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| 1 solaris 2.5.1 usparc 167mhz?? - SC4.0 cc -fast -Xa -xO5 | |
| 2 | |
| 3 For the ultra sparc, SunC 4.0 cc -fast -Xa -xO5, running 'des_opts' | |
| 4 gives a speed of 475,000 des/s while 'speed' gives 417,000 des/s. | |
| 5 I believe the difference is tied up in optimisation that the compiler | |
| 6 is able to perform when the code is 'inlined'. For 'speed', the DES | |
| 7 routines are being linked from a library. I'll record the higher | |
| 8 speed since if performance is everything, you can always inline | |
| 9 'des_enc.c'. | |
| 10 | |
| 11 [ 16-Jan-06 - I've been playing with the | |
| 12 '-xtarget=ultra -xarch=v8plus -Xa -xO5 -Xa' | |
| 13 and while it makes the des_opts numbers much slower, it makes the | |
| 14 actual 'speed' numbers look better which is a realistic version of | |
| 15 using the libraries. ] | |
| 16 | |
| 17 options des ecb/s | |
| 18 16 r1 p 475516.90 100.0% | |
| 19 16 r2 p 439388.10 92.4% | |
| 20 16 c i 427001.40 89.8% | |
| 21 16 c p 419516.50 88.2% | |
| 22 4 r2 p 409491.70 86.1% | |
| 23 4 r1 p 404266.90 85.0% | |
| 24 4 c p 398121.00 83.7% | |
| 25 4 c i 370588.40 77.9% | |
| 26 4 r1 i 362742.20 76.3% | |
| 27 16 r2 i 331275.50 69.7% | |
| 28 16 r1 i 324730.60 68.3% | |
| 29 4 r2 i 63535.10 13.4% <-- very very weird, must be cache problems. | |
| 30 -DDES_UNROLL -DDES_RISC1 -DDES_PTR | |
| 31 | |
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