What every programmer should know about memory, Part 1 [LWN.net]

What every programmer should know about memory, Part 1

Posted Apr 26, 2018 20:11 UTC (Thu) by quocbao (guest, #123983)
Parent article: What every programmer should know about memory, Part 1

I hope someone will update this informative article beacause nowaday, many things have been changed for example FSB bus is replaced by QPI/UPI links.

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What every programmer should know about memory, Part 1

Posted Apr 26, 2018 21:37 UTC (Thu) by neilbrown (subscriber, #359) [Link] (1 responses)

Maybe you could be that someone?

What every programmer should know about memory, Part 1

Posted Apr 28, 2018 4:05 UTC (Sat) by quocbao (guest, #123983) [Link]

I think it has a reason because nobody did that for over ten years since this article was published. By the way, Wikipedia already had a good article about QPI.

What every programmer should know about memory, Part 1

Posted Apr 29, 2018 12:59 UTC (Sun) by farnz (subscriber, #17727) [Link]

Nobody has updated this article because, bar a few details, not a lot has changed. FSB is diagrams 2.1 and 2.2, while QPI/UPI is diagram 2.3. All that's changed is which systems fall into which diagram.

Similar applies to the discussion of DRAM access details - while the numbers have changed, the differences are minor; DDR4 is a change from DDR3 in the same way that DDR3 is a change from DDR4, and FB-DRAM is now nearly gone from the market.

However, beyond these details, the underlying technology remains the same as it was back in 2007. Similar applies to later parts (caches etc) - the numbers are changed, but the technology and its behaviour are not significantly different.