Lecture 11: OpenMP Tasking and Variable Scoping

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Announcement and recap

Code of the day: publishing data between threads

Quiz: two independent atomic flags

From loops to a task graph

sections: explicitly written independent blocks

task: work generated at runtime

Linked-list example: preserve each task’s pointer

Waiting for tasks

Quiz: sentence order

depend: express selected ordering edges

Quiz: doubling and incrementing

Variable scoping

Shared temporaries can race even with distinct output indices

Quiz: firstprivate(i) versus private(i)