| Kinson Chik | a8fa74c | 2011-07-29 11:33:41 -0700 | [diff] [blame^] | 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 | |