Re[15]: Fwd: [Gc] Performance of bdwgc7.2 had degraded compared to 6.8 - the patch to test

Ivan Maidanski ivmai at mail.ru
Fri Dec 3 13:27:15 PST 2010


Hi Manuel,

It's strange...

Please confirm that you don't compile GC (for this benchmark) with multi-threading support and don't use GC_DEBUG (and GC_debug_ routines).

If yes, then the only difference between gc71+test1_patch and gc72a2+test2_patch+test3_patch is in GC_clear-a_few_frames() (in alloc.c). Please benchmark gc72a2+test4_patch (which is attached).

Regards.

Fri, 3 Dec 2010 09:37:56 +0100 письмо от Manuel.Serrano at inria.fr:

> Hi Ivan,
> 
> > 2 patches are attached (I'm sorry if you didn't received them
> earlier - I sent them to the mailing list).
> Yes? I have missed them there too. Strange...
> 
> > please compare 2 patches independently (I still dont know exactly where
> the problem is).
> It looks like the performance slowdown comes from something else.
> test2 and test3 behave has 7.2a2 and 7.2a4.
> 
> 7.2a4 7.2a2 7.1   7.0   7.0a7 6.8     7.1+ivan-30nov  7.2a2-test2  7.2a2-test3
> bague     0.76  0.77  0.77  0.76  0.77  0.77    0.77            0.77        
> 0.77
> beval     1.33  1.41  1.29  1.41  1.29  1.31    1.44            1.42        
> 1.42
> boyer     2.23  2.23  2.13  2.14  2.13  2.15    2.13            2.24        
> 2.23
> cgc       0.47  0.48  0.48  0.47  0.48  0.46    0.47            0.48        
> 0.49
> conform   1.91  1.91  1.74  1.72  1.73  1.79    1.71            1.92        
> 1.92
> earley    2.49  2.50  2.08  2.13  2.09  2.23    2.09            2.52        
> 2.52
> fib       0.01  0.01  0.01  0.01  0.01  0.01    0.01            0.01        
> 0.01
> fft       2.51  2.52  2.52  2.50  2.52  2.49    2.5             2.52        
> 2.52
> leval     1.12  1.13  1.05  1.01  1.02  1.09    1.02            1.14        
> 1.13
> maze      1.67  1.40  1.36  1.35  1.26  1.39    1.35            1.38        
> 1.39
> mbrot     7.03  7.05  7.04  7.03  7.05  7.05    7.02            7.06        
> 7.07
> nucleic   1.18  1.20  1.20  1.16  1.16  1.34    1.17            1.2         
> 1.21
> peval     1.46  1.47  1.20  1.19  1.20  1.18    1.2             1.47        
> 1.49
> puzzle    1.96  1.92  1.97  1.96  1.92  1.93    1.92            1.93        
> 1.92
> queens    2.29  2.29  1.55  1.56  1.55  1.44    1.56            2.36        
> 2.36
> qsort     1.65  1.64  1.63  1.62  1.63  1.63    1.63            1.65        
> 1.65
> rgc       1.28  1.28  1.23  1.23  1.24  1.28    1.23            1.29        
> 1.28
> sieve     1.58  1.60  1.44  1.42  1.41  1.51    1.43            1.59        
> 1.59
> traverse  5.14  5.15  3.55  3.60  3.56  3.58    3.59            5.13        
> 5.15
> almabench 1.45  1.45  1.45  1.45  1.45  1.46    1.45            1.46        
> 1.46
> SUM      39.52 39.41 35.69 35.72 35.47 36.09    35.69           39.54       
> 39.58
> 
> Cheers,
> 
> -- 
> Manuel
> 
> 
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