Re: failure notice

[David Stacey <drstacey at tiscali dot co dot uk>]

On 14/04/18 06:00, R0b0t1 wrote:
> On Fri, Apr 13, 2018 at 10:51 PM, Brian Inglis
> <Brian.Inglis[AT]systematicsw.ab.ca>  wrote:
> > On 2018-04-13 21:10, Jeffrey Walton wrote:
> > > > On Fri, Apr 13, 2018 at 8:36 PM, Jeffrey Walton<noloader[AT]gmail.com>  wrote:
> > > > > On Fri, Apr 13, 2018 at 7:51 AM, Corinna Vinschen
> > > > > <corinna-cygwin[AT]cygwin.com>  wrote:
> > > > > > On Apr 12 23:01, Jeffrey Walton wrote:
> > > > > > > Hi Everyone,
> > > > > > >
> > > > > > > I'm working on an AMD A6-9220 and seeing unusual results from
> > > > > > > /proc/cpuinfo. I think this may be an issue with the latest Cygwin. It
> > > > > > > may be present in earlier versions, too.
> > > > > > >
> > > > > > > Russinovich's coreinfo is shown below
> > > > > > > (https://docs.microsoft.com/en-us/sysinternals/downloads/coreinfo).
> > > > > > > Notice /proc/cpuinfo is missing aesni, pclmul, rdrand, SSE4.1, SSE4.2,
> > > > > > > AVX, etc.
> > > > > > Note that, in theory, cpuinfo has to be extended for each new CPU
> > > > > > generation.  That's a lot of work for marginal gain (Cygwin's not a real
> > > > > > kernel) so I'm doing this only very seldomly.
> > > > > >
> > > > > > Patches welcome, of course!
> > > > > Thanks Corinna. I think I found the file of interest at fhandler_proc.cc.
> > > > >
> > > > > Whitespace is a bit off. It is a mix of tabs and space:
> > > > >
> > > > >        if (features1 & (1 << 0))
> > > > >      print (" fpu");
> > > > >        if (features1 & (1 << 1))
> > > > >      print (" vme");
> > > > >
> > > > > Should I perform a whitespace check-in before things begin? Or can you
> > > > > knock it out?
> > > > The attachment is pp 572-74 from AMD's Programmer's Guide, Volume 3,
> > > > General-Purpose and System Instructions (December 2017)
> > > > (https://support.amd.com/TechDocs/24594.pdf). I believe it has the all
> > > > the necessary information.
> > > >
> > > > Are there any objections to using it?
> > > Any ideas how to get this through? It is a three page PDF extracted from the
> > > AMD manual. It has the necessary information for the CPUID updates.
> > Just include the link to Appendix D section 2 from the ToC:
> > https://support.amd.com/TechDocs/24594.pdf#G14.931059
> He may be concerned about the longterm availability of the referenced passages.

By forwarding your failure notice, you've already sent it to the list in 
base64 text format, which is enough for anyone to recover the document 
:-) This list accepts bz2 attachments, so if you want to do this in the 
future then just compress it. For the archives, the attached *should* be 
your PDF recovered from base64 and then compressed.

Dave.

Attachment: AMD-CPUID-Caps.pdf.bz2
Description: application/bzip

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