Re: Incorrect /proc/cpuinfo for AMD A6-9220
On 2018-04-16 01:59, Corinna Vinschen wrote:
> On Apr 13 20:36, Jeffrey Walton wrote:
>> On Fri, Apr 13, 2018 at 7:51 AM, Corinna Vinschen wrote:
>>> On Apr 12 23:01, Jeffrey Walton wrote:
>>>> 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
>>>> Notice /proc/cpuinfo is missing aesni, pclmul, rdrand, SSE4.1, SSE4.2,
>>>> AVX, etc.
also AMD missing flags monitor, popcnt, power management constant|invariant tsc;
AMD cache size shown is 0, instead of the sum of L2+L3; AMD cpuid level shown is
the number of standard functions, instead of the total number of standard and
extended non-zero function results
>>> 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!
>> 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?
> Whitespacing looks correct to me. In vim speak, ts=8, sw=2.
also for vim, soft tab stop "sts=2" adds 2 spaces per tab input, avoids
backspacing if you type tabs
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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