Intel demonstrates a 28-core processor running at 5GHz

Re:Intel demonstrates a 28-core processor running at 5GHz by nrclark on Tuesday June 05, 2018 @10:04AM (#17237652)

I wonder how much cache that CPU has, and how many memory channels? 28 cores don't do you much good if half of them are always blocked waiting for instructions.

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Re:Intel demonstrates a 28-core processor running at 5GHz by xtreme on Tuesday June 05, 2018 @10:39AM (#17238017)

24/26 core CPUs have been in the market for quite a while. The caches generally look like this: each core has 32KB instruction + 32KB data cache (L1) and 1MB L2 cache. All cores share the 30-40MB L3 cache and the 4/6 memory channels.

In my experience, cores getting blocked for instructions is not commonplace. They can block waiting for data if the computation is memory-bound.

Edit: These are the specs for the [Skylake 8180](https://ark.intel.com/products/120496/Intel-Xeon-Platinum-81...). These chips are nowhere close to 5GHz though.

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