Intel "Haswell" Speculation thread

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ShadowVVL

Senior member
May 1, 2010
758
0
71
Maybe since the cpu competition is dead they have started dumping money and research into other materials like fiber optic and Graphene to replace copper on the cpu.
 

tweakboy

Diamond Member
Jan 3, 2010
9,517
2
81
www.hammiestudios.com
6-8 physical cores
Higher clockspeed
Better IPC
Higher overclock potential
HT on all CPUs
Better IGP capable of crysis on medium/high
All CPU's unlocked
Lower load & idle power consumption

All for the low low price of £140!

This is what i expect from Haswell. Should my expectations be dashed i will look like this guy --> D:

Really ? Did they say 8 core,, I think haswell is only 6 core and 12 threads well the expensive version,, the rest are quads... 6 core will cost 600 dollars of not more.
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
106
Really ? Did they say 8 core,, I think haswell is only 6 core and 12 threads well the expensive version,, the rest are quads... 6 core will cost 600 dollars of not more.

LGA1150 is 4 cores, Haswell-E might be 8 cores for desktop users. Considering regular servers will be up to 10 cores.
 

BenchPress

Senior member
Nov 8, 2011
392
0
0
lol, is possible to die by hype? BenchPress is near of doing it XD
What hype? AVX2 doubles the throughput per core and enables widespread use of the SPMD programming model. That's the same high throughput computing approach as GPGPU, except on the CPU cores so it does not suffer from any heterogeneous overhead! And TSX offers long awaited hardware transactional memory and lock elision support, which are considered indispensable for efficient multi-core scaling. No hype there either.
dude...
there is nothing about AVX2, TSX in the link...
Please connect the dots. The Intel paper mentions ispc, which recently got support for AVX2.
 

Dresdenboy

Golden Member
Jul 28, 2003
1,730
554
136
citavia.blog.de
What hype? AVX2 doubles the throughput per core and enables widespread use of the SPMD programming model. That's the same high throughput computing approach as GPGPU, except on the CPU cores so it does not suffer from any heterogeneous overhead! And TSX offers long awaited hardware transactional memory and lock elision support, which are considered indispensable for efficient multi-core scaling. No hype there.
SIMD on CPU is not like GPGPU except for less complex algorithms. Both approaches have pros and cons. For example a Haswell core is still limited to 2 threads and a few YMM registers, while a GPU "core" (e.g. a SIMD array) can manage tens of threads w/ low overhead per single op while being able to keep ALUs busy most of the time with so many threads to choose from.

And HTM will help many multithreaded apps w/ shared data structures. Researchers found ~20% and higher improvements in typical algorithms when using simulations of ASF on K8/K10 Opterons.
 

Edrick

Golden Member
Feb 18, 2010
1,939
230
106
Will Windows 7 require another patch to handle the AVX2 instructions similar to SP1 which was required for AVX?
 

Olikan

Platinum Member
Sep 23, 2011
2,023
275
126
What hype? AVX2 doubles the throughput per core and enables widespread use of the SPMD programming model. That's the same high throughput computing approach as GPGPU, except on the CPU cores so it does not suffer from any heterogeneous overhead! And TSX offers long awaited hardware transactional memory and lock elision support, which are considered indispensable for efficient multi-core scaling. No hype there either.

Please connect the dots. The Intel paper mentions ispc, which recently got support for AVX2.

dude, are you sure that you don't work at intel?

you are remembering JF-AMD... IPC increases, IPC increases... AVX2 doubles, AVX2 doubles

i understand JF because that was his job...but...you?
 
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NostaSeronx

Diamond Member
Sep 18, 2011
3,706
1,233
136
AVX2 doubles Integer Vector ops but keeps Floating Point Vector ops the same.
256 bit (8 x 32 bit)* Floating Point and 256 bit (8 x 32 bit)* Integer.

*There is more configurations but this is for SP.

SIMT > SPMD, MIMD any day.
Will Windows 7 require another patch to handle the AVX2 instructions similar to SP1 which was required for AVX?
AVX/AVX2 are in the same category so probably not. AVX3 for Skylake and Skymont might as they will start using 512-bit FPUs.
 
