[Tallahassee-pm] Things I did a bad job of explaining in the meeting last night:

[Phillip Tyre]

Wanted to say that I had a great time last night, and it was good to
finally link some names to faces. The discussions were all over the
place giving us a veritable smorgasbord of topics to digest.
 
I've included some links about a few things I promised to mail the list
about. I opened my mouth about Hyper Threading, and then realized I
really didn't fully understand the subject. No one else seems to have
heard of it, so here it is. I actually didn't realize RH9 supported it,
so now I have to figure out how to get one of my new P4ht boxes going
with it.  
 
 
Subject 1: Hyper Threading
The bunk from Intel
List of supported OS's http://www.intel.com/support/platform/ht/os.htm
Summary: You need one of the following OS's
Red Hat Linux* 9 (Professional and Personal versions) 
SuSE Linux* 8.2 (Professional and Personal versions) 
Red Flag Linux* Desktop 4.0
Microsoft* Windows* XP Professional Edition 
Microsoft* Windows* XP Home Edition 
http://www.intel.com/homepage/land/hyperthreading_more.htm
Summary: You need the following hardware:
An Intel(r) Pentium(r) 4 processor supporting HT Technology 
An Intel(r) chipset that supports HT Technology 
System BIOS supporting HT Technology and has it enabled 
http://www.intel.com/eBusiness/products/server/processor/xeon/wp020901_s
um.htm?iid=Homepage+htland_ebizxeon
<http://www.intel.com/eBusiness/products/server/processor/xeon/wp020901_
sum.htm?iid=Homepage+htland_ebizxeon&> &
Summary: How it works:
Hyper-Threading Technology allows multi-threaded server software
applications to execute threads in parallel within each processor in a
server platform.
Hyper-Threading technology enables this thread-level parallelism (TLP)
by duplicating the architectural state on each processor, while sharing
one set of processor execution resources. When scheduling threads, the
operating system treats the two distinct architectural states as
separate "logical" processors. This allows multi-processor capable
software to run unmodified on twice as many logical processors. While
Hyper-Threading technology will not provide the level of performance
scaling achieved by adding a second processor, benchmark tests show some
server applications can experience 30 percent gain in performance.
http://www.intel.com/eBusiness/pdf/prod/server/xeon/wp020901.pdf
Summary: It's complicated. It's not exactly like I described it, on
closer reading, but it's sorta...
 
Some comments from people besides Intel:
http://arstechnica.com/paedia/h/hyperthreading/hyperthreading-1.html
http://www.gamepc.com/labs/view_content.asp?id=ppso
<http://www.gamepc.com/labs/view_content.asp?id=ppso&page=3> &page=3
 
 
 
Subject 2: Virtual Databases
http://www.baselinemag.com/article2/0,3959,1111900,00.asp
This is the actual article that crossed my desk the other day. Explains
why I read it in like 15 secs, and why most of it didn't stick. But here
it is, as promised.
 
 
Phillip
 
            
 
 
 
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