Linked by MOS6510 on Fri 17th May 2013 22:22 UTC
Hardware, Embedded Systems "It is good for programmers to understand what goes on inside a processor. The CPU is at the heart of our career. What goes on inside the CPU? How long does it take for one instruction to run? What does it mean when a new CPU has a 12-stage pipeline, or 18-stage pipeline, or even a 'deep' 31-stage pipeline? Programs generally treat the CPU as a black box. Instructions go into the box in order, instructions come out of the box in order, and some processing magic happens inside. As a programmer, it is useful to learn what happens inside the box. This is especially true if you will be working on tasks like program optimization. If you don't know what is going on inside the CPU, how can you optimize for it? This article is about what goes on inside the x86 processor's deep pipeline."
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RE[4]: Comment by Drumhellar
by siride on Sat 18th May 2013 15:21 UTC in reply to "RE[3]: Comment by Drumhellar"
siride
Member since:
2006-01-02

> all this focus on sequential code optimization seems to be a major detractor away from what could have been a much better overall strategy for maximizing parallel computation.

Did you miss the Itanium?

Reply Parent Score: 4

RE[5]: Comment by Drumhellar
by tylerdurden on Sat 18th May 2013 15:59 in reply to "RE[4]: Comment by Drumhellar"
tylerdurden Member since:
2009-03-17

It depends what the previous poster meant by parallelism.

Reply Parent Score: 2

RE[6]: Comment by Drumhellar
by Alfman on Sat 18th May 2013 19:31 in reply to "RE[5]: Comment by Drumhellar"
Alfman Member since:
2011-01-28

tylerdurden,

Haha, I know right. Both Intel Itanium and superscalar x86 architectures are different ways to achieve a bit more parallelism by doing more work per cycle. But both of those architectures are still sequential in nature and neither of them are parallel in the sense that FPGAs are.

Reply Parent Score: 2