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Bug 5092 - top gives incorrect %CPU information on SMP machines
top gives incorrect %CPU information on SMP machines
Product: Red Hat Raw Hide
Classification: Retired
Component: procps (Show other bugs)
i386 Linux
medium Severity medium
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Assigned To: Michael K. Johnson
Depends On:
  Show dependency treegraph
Reported: 1999-09-12 14:59 EDT by Jeremy Katz
Modified: 2008-05-01 11:37 EDT (History)
0 users

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 1999-10-04 17:38:31 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Jeremy Katz 1999-09-12 14:59:10 EDT
With procps-2.0.3-1 as included in Lorax 6.0.55, top's
behavior has changed such that %CPU gives the share of CPU
time of one processor since the last screen updated.

From man top(1)
%CPU The task's share of the CPU time since the last
screen update, expressed as a percentage of total CPU time.

I believe that this is caused by the change in determination
of HZ in proc/sysinfo.c
Comment 1 Jeff Johnson 1999-09-12 18:42:59 EDT
This should be fixed in the Raw Hide procps-2.0.3-1. Please reopen
this bug if not.
Comment 2 Jeff Johnson 1999-09-12 18:44:59 EDT
Whoops, this is still a problem in procps-2.0.3-1.
Comment 3 Michael K. Johnson 1999-09-19 20:44:59 EDT
The bug is in the man page.  People report this as a bug whichever
way it works...
Comment 4 Jeremy Katz 1999-10-02 22:20:59 EDT
The man page describes the behavior exhibited by top in
procps-2.0.4-2.  As far as I'm concerned, this bug can be closed.
Comment 5 Michael K. Johnson 1999-10-04 17:38:59 EDT

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