Re: [Wear-Hard] Re: [Wear-Hard] Re: longrun utility error

From: Francois Gurin <
>
Date: Wed, 15 Jan 2003 00:04:22 -0500

i wouldn't spend more time with the kernel just yet, cpuid 
appears to be working.  try an strace of longrun to see if 
it sheds any light on the failure.  from the error  cited 
below, i'd venture longrun can't parse the input.  looking 
at the debian changelog for longrun 0.9-7 shows:
  * fix pread(),pwrite() offset problem, closes: #165781

this may have something to do with your problem.  in fact, 
checking out the bug report (below) shows the exact same 
error message.  i don't know if this fix is in the latest
upstream version, but you can always grab the debian package
or just the diff and rebuild from there.  hope this helps.

http://bugs.debian.org/cgi-bin/bugreport.cgi?archive=no&bug=165781

--francois

On Tue, Jan 14, 2003 at 10:15:50PM -0500, Rick Jones wrote:
> I'm using RH8.0 kernel 2.4.18.. I gave read and write
> permissions 666 to /dev/cpu/0/cpuid.  I can read
> the string you mentioned from cpuid.  However, I am
> still getting the error "longrun: error reading
> /dev/cpu/0/cpuid: Invalid argument"
> 
> I've tried it with both kernels (msr/cpuid as static
> or modules).  I'm rebuilding the static kernel for
> devfs.  I'll post more after I get it done and tested.
> 
> Any ideas feel free to reply..
> 
> Rick
> 
> 
>  --- Francois Gurin <> wrote: > 
> > what kernel version are you running? occasionally a
> > build of 2.4.20 will
> > compile but otherwise not actually init either cpuid
> > or msr.  i've also 
> > had an instance of longrun just refusing to read the
> > device.
> > 
> > a quick check is to cat cpuid.  be sure you have
> > read permision on the node
> > and you should see somthing like GenuMx86ineTC with
> > some garbage.  
> > 
> > if you don't get anything, try enabling devfs &
> > devfsd and try again.  
> > 
> > devfs will give an idea of what's going on.  if
> > neither cpuid or msr nodes
> > appear, the kernel isn't loading them properly.  if
> > cpuid is blank, then 
> > i don't know what to tell you.
> > 
> > if you do see the GenuMx86ineTC string, make sure
> > you have read and write
> > access to the nodes, as longrun needs to write to
> > the devices.
> > 
> > this should hopefully give you an idea of what's
> > failing and where.
> > 
> > --francois
> > 
> > On Mon, Jan 13, 2003 at 10:49:13PM -0500, Rick Jones
> > wrote:
> > > I did some different things..  
> > > 
> > > I removed the msr and cpuid from /dev/cpu/0 and
> > tried
> > > the kernel with the static msr and cpuid   - same
> > > error msg.   I ran the MAKEDEV again and tried it
> > > again with the modular kernel - same error msg.
> > > 
> > > What do I need to do to read the info in
> > > /dev/cpu/0/cpuid?  Or better trace the cpuid
> > > communication in the static kernel..
> > > 
> > > Rick
> > > 
> > >  --- Rick Jones <> wrote: > I
> > just
> > > rebuilt msr and cpuid in the kernel.  I had
> > > > previously run the MAKEDEV script.  Do I need to
> > do
> > > > some clean up on the dev directories?
> > > > 
> > > > I'm using a Crusoe 5400  - I don't know if that
> > > > effects the major number (in the script) for the
> > > > CPUID..
> > > > 
> > > > Rick
> > > > 
> > > > 
> > > >  --- Doug <> wrote: >
> > Sounds
> > > > like the device files are not created. I
> > > > > believe
> > > > > there is Makedev script that you need to run
> > to
> > > > > create
> > > > > those. It should be in the longrun
> > distribution.
> > > > > What I
> > > > > do is compile CPUID and MSR support statically
> > > > into
> > > > > the
> > > > > kernels. It seems that when I do that I don't
> > have
> > > > > to
> > > > > make those devices. Also, if you included
> > support
> > > > > for
> > > > > CPUID and MSR as loadable modules, you may
> > need to
> > > > > load those (ie modprobe) before running
> > longrun
> > > > > util.
> > > > > 
> > > > >   -- Doug
> > > > > 
> > > > > 
> > > > > At 10:59 AM 1/13/2003 -0500, you wrote:
> > > > > >I finally got my kernel configured with msr
> > and
> > > > > cpuid.
> > > > > >  I ran the MAKEFILE-MSR-CPUID.  When I type
> > > > > ./longrun
> > > > > >-l - I get the error "longrun:error reading
> > > > > >/dev/cpu/0/cpuid: Invalid argument".
> > > > > >
> > > > > >Does anyone know what I need to do to solve
> > this
> > > > > >problem?
> > > > > 
> > > > > 
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