Writing Parallel software Outline Introduction and expectations Thread-safety issues oScope what is parallelism ●Data races o Finding parallelism o Thread safety Expectations Thread-safety solutions 2Threading,theory and practice Avoid the problem oProcesses and threads o Replicate o Python threading ●Atomics C++threading and async o Locking Credits to Danilo Piparo for the original talk in previous tCSCs ..and all the content I shamelessly stole from it 2/46 S.Ponce-CERNWriting Parallel software 2 / 46 S. Ponce - CERN Intro Threading Safety Solutions Outline 1 Introduction and expectations Scope : what is parallelism ? Finding parallelism Expectations 2 Threading, theory and practice Processes and threads Python threading C ++threading and async 3 Thread-safety issues Data races Thread safety 4 Thread-safety solutions Avoid the problem Replicate Atomics Locking Credits to Danilo Piparo for the original talk in previous tCSCs ... and all the content I shamelessly stole from it