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NostaSeronx

Diamond Member
Sep 18, 2011
3,706
1,233
136
AVX2 brings FMA, which would double float throughput if we get 2 256-bit units.
It doesn't exactly provide double float throughput in real world. It would be around no speedup to 1.5x speed up in run of the mill code. The ability to shoot out more integer vector ops is more beneficial than having the ability to do a multiply and an add within the same operation.
 
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BenchPress

Senior member
Nov 8, 2011
392
0
0
SIMD on CPU is not like GPGPU except for less complex algorithms.
Actually CPUs are more efficient at complex algorithms than GPUs...
Both approaches have pros and cons. For example a Haswell core is still limited to 2 threads and a few YMM registers, while a GPU "core" (e.g. a SIMD array) can manage tens of threads w/ low overhead per single op while being able to keep ALUs busy most of the time with so many threads to choose from.
Running many threads is not an advantage. Each thread only gets a tiny amount of cache space and the locality is poor due to the constant switching. Also, CPUs can use the L1 cache to store plenty of temporary variables so having few registers isn't an issue, while GPUs have to lower their thread count when running out of registers and thus their scheduling options diminish and they rapidly lose performance.
Researchers found ~20% and higher improvements in typical algorithms when using simulations of ASF on K8/K10 Opterons.
Have any products with hardware ASF support been announced yet?
 

BenchPress

Senior member
Nov 8, 2011
392
0
0
Will Windows 7 require another patch to handle the AVX2 instructions similar to SP1 which was required for AVX?
No, absolutely not.

Patches are required for instruction set extensions which add new registers, so that the OS saves/restores their values when switching between threads. AVX introduced new 256-bit registers, but AVX2 only consists of new instructions to operate on these registers. So no patch or service pack will be required.
 

BenchPress

Senior member
Nov 8, 2011
392
0
0
dude, are you sure that you don't work at intel?
Yes I'm sure. I don't work for Intel in any way.

In fact I don't care about companies or brands. I only care about technology. If AMD was advancing DLP extraction on the CPU or was launching products with ASF support, I would praise them for that. Unfortunately they are stagnating while Intel is pushing forward. So I have no choice but to talk about Intel's technology.
you are remembering JF-AMD... IPC increases, IPC increases... AVX2 doubles, AVX2 doubles
That's nowhere near comparable. It is a known fact that AVX2 features 256-bit integer vector instructions, hence doubling the peak throughput. And Haswell will also get fused multiply-add instructions, which "significantly increases peak flops". In fact it's easy to deduce that floating-point throughput will double as well. And to top it off it's also a known fact that AVX2 adds parallel memory access support (gather).

So please stop acting as if I'm making stuff up. Whether you like it or not, there's lots of evidence to support that Haswell will be quite revolutionary. In contrast, the AMD representative's claims of IPC increases were largely unfounded. It quickly became clear that single-threaded IPC could suffer, and if it didn't then there would be reduced utilization (read: waste) during multi-threaded operation. So claims of IPC increases received a lot of skepticism. Meanwhile I'd challenge you to find any reputable person who thinks Haswell will not double peak vector throughput or thinks TSX isn't going to play a key role in multi-threaded scaling.
 

Lepton87

Platinum Member
Jul 28, 2009
2,544
9
81
. Meanwhile I'd challenge you to find any reputable person who thinks Haswell will not double peak vector throughput or thinks TSX isn't going to play a key role in multi-threaded scaling.

That's the keyword. In practice we'll get nowhere near that, or do you think otherwise?
 

piesquared

Golden Member
Oct 16, 2006
1,651
473
136
Yes I'm sure. I don't work for Intel in any way.

In fact I don't care about companies or brands. I only care about technology. If AMD was advancing DLP extraction on the CPU or was launching products with ASF support, I would praise them for that. Unfortunately they are stagnating while Intel is pushing forward. So I have no choice but to talk about Intel's technology.

That's nowhere near comparable. It is a known fact that AVX2 features 256-bit integer vector instructions, hence doubling the peak throughput. And Haswell will also get fused multiply-add instructions, which "significantly increases peak flops". In fact it's easy to deduce that floating-point throughput will double as well. And to top it off it's also a known fact that AVX2 adds parallel memory access support (gather).

