Re: [Math-atlas-devel] ATLAS build problem on new Opteron

[Kate M. <km...@po...>]

Kate> ERROR 10: vendor='AuthenticAMD', family=15, model=1, x86_64=1

Greg> This is weird, normal model numbers for Opterons are 4 and higher.

You might be interested in the values /usr/sbin/prtconf -v gives
for the CPU (note in particular the "cpu-model" field, marked with
astericks)

       cpu, instance #0 (driver not attached)
            Hardware properties:
                name='l2-cache-size' type=int items=1
                    value=00100000
                name='l2-cache-line-size' type=int items=1
                    value=00000040
                name='l2-cache-lines-per-tag' type=int items=1
                    value=00000001
                name='l2-cache-associativity' type=int items=1
                    value=00000010
                name='l1-icache-size' type=int items=1
                    value=00010000
                name='l1-icache-line-size' type=int items=1
                    value=00000040
                name='l1-icache-lines-per-tag' type=int items=1
                    value=00000001
                name='l1-icache-associativity' type=int items=1
                    value=00000002
                name='l1-dcache-size' type=int items=1
                    value=00010000
                name='l1-dcache-line-size' type=int items=1
                    value=00000040
                name='l1-dcache-lines-per-tag' type=int items=1
                    value=00000001
                name='l1-dcache-associativity' type=int items=1
                    value=00000002
                name='dtlb-4K-fully-associative?' type=int items=1
                    value=00000001
                name='dtlb-4K-size' type=int items=1
                    value=00000020
                name='itlb-4K-fully-associative?' type=int items=1
                    value=00000001
                name='itlb-4K-size' type=int items=1
                    value=00000020
                name='itlb-2M-fully-associative?' type=int items=1
                    value=00000001
                name='itlb-2M-size' type=int items=1
                    value=00000008
                name='dtlb-2M-fully-associative?' type=int items=1
                    value=00000001
                name='dtlb-2M-size' type=int items=1
                    value=00000008
                name='brand-string' type=string items=1
                    value='Dual Core AMD Opteron(tm) Processor 280'
                name='ext-cpuid-features' type=int items=1
                    value=e3d3fbff
                name='cpuid-features' type=int items=1
                    value=178bfbff
                name='chip#' type=int items=1
                    value=00000000
                name='apic-id' type=int items=1
                    value=00000000
                name='chunks' type=int items=1
                    value=00000010
                name='generation' type=int items=1
                    value=0000000f
                name='ext-family' type=int items=1
                    value=00000000
                name='stepping-id' type=int items=1
                    value=00000002
***             name='cpu-model' type=int items=1
                    value=00000001
                name='family' type=int items=1
                    value=0000000f
                name='vendor-id' type=string items=1
                    value='AuthenticAMD'
                name='cpu-mhz' type=int items=1
                    value=0000096c
                name='reg' type=int items=1
                    value=00000000
                name='device_type' type=string items=1
                    value='cpu'

The following code (cut down from
atlas-3.7.11/CONFIG/archinfo_x86.c) is saying "model=1" on this
machine:

**** foo.c *******

#include <stdint.h>
#include <stdio.h>

static void do_cpuid(uint32_t *dest, uint32_t level)
{
     uint32_t *dst = dest;
     __asm("cpuid": "=a" (dst[0]), "=b" (dst[1]), "=c" (dst[2]), "=d" (dst[3])
            : "a" (level));
}

int main()
{
   unsigned *family;
   unsigned *model;
   uint32_t r[4];
   uint32_t max_level;

   do_cpuid(r, 1);
printf("r[0]= %x\n", r[0]);
   *family = (r[0] >> 8) & 0xf;
   if (*family == 0xf) /* extended family is added in */
       *family += ((r[0] >> 20) & 0xff);

printf("family= %d\n", *family);

   *model = (r[0] >> 4) & 0xf;
   if (*model == 0xf)/* extended model is concatenated ... no idea why */
    *model |= ((r[0] >> 12) & 0xf0);
printf("model= %d\n", *model);
   return(0);
}

***

% gcc -o foo foo.c
% foo
r[0]= 20f12
family= 15
model= 1
%
% gcc -v 
Using built-in specs.
Target: i386-pc-solaris2.10
Configured with: /export/home/kate/gcc-4.1.1/src/gcc-4.1.1/configure --enable-languages=c --with-gnu-as --with-as=/export/home/kate/binutils-2.16.1/x86_64-SunOS-gcc-3.4.3-sun/bin/as --with-ld=/usr/ccs/bin/ld --prefix=/export/home/kate/gcc-4.1.1/x86_64-SunOS
Thread model: posix
gcc version 4.1.1
%

I used the following as the bootstrap compiler

%/usr/sfw/bin/gcc -v
Reading specs from /usr/sfw/lib/gcc/i386-pc-solaris2.10/3.4.3/specs
Configured with: /builds/sfw10-gate/usr/src/cmd/gcc/gcc-3.4.3/configure --prefix=/usr/sfw --with-as=/usr/sfw/bin/gas --with-gnu-as --with-ld=/usr/ccs/bin/ld --without-gnu-ld --enable-languages=c,c++ --enable-shared
Thread model: posix
gcc version 3.4.3 (csl-sol210-3_4-branch+sol_rpath)
%

and I get the same results (model= 1) if I use this compiler to build
foo.

Kate Minola
University of Maryland, College Park
km...@en...