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From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Subject: Re: Incorrect /proc/cpuinfo for AMD A6-9220
Reply-To: Brian DOT Inglis AT SystematicSw DOT ab DOT ca
To: cygwin AT cygwin DOT com
References: <CAH8yC8k4U-DO0n8r_K=93jPkXCQ=qH8ZMv8CasmkN5=K3UOMLA AT mail DOT gmail DOT com> <20180413115120 DOT GA27440 AT calimero DOT vinschen DOT de> <CAH8yC8ngb9RuWkAs-Ld6qFswsh0qjfm-mrWLBTtgKM-zWjiPPw AT mail DOT gmail DOT com> <20180416075920 DOT GB2539 AT calimero DOT vinschen DOT de>
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Date: Mon, 16 Apr 2018 09:19:09 -0600
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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
>>>> (https://docs.microsoft.com/en-us/sysinternals/downloads/coreinfo).
>>>> 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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