Re: cpuflags (optimal compiler flags for building)

["Pouya D. Tafti" <p.d.tafti%gmail.com@localhost>]

2008/12/9 David Brownlee <abs%netbsd.org@localhost>:
> On Mon, 8 Dec 2008, Pouya D. Tafti wrote:
>
>> I see the same on a Core 2 Duo (I don't know what the correct output
>> would be).  Here is the output from cpuflags -v (version 1.22):
>>
>> . /usr/pkg/share/cpuflags/subr_NetBSD
>> . /usr/pkg/share/cpuflags/subr_gcc
>> . /usr/pkg/share/cpuflags/subr_x86
>> ARCH            : -march=prescott
>> FEATURES        : -mfpmath=sse -msse3
>> CPUFLAGS        : -mfpmath=sse -msse3 -march=prescott
>> GCC version     : 4.1.3
>> OS              : 'NetBSD'
>> OS version      : '5.99.3'
>> hw.model        : 'Intel 686-class'
>> hw.machine      : 'amd64'
>> hw.machine_arch : 'x86_64'
>> CPU             : 'Intel Pentium III (Katmai) (686-class), 2527.15
>> MHz, id 0x10676'
>> cpu0: Intel Pentium III (Katmai) (686-class), 2527.15 MHz, id 0x10676
>> cpu0: features bfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR>
>> cpu0: features bfebfbff<PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX>
>> cpu0: features bfebfbff<FXSR,SSE,SSE2,SS,HTT,TM,SBF>
>> cpu0: features2
>>
>> 8e3fd<SSE3,DTES64,MONITOR,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE41>
>> cpu0: features3 20100800<SYSCALL/SYSRET,XD,EM64T>
>> cpu0: "Intel(R) Core(TM)2 Duo CPU     T9400  @ 2.53GHz"
>> cpu0: I-cache 32KB 64B/line 8-way, D-cache 32KB 64B/line 8-way
>> cpu0: L2 cache 6MB 64B/line 24-way
>> cpu0: ITLB 128 4KB entries 4-way
>> cpu0: DTLB 256 4KB entries 4-way, 32 4MB entries 4-way
>> cpu0: Initial APIC ID 1
>> cpu0: Cluster/Package ID 0
>> cpu0: Core ID 1
>> cpu0: family 06 model 07 extfamily 00 extmodel 01
>
>        Aha - this is a cpuctl bug - its reporting the CPU as a
>        'Intel Pentium III (Katmai) (686-class)'
>        which cpuflags diligently maps to pentium3, then trys to "guess up"
>        to prescott. Could you open a PR on cpuctl for this?
>
> --
>                David/absolute       -- www.NetBSD.org: No hype required --
>

I think this issue has come up before:

<http://mail-index.netbsd.org/port-amd64/2008/11/24/msg000581.html>

I can file a PR when I get home this evening.

-- 
Pouya D. Tafti
<http://san-serriffe.org/>