seen", but in local? The question is about Linux.
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513 views

linux - is there a more advanced version of top?

Is there any type of super-top command that will show the results through time? With regular top, it will tell me for an instant what processes are using what, but is there anything that will show ...
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174 views

Low load average with plenty of cpu-intersive processes

I see loadavg at about 1 with at least 3 processes running at full tile. How can that be? top - 11:48:32 up 147 days, 5:38, 8 users, load average: 1.08, 1.11, 1.05 Tasks: 416 total, 4 running, ...
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171 views

Iostat and top show static resource usage on first value

For one of my projects, I need to obtain resource (CPU, I/O and disk-space) usage programatically. Currently I'm running shell commands (iostat) and parsing the results which works relatively well ...
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602 views

How to install top & htop on Ubuntu 8.04.2 LTS (hardy)

Env. Rackspace Ubuntu 8.04.2 LTS (hardy) I am in a corner situation where I need to maintain carefully a legacy server before I can plant for an upgrade. Actually an upgrade is not an option, I ...
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77 views

How to save the output from top/atop

I wanted to know if there a way to save the output from top or atop commands into a textfile for later processing. atop|top > output.txt is not really working at both top and atop keep running in ...
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143 views

Weird output from linux `top` command

I got a weird output from command top, which shows the summation of the RES column is greater than my physical memory. For instance, I have a host with 64G physical memory and the swap partition has ...
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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 ...
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56 views

What is the point of sorting by PID and username in top?

I've been using the top program to find the most CPU and memory hungry programs on linux systems. Only recently did I discover the multi-window mode. The default windows number 2 (teal) and 4 (yellow) ...
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350 views

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 ...
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377 views

99% used memory, but 70% of unused allocated memory and 97% swap available: what can I do?

In a server with 48GB of RAM, when I run top, I see that less than 500 MB are free (1%), whereas when I sum up the column of % of memory used by each process, it is around 30%. Since only the 2.7% of ...
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812 views

How to use the top command in Unix to only see process using more than 10% CPU?

I want to use top, but not see all of the processes that are using minute chunks of computing power. Can someone tell me how to use top to see things above a certain cpu % cutoff? I tried just using ...
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102 views

top output Time+ information misleading

I am running SuSE 11.2. Shen I am running "top" command on one of my machine, it looks like this: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ...
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Redirecting top when multiple CPU's shown

If you run top, and then press 1, it shows the breakdown of usage on each CPU. How can I redirect this to a file? I know I can do top -n 1 > process.txt but how can I get the 1 option in the ...
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343 views

RAM size mismatch: top/htop vs dmidecode

I've got lenovo ideapad Y530. According to dmidecode, I should have 3GB RAM: tomasz@tomasz-lenovo-ideapad-Y530:~$ sudo dmidecode --type memory [sudo] password for tomasz: # dmidecode 2.9 SMBIOS 2.4 ...
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347 views

pidstat -u -I shows cpu usage 385%

I have a guest running in qemu doing linux kernel compilation. From host, I am watching its usage with below command pidstat 4 -p pid_of_process -u -I -I flag should average out for all number of ...
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67 views

In the linux top program, what does the z option indicate

I'm trying to understand the top program better, and I don't really get the 'z' option which highlights all running processes. Wouldn't all processes in top be considered running? In what context ...
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667 views

Is using top a robust way of measuring system CPU usage?

I got confused while reading this question on stack overflow. The asker says: "'top' will simply not do, as there is a delay between cpu dumps, it requires 2 dumps and several seconds, which hangs ...
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1k views

Why is the kernel and the watchdogs consuming all the CPU?

I run a bunch of heavy user space processes on a powerful Xeon machine (32 virtual processors according to /proc/cpuinfo). The CPU load is normally around 30 and the machine feel responsive, but later ...
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130 views

Top missing some processes

I'm getting weird behavior using top in Arch Linux. When filtering by user (fred) I get a different list of processes depending on the sort order. In descending PID order: PID USER %CPU %MEM ...
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1k views

ps and top give different CPU usage

I've seen a few posts similar to this, most notably here, but wasn't quite satisfied with the answers. I'm comparing top and ps results on a specific process and see huge discrepancies in CPU usage. ...
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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 ...
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191 views

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.
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188 views

How to read 'top' results

I am running a software and while it is running, I want to know how much CPU usage or RAM it occupies... along with maybe other things that could be interesting. For that purpose, I need to know ...
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637 views

Monitoring CPU usage of Virtualbox with top

I'm using the top command in Linux to keep a close eye on Virtualbox which is running a VM. The current CPU in the server is a Quad Core Xeon processor 3.3 Ghz and I have only assigned one core to ...
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3k views

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 ...
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730 views

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 ...
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472 views

Is my top statement saying my asterisk server is using too much resources?

I installed an asterisk server on my VPS with linode. I have 1 GB of ram. I'm not sure what kind of CPU is in use. I decided to test the number of concurrent calls my system can handle. So I used ...
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507 views

The outputs of ps and top do not match

I have a situation where I have a process, say script.pl (here it is), which seems to stick around in the output to ps auxw | grep script.pl, sometimes when load is heavy it sticks around for several ...
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618 views

How to identify what is causing sys% in top?

top on one of hex cores with hyper threading shows the following Cpu0 : 2.3%us, 58.8%sy, 0.0%ni, 38.2%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 4.7%us, 62.1%sy, 0.0%ni, 31.2%id, 0.7%wa, ...
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2k views

Top command cache vs free memory

When I am running top command (on embedded system with 64 MB RAM) I am getting below description on total memory usage: "Mem: 43468K used, 968K free, 0K shrd, 1280K buff, 21896K cached" It looks ...
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Where does top command get all the data for CPU Utilization?

When I run the top command, the third line is; Cpu(s): 0.3%us, 0.3%sy, 0.0%ni, 99.2%id, 0.1%wa, 0.0%hi, 0.0%si, 0.1%st From where does top command get this data? Does it get from /proc?, if ...