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To: Elmer who wrote (128279)	2/25/2001 11:53:40 AM
From: Scumbria	Read Replies (1) \| Respond to of 186894

Elmer, Like many features in P4, SMT sounds very clever. What are the odds that they actually did something useful wrt to SMT? Scumbria

To: Elmer who wrote (128279)	2/25/2001 1:18:02 PM
From: Tony Viola	Respond to of 186894

Elmer, >In simulations, says Eggers, an 8-wide superscalar microprocessor executing a web server workload such as Apache can produce on average 1.1 cycles per instruction (IPC). SMT has quadrupled that, achieving 4.6 IPC. If SMT yields anything close to this, Foster will be the only chip for servers with the higher density (always), and lower power requirements that have to be part of the modular revolution about to take place in servers. Well, the only one except for the big database servers which won't go away. McKinley will suit those fine. The future looks better all the time for Intel in servers, as long as they can get the new chips out close to schedule and cleanly. Tony

To: Elmer who wrote (128279)	2/25/2001 3:53:55 PM
From: Joe NYC	Read Replies (1) \| Respond to of 186894

Elmer, I haven't seen any place that describes how this (SMT) actually happens. The processor needs to swap the status of the CPU someplace and load it for another thread in order to do something on this other thread. Another thing that's not clear is whether existing code will be able to take advantage of this feature, or whether an OS can manage multiple simultaneous threads (that can consist of existing code) or if the code has to be completely recompiled. Joe