Re: [Xen-devel] RE: AMD Phenom II 940: Upgrade to 2.6.32.12 fixes it and upgrades CPU from 3.1Ghz to 1.2Thz!

[Gerry Reno <greno@xxxxxxxxxxx>]

"...and I'm not sure what Xen bits you are testing with."

I'm using Xen 4.0.0-rc8.  Kernel is 2.6.32.12.

-Gerry



On 05/10/2010 12:40 PM, Dan Magenheimer wrote:
> > > > > enlighten.c, 'd0 domain attempted wrmsr', 'Detected 1226681.732 MHz
> > > > > processor.'(a 1.2 TeraHz processor??? - the processor is actually a
> > > > >            
> > 3.1
> >      
> > > I'm wondering if this bothers delay loop timings, etc. ???
> > >        
> > Dan, thoughts?
> >      
> This info is obtained from Xen via the shared_info struct, so
> I'd bet the shared_info struct is getting trashed.
>
> Or, for awhile, Jeremy had some code that made it possible
> for pvclock to use multiple shared_info structs to detect
> TSC skew.  I think that got pulled for 4.0, but not sure
> I remember why (or the symptoms)... and I'm not sure what
> Xen bits you are testing with.
>
>    
> > -----Original Message-----
> > From: Konrad Wilk
> > Sent: Monday, May 10, 2010 10:17 AM
> > To: Gerry Reno; Dan Magenheimer
> > Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: AMD Phenom II 940: Upgrade to 2.6.32.12 fixes it and upgrades
> > CPU from 3.1Ghz to 1.2Thz!
> >
> > On Mon, May 10, 2010 at 12:03:09PM -0400, Gerry Reno wrote:
> >      
> > > On 05/10/2010 10:10 AM, Konrad Rzeszutek Wilk wrote:
> > >        
> > > > > Ok, I tried to adjust bridge parameters and found that I can
> > > > >            
> > finally get
> >      
> > > > > pv_ops dom0 to boot in normal timeframe if I comment out all bridge
> > > > > related statements in /etc/xen/xend-config.sxp.  Before with
> > > > >            
> > 2.6.31.6 I
> >      
> > > > > had (network-script network-bridge) and also tried (network-script
> > > > > 'network-bridge bridge=br0') but these do not work with 2.6.32.12.
> > > > >
> > > > >            
> > > > I had this problem when I forgot to have 'CONFIG_BRIDGE' enabled in
> > > >          
> > my
> >      
> > > > .config, and also CONFIG_TAP (but I think that was only used during
> > > > guest startup) but I don't think that is your problem. It could be
> > > >          
> > related to
> >      
> > > > this:
> > > >
> > > > "init: eucalyptus-network (eth0) main process (1156) killed by TERM
> > > >          
> > signal"
> >      
> > > > which might have mangled the eth0? Why is it being killed?
> > > >
> > > >          
> > > I'm going to investigate this but I suspect it dies because eth0
> > >        
> > isn't
> >      
> > > there.  The euca network works fine after I restart networking.
> > >        
> > Uh, why isn't eth0 there? The kernel log looks to have 'eth0' setup.
> > Did
> > it get renamed?
> >      
> > >        
> > > >          
> > > > > However, there are still errors in the pv_ops dom0 2.6.32.12
> > > > >            
> > console
> >      
> > > > > output so I'm attaching the output so someone could see if they are
> > > > > serious or if there are workarounds to improve things.  I'm seeing
> > > > > things like 'unable to locate IOAPIC for xxx', call trace from
> > > > >
> > > > >            
> > > > Don't worry about that. These are used to setup the GSI and there is
> > > >          
> > a
> >      
> > > > second code path that does that.
> > > >
> > > >          
> > > Ok.  But then why bother writing these scary messages that just
> > >        
> > confuse
> >      
> > > things?
> > >        
> > Well, you know.. job security and such :-)
> >
> > But in all seriousness - I was thinking about doing something about
> > those pesky messages, but haven't yet come up with a good way of doing
> > it.
> >
> >      
> > >        
> > > >          
> > > > > enlighten.c, 'd0 domain attempted wrmsr', 'Detected 1226681.732 MHz
> > > > > processor.'(a 1.2 TeraHz processor??? - the processor is actually a
> > > > >            
> > 3.1
> >
> > Maybe you should look in a lead case. You know at that speeds your
> > CPU might be producing X-rays that could be harmful to you.
> >
> >      
> > > > > GHz processor), 'No compatible ACPI _PSS objects found.'.
> > > > >
> > > > >            
> > > > Interesting. My AMD prototype board shows the same data (or
> > > >          
> > sometimes
> >      
> > > > even higher number)- completly bogus.
> > > >
> > > >          
> > > I'm wondering if this bothers delay loop timings, etc. ???
> > >        
> > Dan, thoughts?
> >
> >      
> > >        
> > > > > Plus, why do I see slightly different outputs on the consoles?
> > > > >            
> > Some
> >      
> > > > > errors only show on one of the consoles but not the other.
> > > > >
> > > > >            
> > > > That is b/c the Xen console (all prefixed with XEN) shouldn't by
> > > >          
> > default
> >      
> > > > be in the Linux domain, unless requested.
> > > > .. snip..
> > > >
> > > >          
> > > > > (XEN) Command line: dummy=dummy dom0_mem=1024M  vga=text-80x50
> > > > >            
> > loglvl=all guest_loglvl=all sync_console console_to_rin1
> >      
> > > > >            
> > > >          
> > ^'g'
> >      
> > > > or unless you use console_to_ring at which point all of the output
> > > > should be synced together. Except that you have '1' at the end
> > > >          
> > instead
> >      
> > > > of 'g'.
> > > >
> > > >          
> > > The '1' is an artifact due to the command line actually being
> > >        
> > truncated.
> >      
> > > It's actually the last character on the line.
> > >        
> > Ah, OK.
> >      
> > >        
> > > > .. snip..
> > > >
> > > >          
> > > > > GR: now login prompt shows up immediately:
> > > > >
> > > > >            
> > > > Hurrayy!
> > > >
> > > >          
> > > Yeah, no kidding!  :-)
> > >
> > > Thanks for the help and looking at this.
> > >        
> > Of course.
> >      
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>    
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