linux-kernel - Re: Oprofile [still] doesn't work on 2.6.28-rc4 on certain CPU

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Message-ID: <alpine.LNX.1.10.0811141208460.19853@jikos.suse.cz>
Date:	Fri, 14 Nov 2008 12:12:01 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Robert Richter <robert.richter@....com>
cc:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	oprofile-list@...ts.sf.net, Jiri Benc <jbenc@...e.cz>,
	Vilem Marsik <vmarsik@...e.cz>,
	Eric Dumazet <dada1@...mosbay.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	linux-kernel@...r.kernel.org
Subject: Re: Oprofile [still] doesn't work on 2.6.28-rc4 on certain CPU

On Fri, 14 Nov 2008, Robert Richter wrote:

> Could you at least test with v2.6.27? 

Oprofile in 2.6.27 doesn't work on this system, as far as I know.

> I could not reproduce it on the hardware I am using.

Yes, it seems to be very system-specific. As I have said in my original 
mail, the machine we are seeing this problem on is

        vendor_id       : AuthenticAMD
        cpu family      : 15
        model           : 47
        model name      : AMD Athlon(tm) 64 Processor 3000+
        stepping        : 0

but on the other hand on the following CPU, the oprofile works with 2.6.27 
and 2.6.28-rc4 without any problems, NMIs are coming flawlessly

        vendor_id       : AuthenticAMD
        cpu family      : 15
        model           : 4
        model name      : AMD Athlon(tm) 64 Processor 3000+
        stepping        : 8


-- 
Jiri Kosina
SUSE Labs
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