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Re: Oprofile on sibyte 2.4.18 kernel

To: "Shanthi Kiran Pendyala (skiranp)" <skiranp@cisco.com>
Subject: Re: Oprofile on sibyte 2.4.18 kernel
From: Ralf Baechle <ralf@linux-mips.org>
Date: Sat, 8 Apr 2006 00:20:08 +0100
Cc: linux-mips <linux-mips@linux-mips.org>
In-reply-to: <5547014632ED654F971D7E1E0C2E0C3E018DAFBB@xmb-sjc-215.amer.cisco.com>
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References: <5547014632ED654F971D7E1E0C2E0C3E018DAFBB@xmb-sjc-215.amer.cisco.com>
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On Fri, Apr 07, 2006 at 01:38:54PM -0700, Shanthi Kiran Pendyala (skiranp) 
wrote:

> Did anyone port oprofile to 2.4.x kernel on sibyte ?.
> 
> Looking over the mailing list threads it looks like it has been given up
> as a lost cause.

Correct.  So if at all you would have to rip oprofile from the 2.6 kernel
and bolt that code back into the old kernel which would seem doable.  The
MIPS bits certainly don't rely on much 2.6 infrastructure.

> But business reasons require us to work with 2.4.18 kernel for the next
> 9-12 months and We really would like explore a port.

You at least want a newer 2.4 variant; 2.4.18 is now over 4 years old, is
from before the point where 2.4 really became stable and contains a number
of security revelant holes.

> Or are there other tools that I can use ?

Gprof, perfex 2 - not sure if the MIPS port of it was ever published though.
But nothing really that provides the same kind of information as oprofile.

  Ralf

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