Introduction to

Scientific Computing on a Cluster

Please navigate to

uiuc-cse.github.io/hpc-sp15

CSE Training • cse.illinois.edu/training/

single operation across multiple data

multiple units on multiple data for same overall process

context-switching processes operating over

multiple control flows or multiple data

“If you were plowing a field, which would you rather use?

Two strong oxen or 1024 chickens?”

(Seymour Cray)

Speedup

how much faster a parallel algorithm is than its sequential counterpart

S(N, P)=t_N_,_P₌₁ / t_N_,_P

Strong Scaling

how the solution time varies with the number of processors P for a fixed total problem size N.

E(N) = t₁ / (N t_N)

Weak Scaling

how the solution time varies with the number of processors P for a fixed problem size per processor N/P.

E(N) = (t₁ / t_N)

http://hpcuniversity.org/roadmap/

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