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>HT on Itanium is supposed to offer +10% or so performance,
No, I don't think they can afford to just mess around.
>And a doubling of cache (per core) over the currentMore cache is always better, but the further you take it, the more you get diminishing results. Its not like current IPF's are cache starved or something, so I'm not sure this will give another big performance boost. SPECFP will benefit though, it always does when you up the cache
> competition, that they make Itanium a monster.
Why would you hope for change for the sake of change ? You are aware switching from one ISA to another costs countless billions to our society ? Fine by me if there is an advantage, but if there isn't, I would hope that money gets used in a more efficient manner.
= The views stated herein are my personal views, and not necessarily the views of my wife. =Edited by P4man on 07/28/04 03:36 PM.
The way I see it, either Intel makes Itanium shine like it's the most New Era Yankees Baseball Cap powerful entity in the universe and make it complement current x86 64 tech in the xeons with extras, or they will have wasted billions in useless R Personally, I hope, for the sake of change and competition, that they make Itanium a monster.
Then there'll be speedstep to control power consumption, and there'll be foxton, another new thing about which little details are known. Foxton is supposed to increase speed in the most demanding peaks of operation. Either through dynamic overclocking or underclocking.
And after that there'll be Tukwila, with at least 4 cores (possibly up to 16). Budget versions of tukwila should be socket compatible with xeon!. I wonder what they'll do with Itanium until then?.
Which isnt too impressive if you consider IPF has been at 1.5 GHz since last summer, so that is a 30% clock increase in over 2 two years.
simpler 64 bit extensions (like x86 64) and a 667Mhz, 128bit bus would be like today to get a grasp of the enormous effort that has been directed towards Itanium.
Then there's silverdale, foxton, pellton, speedstep, and god only knows what they've put inside those 500 million logic transistors. Now only if this thing would be socket compatible with xeon. like some tukwila cpus will be.
> Personally, I hope, for the sake of change and
I think we'll have to wait for Tukwilla to get a real idea of what IPF can (or can't) do. Montecito doesn't look all that impressive to me.
Will montecito change the current Itanium acceptance? What about Xeon socket compatibility for tukwila with multiple cores? Sounds theoretically interesting. Itanium has a lot of features and a lot of resources have been pumped into it. Just imagine how a 24MB cache Xeon with Nike Cap Black Dri Fit
You never change the existing reality by fighting it. Instead, create a new model that makes the old one obsolete Buckminster Fuller
It will also get a 667Mhz FSB (10.6GB/s data transfer) and run at about 2Ghz with 4 times the current amount of cache. Montecito has already taped out.
Without a doubt, montecito will have amazing spec scores. With those gargantuan specifications, it should be a good processor, but will Atlanta Braves Hat Black
Ever thought of it? HT on Itanium is supposed to offer +10% or so performance, plus a 33% increase on clock rates over current generation, and a doubling of cache (per core) over the current generation. Within a year or so.
Why does it sound as if you're pulling this number out of thin air? Of course I want there to be an advantage; that's what I said! I wanted it to be bettered and made into something worthy of a change. I also mentioned the compatibility that I2 would get if it were on the same socket as Xeon which would imply that Itanium would be made better suited to run the same apps as xeon, or this would have no meaning.
You are aware switching from one ISA to another costs countless billions to our society ?
HyperThreading isn't the word here, its really a different (and vastly less complex) thing. You can't do simultaneous multithreading (like HT) if you can't do OoOE. Montecito will implement coarse grain multithreading, aka switch on event. it basically lets the cpu switch to another thread if a certain thread is stalled for too long (eg waiting for memory). Also, I've seen higher estimates of the performance boost it would bring, but time will tell
customers to x86 than they would gain from IBM or Sun. IOW, IPF will IMHO remain a niche product in a shrinking market.
it get better acceptance?.
With this amount of resources, they might as well put in the 30 million logic transistors required for a northwood like 32 bit processor on that chip. too bad the logic is so different.
Edit:Montecito will probably also go with DDR2; dual channel DDR2 667 should feed its bus happily. Edited by Mephistopheles on 07/25/04 11:19 PM.
All in all, I doubt Montecito will be enough to recapture the performance crown from Power5(+) which is not good. To establish a completely new ISA, you must demonstrate its advantages over its competitors, and there just aren't (m)any when you compare it to Power. I'd WAG intel/HP will be succesfull in capturing a large part of the (rather small) PA Risc and Alpha market, since those ISA's are discontinued, but I'd WAG they will loose more Brooklyn Dodgers Hat New Era
>plus a 33% increase on clock rates over current generation,
The advantage is pretty obvious, P4Man. When running code that has been written for it, itanium is a very powerful architecture.
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