Some benchmarks on core2-unknown-linux-gnu (sage.math)Intel(R) Xeon(R) CPU
X7460 @ 2.66GHz
8307 on trunk r1623 , should be same score as mpir-0.9.0
10252 on core-2 branch r1623
a 23.4% speedup .
I keep getting
make[5]: warning: Clock skew detected. Your build may be incomplete.
so hopefully the above timings are correct
I found the core-2 mul/sqr_basecase code , but there was only windows
versions , whatever happened to the linux stuff.
> On Friday 20 February 2009 14:12:19 ja...@njkfrudils.plus.com wrote:
>
> What happened to core-2 mul_basecase and sqr_basecase ? , no-wonder core-2
> benchmarks are crap
>
> > Running the k8/k10 asm code with no changes on the core2 machine sage we
> > get this
> >
> > popcount,hamdist no popcount instruction
> >
> > slowdowns---------
> > add,sub are 0.50x
> > rshift1,lshift1 0.70x
> > k8 lshift,rshift 0.91x
> > addmul_1,submul_1 0.89x but faster for <20 limbs...
> >
> > speedups----------
> > and,ior,xor are 1.13x
> > nand,nior,xnor,andn,iorn are 1.50x
> > com is 2.00x
> > divebyff 1.40x although not better until 12limbs
> > diveby3 2.30x
> > addadd,addsub 1.50x
> > sumdiff 1.26x
> > addlsh1 1.50x
> > sublsh1 1.40x
> > k10 lshift,rshift 1.18x
> > mul_1 1.04x
> >
> > for mul basecase we get
> > ./speed -c -r -s 1-40 mpn_jaytest mpn_mul_basecase
> > overhead 6.12 cycles, precision 10000 units of 3.75e-10 secs, CPU freq
> > 2666.76 MHz
> > mpn_jaytest mpn_mul_basecase
> > 1 #9.21 2.3531
> > 2 #21.43 2.0070
> > 3 #56.00 1.5234
> > 4 #91.36 1.4960
> > 5 #136.17 1.4320
> > 6 #195.54 1.3769
> > 7 #261.22 1.3718
> > 8 #336.56 1.3482
> > 9 #419.62 1.3441
> > 10 #527.14 1.3054
> > 11 #634.44 1.3105
> > 12 #744.00 1.3172
> > 13 #873.85 1.2931
> > 14 #1024.55 1.1088
> > 15 #1169.00 1.0873
> > 16 #1328.89 1.0704
> > 17 #1492.50 1.0672
> > 18 #1710.00 1.0317
> > 19 #1880.00 1.0488
> > 20 #2112.00 1.0246
> > 21 #2288.00 1.0385
> > 22 #2547.50 1.0128
> > 23 #2787.50 1.0063
> > 24 #3012.50 1.0108
> > 25 #3212.50 1.0241
> > 26 3556.67 #0.9953
> > 27 3836.67 #0.9939
> > 28 4106.67 #0.9935
> > 29 4370.00 #0.9908
> > 30 4700.00 #0.9617
> > 31 4996.67 #0.9973
> > 32 5380.00 #0.9944
> > 33 5685.00 #0.9727
> > 34 6105.00 #0.9853
> > 35 6375.00 #0.9906
> > 36 6775.00 #0.9764
> > 37 7540.00 #0.9151
> > 38 7515.00 #0.9714
> > 39 #7955.00 1.0578
> > 40 #8750.00 1.0086
> >
> > This is all with no tweeking on
> > cpu family : 6
> > model : 29
> > model name : Intel(R) Xeon(R) CPU X7460 @ 2.66GHz
> > stepping : 1
>
>
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