crypto/des/times/usparc.cc

   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 belive 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