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mix32
n00b
Joined: 20 Nov 2005
Posts: 16
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 Posted: Tue Dec 27, 2005 9:55 pm Post subject: ps and threads |
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| When I type "ps" multi-threaded programs appear several times, as if they were separated processes. I'd like to see only one line per process (some other distros do it). Is it possible? |
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Jake
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Joined: 31 Jul 2003
Posts: 1132
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| Posted: Tue Dec 27, 2005 10:13 pm Post subject: |
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| Are you sure you're seeing multiple threads and not multiple processes? My "ps" only shows threads with H, -L, -T, m, and -m, the behavior documented in the man page. Otherwise each line displays a unique PID. Please provide an example. |
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anonybosh
Guru
Joined: 20 Nov 2005
Posts: 324
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| Posted: Tue Dec 27, 2005 10:16 pm Post subject: |
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One possible way to do this (though it does drop most info, and includes the CMD from the top description) is:
| Code: | # ps -A|gawk '{print $4}'|sort|uniq
CMD
agetty
ahc_dv_0
aio/0
aio/1
apache2
apcupsd
bash
cron
...
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Rather worthless, yet shows you a list of what's running. |
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mix32
n00b
Joined: 20 Nov 2005
Posts: 16
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| Posted: Wed Dec 28, 2005 12:26 am Post subject: |
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| Jake wrote: | | Are you sure you're seeing multiple threads and not multiple processes? My "ps" only shows threads with H, -L, -T, m, and -m, the behavior documented in the man page. Otherwise each line displays a unique PID. Please provide an example. |
Well, for example ps shows multiple instances of xmms or mozilla-firefox (which are multi-threaded apps) |
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Jake
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Joined: 31 Jul 2003
Posts: 1132
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| Posted: Wed Dec 28, 2005 12:55 am Post subject: |
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| mix32 wrote: | | Well, for example ps shows multiple instances of xmms or mozilla-firefox (which are multi-threaded apps) |
Like this?
| Code: | $ ps mx
...
8491 ? - 0:20 /usr/bin/xmms --sm-client-id 117f00000100010973926310
- - Rsl 0:20 -
- - Ssl 0:00 -
- - Ssl 0:00 -
...
8607 ? - 18:20 /opt/firefox/firefox-bin
- - Sl 18:09 -
- - Sl 0:02 -
- - Sl 0:07 -
- - Sl 0:00 -
- - Sl 0:00 -
- - Sl 0:00 -
- - Sl 0:00 -
... |
instead of
| Code: | $ ps x
...
8491 ? Ssl 0:20 /usr/bin/xmms --sm-client-id 117f00000100010973926310
...
8607 ? Sl 18:21 /opt/firefox/firefox-bin
... |
Do you have any aliases (look for ps in "alias" output) or envoronment variables (look for anything containing PS in "env" output) that might be affecting output? |
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mix32
n00b
Joined: 20 Nov 2005
Posts: 16
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| Posted: Wed Dec 28, 2005 1:27 am Post subject: |
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No, I don't have any aliases or environment variables containing ps. This is what i get:
$ ps -A u |grep xmms
- 6859 7.3 2.4 32876 6812 pts/0 S 02:23 0:00 xmms
- 6860 0.0 2.4 32876 6812 pts/0 S 02:23 0:00 xmms
- 6861 0.0 2.4 32876 6812 pts/0 S 02:23 0:00 xmms
- 6862 0.0 2.4 32876 6812 pts/0 S 02:23 0:00 xmms
- 6864 0.0 0.1 1560 468 pts/0 S+ 02:23 0:00 grep xmms
And:
$ ls /proc/6859/task/
6859 |
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PowerFactor
Veteran
Joined: 30 Jan 2003
Posts: 1693
Location: out of it
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| Posted: Wed Dec 28, 2005 1:51 am Post subject: |
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| Seeing a separate process for every thread in ps is normal with the old linuxthreads library. If you add nptl to your USE flags and recompile glibc you should get the behavior you've seen in other distros. |
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mix32
n00b
Joined: 20 Nov 2005
Posts: 16
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| Posted: Wed Dec 28, 2005 12:01 pm Post subject: |
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| PowerFactor wrote: | | Seeing a separate process for every thread in ps is normal with the old linuxthreads library. If you add nptl to your USE flags and recompile glibc you should get the behavior you've seen in other distros. |
It worked! Thanks. |
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