NYCPHP Meetup

[epaul at speakeasy.net]

Tim, Thanks for the info!

> -----Original Message-----
> From: Tim Gales [mailto:tgales at tgaconnect.com]
> Sent: Friday, March 19, 2004 08:46 PM
> To: ''NYPHP Talk''
> Subject: RE: [nycphp-talk] more about SUSE ( 9.1 will support Linux 2.6 kernel)
> 
> RE:
> > What are the added benefits the Linux kernel 2.6 will
> > offer vs the 2.4 kernel?
> 
> Briefly the 2.6 Linux kernel has:
> 
> contributions from uClinux 
> (Linux for Microcontrollers project)
> 
> support for Axis Communications' ETRAX CRIS 
> ("Code Reduced Instruction Set") processors
> (some support was in 2.4 already)
> 
> support for NUMA 
> ("Non-Uniform Memory Access")
> 
> (I am a little sketchy on what NUMA is exactly.
> But from what I gather certain segments of 
> memory can have a stronger affinity for a 
> cpu -- or a dma device acting like a cpu -- 
> in a multi-cpu setup. NUMA allows a cpu to 
> sort of hop-over memory with which it doesn't 
> have much/enough affinity.)
> 
> Support for hyper-threading ala Pentium 4.
> 
> The kernel is preemptible -- the Linux kernel 
> can be interrupted to do something and return to 
> what it was doing.
> 
> I/O scheduler had a makeover.
> 
> futex support
> (Fast User-Space Mutexes)
> 
> (I am a little sketchy on futexes too -- 
> I think they help to serialize access to 
> the user space mutexes to help prevent 
> race conditions something like "spinlocks" 
> with an aditional priority based mechanism)
> 
> In summary, the 2.6 Linux kernel has more and 
> better hardware support. And a bunch of 
> 'high end' enhancements for servers.
> 
> 
> T. Gales & Associates 
> Helping People Connect with Technology 
> http://www.tgaconnect.com 
> 
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