Writing Parallel software Intro c" Different flavors along the history Multiple levels of parallelism o machines(forever)/processors(for 40 years)/cores(for 25 years) o so not really a new topic Matching different programming techniques o RPC,MPI,map/reduce,.../multi-processing multi-threading Why is it trendy now o on many core processors you cannot avoid it individual cores are too slow o multi-core/multi-threading is tricky o and a major source of nasty bugs what find empect 5/46 S.Ponce-CERNWriting Parallel software 5 / 46 S. Ponce - CERN Intro Threading Safety Solutions what find expect Different flavors along the history Multiple levels of parallelism machines (forever) / processors (for 40 years) / cores (for 25 years) so not really a new topic ! Matching different programming techniques RPC, MPI, map/reduce, .../ multi-processing / multi-threading Why is it trendy now ? on many core processors you cannot avoid it individual cores are too slow multi-core/multi-threading is tricky and a major source of nasty bugs