OLD | NEW |
| (Empty) |
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 | |
OLD | NEW |