Poor matrix product performance
|
|
Bugzilla Link |
142 |
Created on |
Oct 29, 2005 21:09 |
Resolution |
REMIND |
Resolved on |
Oct 30, 2005 11:50 |
Version |
1.00beta |
OS |
Linux |
Architecture |
PC |
Attachments |
ipdd.sac, ipdd.f, matmul.sac
|
Extended Description
I've compiled several standard linear algebra matrix products,
using the transposed-right-argument algorithm, and array sizes of 400x400.
On my AMD platform here, I get the following timings:
Source code Compiler invocation User time
ipdd.sac sac2c -O3 7.5 sec
matmul.sac(demo)sac2c -O3 6.5 sec
ipdd.f g77 1.69 sec
ipdd.wif APL+Win interpreter 4.3 sec
So, as you can see, sac remains far behind in performance here.
I have not,as yet, made any attempt to examine the reasons for the
poor performance.