On the effect of branch mispredictions in the Squeak VM
John M McIntosh
johnmci at mac.com
Mon Jul 7 22:43:07 UTC 2003
> Now that's interesting to see! It all looks as if the PPC is really
> *much*
> less affected by branch prediction issues. BTW, the numbers you sent
> around
> in the first message only said "using mac vm 3.5.2b1 (500Mhz G3) - were
> these taken from a gnuified VM? If not, could you run the two
> benchmarks to
> see if they have any effect?
These numbers come from the 3.5.2b1 gnuified gcc 3.3 mac vm
> My numbers using mac vm 3.5.2b1 (500Mhz G3) are:
>
> 10 0 0
> 100 0 0
> 1000 1 1
> 10000 8 7
> 100000 77 78
> 1000000 797 781
> 10000000 7817 7861
>
> again
> 10 0 0
> 100 0 0
> 1000 1 1
> 10000 15 8
> 100000 78 77
> 1000000 786 776
> 10000000 7809 7819
The slower numbers come from the non-gunified 3.5.2b1 codewarrior os-9
VM
--
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John M. McIntosh <johnmci at smalltalkconsulting.com> 1-800-477-2659
Corporate Smalltalk Consulting Ltd. http://www.smalltalkconsulting.com
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