Understanding task and data parallelism

Summary:Intel director James Reinders explains the difference between task and data parallelism, and how there is a way around the limits imposed by Amdahl's Law

Intel director James Reinders explains the difference between task and data parallelism, and how there is a way around the limits imposed by Amdahl's Law...

I'm James Reinders, and I'm going to cover two key concepts involved with parallelism today. They are terms that you'll hear when you start working with parallel programming, when you start looking at multicore processors and start writing programs for them, and they're really important terms to thoroughly understand. They're very simple concepts. Let's go over them.

The first one I'll go over today is task and data parallelism — what are they and what do they mean? — and then I'll finish with talking a bit about Amdahl's Law. Amdahl's Law is a very interesting observation but sometimes it is used to predict things that simply don't make sense.

So let's start with task and data parallelism. Parallelism is doing multiple things at once, but there are fundamentally two types of parallelism that…

Topics: IT Employment

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