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Technology Stocks : All About Sun Microsystems -- Ignore unavailable to you. Want to Upgrade?

To: JC Jaros who wrote (21078)	10/13/1999 12:59:00 AM
From: Charles Tutt	Read Replies (4) \| Respond to of 64865

On the Intel conference call tonight, I believe they mentioned having the Itanium running "Windows 64" in the lab. I wonder what exactly that is. Twister ?? James ??

To: JC Jaros who wrote (21078)	10/13/1999 1:14:00 AM
From: Prognosticator	Read Replies (1) \| Respond to of 64865

The trials and tribulations of SMP: Intel Style. bxboards.com Another reason why you cannot expect double performance is that a great deal of hand-shaking between the processors is necessary in order to prevent bus-contention issues. Therefore the processors spend a great deal of their time simply running "After you, Claude" checking in order to prevent resource clashes, or even worse, deadlocks. The addition of a second processor will only increase speeds by an order of 50%, while adding a 3rd would increase things only be another 25%. With 4 processors the law of diminishing returns kicks in, with a gain of only around 12-13% when stepping up from 3 to 4 processors. Pathetic. Twister: pay attention now: the Ultra's from Sun have a crossbar between the CPU and memory and Disk, which means you get damn-near linear speedup. Not a measly 12-13 % going from 3 to 4, but 33% like you should. This is why Sun Servers will kick Intel's butt for the foreseeable future: they have one hell of a systems interconnect. Anyone out there care to refute this. The silence is deafening me. P. P.S. Before you ask, no a crossbar isn't a length of iron with a notch at both ends.