[Math-atlas-results] 3.5.2: I don't need your damned pity!

[R C. W. <rw...@cs...>]

Guys,

In order to allow for dynamically linked libs, I've been trying to get
performance similar to Julian's athlon code with code written in gas
assembler.  After a whole lot of work, I got a kernel that is not
quite as efficient in-cache as Julian's kernel, but seemed to tie or
beat it out-of-cache for all precisions except double.  Even for double,
however, my new kernels could be used for cleanup.

This took an entire week of evenings and two weekends of intensive effort,
capped by the posting of 3.5.2 to sourceforge.  I then ran the timing
to see what kind of speedup I got.  The short answer: not really any :-{

I ran problems between 100-1000 on my 600Mhz Athlon classic, for all four
precisions, using matrix multiply and LU factorization.

For double, the addition of cleanup did help slightly.  I was most excited
about single, where use of a larger blocking factor (60 vs. 30) allowed
me to obtain a slighly higher peak matmul.  However, the increase in NB
caused LU to run *slower*, so maybe I'll back out this change for 3.5.3.

For single precision complex, again there was a larger NB for increased 
matmul peak.  The LU times appear to run within clock speed of each other.

For double precision complex, there appears to have been a microscopic
speedup.  

Yay,
Clint

Timings for a 600Mhz Athlon classic, with 512K cache, but timers flushing 2MB:

VERS    OP    100    200    300    400    500    600    700    800    900   1000
=====  ===  =====  =====  =====  =====  =====  =====  =====  =====  =====  =====
3.4.1  sMM    800    897    913    931    943    982    953    966    959    966
3.5.2  sMM    732    897    928    931    962    982    980    957    978    976
3.4.1  sLU    373    546    636    687    724    757    761    784    790    784
3.5.2  sLU    370    492    587    626    666    705    729    741    771    765

3.4.1  dMM    714    822    887    883    877    939    903    906    935    935
3.5.2  dMM    723    789    914    898    909    900    915    923    947    930
3.4.1  dLU    321    462    550    591    589    636    659    696    719    716
3.5.2  dLU    332    465    565    586    622    685    678    696    719    709

3.4.1  cMM    857    900    939    914    917    944    939    944    951    946
3.5.2  cMM    822    886    939    931    943    960    959    954    969    960
3.4.1  cLU    473    664    727    758    775    783    795    827    834    844
3.5.2  cLU    473    637    735    726    757    817    795    822    830    846

3.4.1  zMM    723    800    864    883    870    882    880    881    891    884
3.5.2  zMM    833    823    864    883    870    900    891    892    903    893
3.4.1  zLU    420    510    573    632    687    681    703    711    736    755
3.5.2  zLU    417    547    616    620    640    689    703    726    739    764