Examples of Profiling using Diffusion Code - Basis for Report2 Due 30Oct02
14 October 02

Wednesday (9Oct02) Lecture presented the background to characterize the computer solution of the Diffusion Model

Sample codes are available now

1. mkdir diffusion
2. cd diffusion
3. cp ~stewart/cs575/fall02/diffusion/* . (do not forget the final "dot".)

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   Email sent 28oct02 to class:

   Fortran Programmers:
   
   f90 -o fdiff f_diffusion.f -xlic_lib=sunperf    
   
   f90 -o fdiff-sunperf f_diffusion.f sgeco.f sgesl.f blas.f
   
   and you can explore the effect on timing by looking at different 
   optimization levels using the 
   -O
   option on the compile line.
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   C Programmers:
   
   f90 -c sgeco.f sgesl.f blas.f
   cc -o cdiff c_diffusion.c sgeco.o sgesl.o blas.o -lm -lF77
   
   cc -o cdiff c_diffusion.c -xlic_lib=sunperf
   
   and you can explore the effect on timing by looking at different
   optimization levels using the 
   -O
   option on each of the compile lines
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Second Report (due Oct. 30), what to discover from your code.

• At appropriate locations in the source code, add calls to the system timer dtime. Optionally, explore the use of the C-based sytem timer gethrtime man gethrtime
• Gather data to compare the run-time performance of using the source code from Linpack, sgeco.f, sgesl.f, and blas.f with the Sun Performance Library, as linked above.
• Write your report, assign2.html, as both a web-page in your class account and a hardcopy print out, due in class on 30 October 02. Send email notice to stewart@rohan.sdsu.edu when the web-page is ready to be viewed.

Recall, your code needs to produce data to support conclusions in your report.
You may wish to review the lab discussion on Problem Solving Skills