Strange top(1) output

Jonathan Noack noackjr at alumni.rice.edu
Thu May 12 07:43:38 PDT 2005


On 5/12/2005 8:12 AM, Giorgos Keramidas wrote:
> On 2005-05-12 13:49, Dominic Marks <dom at goodforbusiness.co.uk> wrote:
>>On Thursday 12 May 2005 11:39, you wrote:
>>>That's an option too.  I'm currently trying to get top to display
>>>something like this (80 columns are used for text, so use a slightly
>>>wider terminal to view this properly:
>>>
>>>-------------------------------------------------------------------------------+
>>>last pid: 11090;  load averages:  1.27,  1.26,  0.86    up 0+01:11:11  03:07:43|
>>>71 processes:  3 running, 68 sleeping                                          |
>>>CPU states: 11.2% user,  0.0% nice, 77.1% system,  0.8% interrupt, 10.9% idle  |
>>>Mem: 50M Active, 348M Inact, 70M Wired, 20M Cache, 60M Buf, 6340K Free         |
>>>Swap: 5000M Total, 5000M Free                                                  |
>>>                                                                               |
>>>  PID USERNAME  PRI NICE   SIZE    RES STATE    TIME   WCPU COMMAND/NTHR       |
>>> 4738 root      108    0  1360K   836K RUN      1:28 22.80% find/1             |
>>>  638 giorgos    -8    0 13496K  4672K pcmwr    1:33  1.03% mpg123/1           |
>>>11062 giorgos    96    0  2428K  1520K RUN      0:00  1.54%  top/1             |
>>>-------------------------------------------------------------------------------+
>>
>>If you don't mind I will share my thoughts on these changes.
> 
> Thanks :)
> 
>>>This includes at least the following changes (some not visible):
>>>
>>>  + The entire header line is limited to the window width too.
>>>  + The USERNAME column is hard-limited to 8 characters.
>>
>>This makes me a little uneasy. Its a typical idiom, at least at my Business,
>>to have usernames which are of the form 'firstnamelastname', for this reason
>>they can be quite long and often the first 5-8 characters will be frequently
>>repeated, for example the following contrived names:
>>
>>rogermoore -> rogermoo
>>rogermoody -> rogermoo
>>charlottelane -> charlott
>>charlottedaniels -> charlott
>>
>>[...]
>>If this behaviour could be turned on and off, I'd be very happy.
> 
> Hmmm, not a bad idea.  You have a good point here.
> 
>>>  + When the view is toggled between processes/threads, the NTHR part
>>>    becomes the thread ID of the particular thread.
>>
>>Okay, not really sure what this will look like to me but no need to explain
>>I'll wait until they hit -CURRENT and see for myself.
> 
> Instead of displaying a single named/7 line, which would mean that there
> is a named process with 7 threads, in "thread mode" you would see 7
> lines with named/0, named/1, named/2, ... which would be the thread IDs
> of the distinct threads.

What happens if the command is long enough to overrun the screen?  Is 
the thread information truncated and lost?  I believe this was the 
argument for making a separate column for the thread info.

-- 
Jonathan Noack | noackjr at alumni.rice.edu | OpenPGP: 0x991D8195
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