On Thursday 20 May 2010 03:37:34 Jason Moxham wrote:
> On Thursday 20 May 2010 03:11:24 Bill Hart wrote:
> > On 20 May 2010 02:58, Jason Moxham <[email protected]> wrote:
> > > On Thursday 20 May 2010 02:11:11 Bill Hart wrote:
> > >> There's a new Opteron on the block. family 16 model 8. It's an Opteron
> > >> 8439 SE. We don't have it in cpuid.c yet.
> > >
> > > Looks like another K102 , doesn't look like any differences for us ,
> > > although we dont know until we test it.
> >
> > Passes make check once the cpuid is put in.
It should of passed make check anyway!! , just as a generic x86_64 , if not we
have a bug.
Remember using ./configure --build=k102-unknown-linux-gnu you can force it to
build a k102 build , same for any cpu
> > See below for bench. This
> > particular machine is 2.8GHz(owner is in cc). I didn't make tune, but
> > that shouldn't be needed.
> >
> > Index: cpuid.c
> > ===================================================================
> > --- cpuid.c (revision 2928)
> > +++ cpuid.c (working copy)
> > @@ -120,7 +120,8 @@
> > case 16:
> > if (model == 2) { CPUIS(k10);break;}
> > if (model == 4) { CPUIS(k102);break;}
> > - break;
> > + if (model == 8) { CPUIS(k102);break;}
> > + break;
> > }
> > }
> > else if (strcmp (vendor_string, "CentaurHauls") == 0)
> >
> > > By the way the difference between what we call the K102 and the K10 ,
> > > is the "same" as the difference between early K8 and late K8's , a
> > > slight difference in L1-data cache and store forwarding , which does
> > > effect some functions eg copy,addadd,lshiftcom , some more than others
> > >
> > >> Also we currently have a symbol in the library, mpn_sqr_n and a
> > >> #define in mpir.h to rename it mpn_sqr in line with gmp. But that
> > >> isn't sufficient. It breaks gcc on machines where gcc has been built
> > >> with dynamic libs. On the face of it this shouldn't affect anyone, but
> > >> in fact it will affect lots of people. The only solution I see is to
> > >> rename the library symbol.
> > >
> > > we can just export both names , so we are compatible with the new gmp
> > > AND the old
> >
> > Yeah, I noticed that.
> >
> > Anyhow, good idea, but not in mpir.h. It has to be in the library itself.
>
> I ment in the library , trying to think how you do it :) , I know how to do
> it in asm , but in C ?
>
> > >> Also, GMP defines mpn_copyi and mpn_copyd. On generic x86_64 machines,
> > >> we don't seem to have any assembly for this. There's no fallback
> > >> generic C symbol in the lib.
> > >
> > > we can the fallback C code that a fat build uses , with the new K102
> > > cpuid above there is no current generic x86_64 cpu :)
> >
> > True.
> >
> > >> Bill.
> >
> > AuthenticAMD Family 16 Model 8 Stepping 0
> > Six-Core AMD Opteron(tm) Processor 8439 SE
> > Speed: 0.80 GHz (reported)
>
> powersave on ? , below useless
>
> > Category base
> > Program multiply (weight 1.00)
> > 128 128 => 62415242
> > 512 512 => 14910433
> > 8192 8192 => 174206
> > 131072 131072 => 3012
> > 2097152 2097152 => 108
> > 128 128 => 57065363
> > 512 512 => 13512577
> > 8192 8192 => 120162
> > 131072 131072 => 2251
> > 2097152 2097152 => 74.3
> > 15000 10000 => 59494
> > 20000 10000 => 46812
> > 30000 10000 => 27429
> > 16777216 512 => 458
> > 16777216 262144 => 13.7 => 37401,46751
> > Program divide (weight 1.00)
> > 8192 32 => 1654949
> > 8192 64 => 1526756
> > 8192 128 => 926962
> > 8192 4096 => 297892
> > 131072 65536 => 3232
> > 8388608 4194304 => 11.5
> > 8192 8064 => 8473345
> > 16777216 262144 => 4.76 => 31816,39770
> > Program divexact (weight 1.00)
> > 8192 32 => 1872460
> > 8192 64 => 1853921
> > 8192 128 => 786511
> > 8192 4096 => 360487
> > 131072 65536 => 3813
> > 8388608 4194304 => 11.8
> > 8192 8064 => 14242122
> > 16777216 262144 => 7.84 => 38603,48254
> > Program gcd (weight 0.50)
> > 128 128 => 2284479
> > 512 512 => 227241
> > 8192 8192 => 5964
> > 131072 131072 => 111
> > 1048576 1048576 => 6.36 => 4656, 5819
> > Program gcdext (weight 0.50)
> > 128 128 => 988477
> > 512 512 => 175371
> > 8192 8192 => 4609
> > 131072 131072 => 68.3
> > 1048576 1048576 => 4.31 => 2981, 3726
> > Program root (weight 0.30)
> > 128 5 => 1142240
> > 512 3 => 514009
> > 8192 11 => 158261
> > 131072 3 => 4138
> > 1048576 3 => 190 => 37396,46745
> > Program fac_ui (weight 0.20)
> > 128 128 => 1588752
> > 1512 1512 => 53386
> > 15000 15000 => 1249
> > 1000010 1000010 => 4.39
> > 2123456 2123456 => 1.63 => 945, 1182 => 18481,23101
> > Category app
> > Program rsa (weight 1.00)
> > 512 => 24338
> > 1024 => 5200
> > 2048 => 883 => 4817, 6021
> > Program pi (weight 1.00)
> > 10000 => 458
> > 100000 => 27.0
> > 1000000 => 1.61 => 27.1, 33.9
> > Program bpsw (weight 1.00)
> > 1024 => 1138
> > 4096 => 32.4
> > 16384 => 0.840 => 31.4, 39.2
> > Program wagstaff (weight 1.00)
> > 1024 => 2626
> > 4096 => 105
> > 16384 => 3.36 => 97.5, 122 => 141, 177 =>
> > 1617, 2021
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