3 ms·
The latency is going to be much too high, when the performance numbers turn up people will decide they don’t want it. A similar thing happened with Intel Optan
by jleahy 4y ago
The latency is going to be much too high, when the performance numbers turn up people will decide they don’t want it.
A similar thing happened with Intel Optane (which is now dying).
- rbanffy 4y agoMemory latency is only bad when you have a cache miss. That’s why mainframes have gigabytes of cache between their processors and memory. You can mitigate that with some in-package HBM. IIRC, Xeon Phis came with up to 16GB of it - you could in theory have a workstation without any memory sticks.
- Dylan16807 4y agoI would hope and expect that CXL gets latency low enough to make it viable. These days you're mostly waiting for the core of the ram chips to respond as everything else races around it. For Optane, I'd say it's doing so badly because it's barely cheaper than RAM, which means it's only useful in niche situations.