Bug 60030 - /proc doesn't scale.
Summary: /proc doesn't scale.
Keywords:
Status: CLOSED WONTFIX
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 7.2
Hardware: i386
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2002-02-19 06:34 UTC by Ed McKenzie
Modified: 2007-04-18 16:40 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2003-06-08 01:29:39 UTC
Embargoed:

Attachments (Terms of Use)
top output (2.34 KB, text/plain)
2002-02-19 06:36 UTC, Ed McKenzie 		no flags Details
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Description Ed McKenzie 2002-02-19 06:34:07 UTC 
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 06:36:56 UTC 
Created attachment 45941 [details]
top output
Comment 2 Arjan van de Ven 2002-02-19 08:56:51 UTC 
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 13:27:36 UTC 
Might the rmap patches speed things up at all?
Comment 4 Arjan van de Ven 2002-02-19 13:44:10 UTC 
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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