Bug 60030 - /proc doesn't scale.
/proc doesn't scale.
Status: CLOSED WONTFIX
Product: Red Hat Linux
Classification: Retired
Component: kernel (Show other bugs)
7.2
i386 Linux
medium Severity medium
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Assigned To: Arjan van de Ven
Brian Brock
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2002-02-19 01:34 EST by Ed McKenzie
Modified: 2007-04-18 12:40 EDT (History)
0 users

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Doc Type: Bug Fix
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Last Closed: 2003-06-07 21:29:39 EDT
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Attachments (Terms of Use)
top output (2.34 KB, text/plain)
2002-02-19 01:36 EST, Ed McKenzie
no flags Details

  None (edit)
Description Ed McKenzie 2002-02-19 01:34:07 EST
Under high load, top/ps spend excessive time in the kernel, and cease to 
function in a useful way.  On UP, they simply don't work at all beyond a 
certain point; on SMP, you can see why.  See attachment.
Comment 1 Ed McKenzie 2002-02-19 01:36:56 EST
Created attachment 45941 [details]
top output
Comment 2 Arjan van de Ven 2002-02-19 03:56:51 EST
Known issue; top asks the kernel to calculate how much memory there is shared
between processes; that's a rather expensive calculation if you have lots of
processes with shared components...
Comment 3 Ed McKenzie 2002-02-19 08:27:36 EST
Might the rmap patches speed things up at all?
Comment 4 Arjan van de Ven 2002-02-19 08:44:10 EST
Doesn't help too much unfortionatly. top still asks it per process...
sort of the same amount of work that way.

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