Re:Intel Problems
by leshow on Tuesday January 19, 2021 @04:36PM
(#25839209)
> I'm willing to bet that creates a significant bottleneck on how large of a dispatch and reorder system they can have
My understanding is the reorder buffer of the m1 is particularly large:
"A +-630 deep ROB is an immensely huge out-of-order window for Apple’s new core, as it vastly outclasses any other design in the industry. Intel’s Sunny Cove and Willow Cove cores are the second-most “deep” OOO designs out there with a 352 ROB structure, while AMD’s newest Zen3 core makes due with 256 entries, and recent Arm designs such as the Cortex-X1 feature a 224 structure."
My understanding is the reorder buffer of the m1 is particularly large:
"A +-630 deep ROB is an immensely huge out-of-order window for Apple’s new core, as it vastly outclasses any other design in the industry. Intel’s Sunny Cove and Willow Cove cores are the second-most “deep” OOO designs out there with a 352 ROB structure, while AMD’s newest Zen3 core makes due with 256 entries, and recent Arm designs such as the Cortex-X1 feature a 224 structure."
https://www.anandtech.com/show/16226/apple-silicon-m1-a14-de...