linux-kernel - Re: [git-pull -tip] x86: Basic AMD Support for performance counters

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Date:	Sun, 1 Mar 2009 12:30:10 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Jaswinder Singh Rajput <jaswinder@...nel.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	x86 maintainers <x86@...nel.org>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: [git-pull -tip] x86: Basic AMD Support for performance counters


* Jaswinder Singh Rajput <jaswinder@...nel.org> wrote:

> On Sun, 2009-03-01 at 09:36 +0100, Ingo Molnar wrote:
> > * Ingo Molnar <mingo@...e.hu> wrote:
> > 
> > > Seems to be working fine, here's the output from an Athlon 64 
> > > 3200+ (Sempron) box:
> > > 
> > >  Performance counter stats for 'ls':
> > > 
> > >       17.420811  task clock ticks     (msecs)
> > > 
> > >               0  CPU migrations       (events)
> > >              12  context switches     (events)
> > >             583  pagefaults           (events)
> > >        29760299  CPU cycles           (events)
> > >        29401642  instructions         (events)
> > >        12698498  cache references     (events)
> > >           66269  cache misses         (events)
> > > 
> > >  Wall-clock time elapsed:   687.999988 msecs
> > 
> > The patches cause a crash on another system - an Opteron system 
> > spontaneous reboots at this point during early bootup:
> > 
> > CPU 0/0x4 -> Node 0
> > tseg: 00cfe00000
> > CPU: Physical Processor ID: 0
> > CPU: Processor Core ID: 0
> > using C1E aware idle routine
> > AMD Performance Monitoring support detected.
> > ... num counters:    4
> > ... value mask:      0000000000000000
> > ... fixed counters:  0
> > ... counter mask:    000000000000000f
> > ACPI: Core revision 20081204
> > ftrace: converting mcount calls to 0f 1f 44 00 00
> > ftrace: allocating 16365 entries in 129 pages
> > Setting APIC routing to physical flat
> > masked ExtINT on CPU#0
> > ENABLING IO
> > [reboot]
> > 
> 
> Can you please share your config file.

any config file will crash that box. I used the 64-bit defconfig 
- i.e. 'make ARCH=x86_64 defconfig'.

	Ingo
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