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32 lines
1.1 KiB
C++
32 lines
1.1 KiB
C++
solaris 2.5.1 usparc 167mhz?? - SC4.0 cc -fast -Xa -xO5
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For the ultra sparc, SunC 4.0 cc -fast -Xa -xO5, running 'des_opts'
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gives a speed of 475,000 des/s while 'speed' gives 417,000 des/s.
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I believe the difference is tied up in optimisation that the compiler
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is able to perform when the code is 'inlined'. For 'speed', the DES
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routines are being linked from a library. I'll record the higher
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speed since if performance is everything, you can always inline
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'des_enc.c'.
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[ 16-Jan-06 - I've been playing with the
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'-xtarget=ultra -xarch=v8plus -Xa -xO5 -Xa'
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and while it makes the des_opts numbers much slower, it makes the
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actual 'speed' numbers look better which is a realistic version of
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using the libraries. ]
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options des ecb/s
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16 r1 p 475516.90 100.0%
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16 r2 p 439388.10 92.4%
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16 c i 427001.40 89.8%
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16 c p 419516.50 88.2%
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4 r2 p 409491.70 86.1%
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4 r1 p 404266.90 85.0%
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4 c p 398121.00 83.7%
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4 c i 370588.40 77.9%
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4 r1 i 362742.20 76.3%
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16 r2 i 331275.50 69.7%
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16 r1 i 324730.60 68.3%
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4 r2 i 63535.10 13.4% <-- very very weird, must be cache problems.
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-DDES_UNROLL -DDES_RISC1 -DDES_PTR
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