Htop displays several lines for single app

ravisghosh · 2007-06-13 13:25:25

Htop shows multiple lines for a single process with different or similar values of memory and cpu usage. I could not find anything in setup or on www to make htop display one app in one line only as it is in top. I am unable to understand the exact memory and cpu usage in htop. Could anyone please give some guidance in either understanding htop or changing its display to one app-one line kind of way.

Last edited by ravisghosh (2007-06-13 13:25:54)

ArchPad · 2007-06-13 14:36:30

The apps displayed are 100% identical? Maybe what you're seeing are similar or associated processes.

lucke · 2007-06-13 14:36:31

It shows threads. According to man, K and H should trigger showing of kernel and userspace threads respectively.

-edit-

There's an option in setup (f2) to hide those threads too, if K/H doesn't work.

Last edited by lucke (2007-06-13 14:38:40)

ravisghosh · 2007-06-13 14:50:39

ya, K/H option is not working. However, selecting the option in setup works. Still there are few apps which are shown in 3 lines, like

/usr/bin/mpd /etc/mpd.conf
/usr/bin/mpd /etc/mpd.conf
/usr/bin/mpd /etc/mpd.conf

lucke · 2007-06-13 15:01:01

Does "ps ax | grep mpd" show it thrice too?

ravisghosh · 2007-06-13 15:22:27

yeh it does.

lucke · 2007-06-13 15:35:00

Then apparently you have three instances of mpd running.

ravisghosh · 2007-06-14 18:08:41

how is that possible. Only one mpd is in rc.conf.

lloeki · 2007-06-14 21:08:50

certainly it (pre)forks so as to handle multiple clients. is the number of mpd equal to the number of client connections + 1 ? see also if there's a 'child' setting in mpd.conf

phrakture · 2007-06-14 22:56:00

Try hitting 't', it will make more sense in a tree-based layout.

ravisghosh · 2007-06-15 02:57:48

in tree view, 3 mpd lines appear something like this

`- /usr/bin/mpd /etc/mpd.conf
     `- /usr/bin/mpd /etc/mpd.conf
          `- /usr/bin/mpd /etc/mpd.conf

All 3 have different mem and cpu values. Does it mean that the latter 2 are child processes?

Also, i htop shows

hald-addon-keyboard: listening on /dev/input/event1
hald-addon-keyboard: listening on /dev/input/event2
hald-addon-keyboard: listening on /dev/input/event3

Does that mean that my box is set up for 3 keyboards and I am wasting system resources!!!

Last edited by ravisghosh (2007-06-15 03:03:29)

lloeki · 2007-06-15 14:02:21

/dev is handled by udev and nodes are created as needed, so you certainly have 3 keyboard-like devices (mouse with special buttons, special keyboard, etc...). nothing to worry, because it doesn't use much resources.

as for mpd, I think there's:
1. the parent, which listens to incoming connections
2. the child, forked on each connection
3. the subchild, forked from the child
I believe 2 and 3 handle different things: eg one handles decoding/playing audio (certainly 3) and the other handles connection to the client (listening to commands, like play pause etc...)

Last edited by lloeki (2007-06-15 14:07:30)

ravisghosh · 2007-06-15 14:07:57

I have a 3 button generic mouse and a 104-key generic keyboard.

lloeki · 2007-06-15 16:49:05

if you want, use:

udevinfo --query=path --name=/dev/input/event0

then with the resulting sysfs path

udevinfo --query=all --attribute-walk --path=/class/input/input0/event0

to get an idea of what they are corresponding to.

on mine these are unused (except the actual keyboard) ps/2 ports on the ps/2 chip.

Last edited by lloeki (2007-06-15 16:49:30)

Arch Linux

#1 2007-06-13 13:25:25

Htop displays several lines for single app

#2 2007-06-13 14:36:30

Re: Htop displays several lines for single app

#3 2007-06-13 14:36:31

Re: Htop displays several lines for single app

#4 2007-06-13 14:50:39

Re: Htop displays several lines for single app

#5 2007-06-13 15:01:01

Re: Htop displays several lines for single app

#6 2007-06-13 15:22:27

Re: Htop displays several lines for single app

#7 2007-06-13 15:35:00

Re: Htop displays several lines for single app

#8 2007-06-14 18:08:41

Re: Htop displays several lines for single app

#9 2007-06-14 21:08:50

Re: Htop displays several lines for single app

#10 2007-06-14 22:56:00

Re: Htop displays several lines for single app

#11 2007-06-15 02:57:48

Re: Htop displays several lines for single app

#12 2007-06-15 14:02:21

Re: Htop displays several lines for single app

#13 2007-06-15 14:07:57

Re: Htop displays several lines for single app

#14 2007-06-15 16:49:05

Re: Htop displays several lines for single app

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