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RE: Kernel profiles from MIPS64

To: Ulf Carlsson <ulfc@xxxxxxxxxxxxxxxxxxxx>
Subject: RE: Kernel profiles from MIPS64
From: Dimitris Michailidis <dimitris@xxxxxxxxxxxxxxxxxxxx>
Date: Fri, 21 Jul 2000 13:48:33 -0700 (PDT)
Cc: skunx@xxxxxxxxxxxxxxxxxxxx, linux-origin@xxxxxxxxxxx
In-reply-to: <14707.59390.144205.450968@xxxxxxxxxxxxxxxxxxxx>
Organization: SGI
Sender: owner-linux-origin@xxxxxxxxxxx
On 18-Jul-2000 Ulf Carlsson wrote:
> I tried to do profiling on a 32 CPU machine as well, but the machine
> wouldn't let me finish the compiles before it crashed.  Anyway, the
> graphs generated are rather interesting.  Almost 50% of the CPU time
> is in cpu_idle from the compiles on a Origin 2000.  This looks like a
> bug caused that may be caused by the recent generic changes in the
> priority handling.

This is in line with the 421% CPU utilization reported by time.  Are you sure
that kernel builds are parallel enough to keep all 8 CPUs busy?  Otherwise
you'll have idle CPUs giving you a lot of idle time.

-- 
Dimitris Michailidis                    dimitris@xxxxxxxxxxxx

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