So please stop acting as if I'm making stuff up. Whether you like it or not, there's lots of evidence to support that Haswell will be quite revolutionary. In contrast, the AMD representative's claims of IPC increases were largely unfounded. It quickly became clear that single-threaded IPC could suffer, and if it didn't then there would be reduced utilization (read: waste) during multi-threaded operation. So claims of IPC increases received a lot of skepticism. Meanwhile I'd challenge you to find any reputable person who thinks Haswell will not double peak vector throughput or thinks TSX isn't going to play a key role in multi-threaded scaling.

So let me get this straight, you are going to wait another year, until intel releases a chip with FMA, then praise them for it. Meanwhile AMD will have had a chip out with FMA4 for 1 1/2 years, and one with FMA3 for well over 6 months....
 

Phynaz

Lifer
Mar 13, 2006
10,140
819
126
So let me get this straight, you are going to wait another year, until intel releases a chip with FMA, then praise them for it. Meanwhile AMD will have had a chip out with FMA4 for 1 1/2 years, and one with FMA3 for well over 6 months....

You just can't stay on topic topic can you? Everything has to be AMD vs the world for you.
 

aigomorla

CPU, Cases&Cooling Mod PC Gaming Mod Elite Member
Super Moderator
Sep 28, 2005
20,894
3,247
126
To be fair to Intel, aren't they kind of stagnated by lack of competition and lack of programers taking advantage of their advanced technology?

I mean thank (whatever power you believe in) that they are pushing ahead with the AZ plant....they could easily just re-fresh the same crap at higher base clocks if they really wanted to.

there is never a lack of technology.

Lets see if we recall the technology burst from 2004->2005 just 1 year, has more then double the advances we have now.

Do we need that much power? some do, some dont.
But is that why you end up getting high tier enthusiast line?
Who here was on a EE cpu and "required" that power?
Most of us got EE because it was an upgrade to the previous EE with a noticable amount...


Oh and incase ur wondering... i graduated hexcores..
The hexcore i have is awesome, has run great, keeps me competitive at clocks for 2 yrs now!!!

2 FREAKEN YEARS!

Is it too much to ask for a 8 core version?
Werent we suposed to have 8 cores by now?
What the hell happened to moor's law?

Oh it broke the moment AMD ran from the field..
 

Lonbjerg

Diamond Member
Dec 6, 2009
4,419
0
0
there is never a lack of technology.

Lets see if we recall the technology burst from 2004->2005 just 1 year, has more then double the advances we have now.

Do we need that much power? some do, some dont.
But is that why you end up getting high tier enthusiast line?
Who here was on a EE cpu and "required" that power?
Most of us got EE because it was an upgrade to the previous EE with a noticable amount...


Oh and incase ur wondering... i graduated hexcores..
The hexcore i have is awesome, has run great, keeps me competitive at clocks for 2 yrs now!!!

2 FREAKEN YEARS!

Is it too much to ask for a 8 core version?
Werent we suposed to have 8 cores by now?
What the hell happened to moor's law?

Oh it broke the moment AMD ran from the field..

Moore's law is still in effect...I think you misunderstand what Moore's law states...
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
106
there is never a lack of technology.

Lets see if we recall the technology burst from 2004->2005 just 1 year, has more then double the advances we have now.

Do we need that much power? some do, some dont.
But is that why you end up getting high tier enthusiast line?
Who here was on a EE cpu and "required" that power?
Most of us got EE because it was an upgrade to the previous EE with a noticable amount...


Oh and incase ur wondering... i graduated hexcores..
The hexcore i have is awesome, has run great, keeps me competitive at clocks for 2 yrs now!!!

2 FREAKEN YEARS!

Is it too much to ask for a 8 core version?
Werent we suposed to have 8 cores by now?
What the hell happened to moor's law?

Oh it broke the moment AMD ran from the field..

This might help you in your misunderstanding:
http://en.wikipedia.org/wiki/Moore's_law
 
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