Java-Gaming.org    
Featured games (79)
games approved by the League of Dukes
Games in Showcase (477)
Games in Android Showcase (109)
games submitted by our members
Games in WIP (536)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: 1 [2]
  ignore  |  Print  
  Java 6-what we really got?  (Read 7084 times)
0 Members and 1 Guest are viewing this topic.
Online Riven
« League of Dukes »

JGO Overlord


Medals: 752
Projects: 4
Exp: 16 years


Hand over your head.


« Reply #30 - Posted 2007-01-02 20:22:32 »

Only the Core2 CPUs are actually doing 4 at the same time.

The others (AMD, Intel P4) are doing 2 pairs internally...

Next generation AMD will also do 4 in parallel.

Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings
Offline darkprophet

Senior Member




Go Go Gadget Arms


« Reply #31 - Posted 2007-01-02 20:30:27 »

really? How did our little SIMD instruction library give us a 4.2x speed increase when doing a SQRT on a P4 ?

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
Online Riven
« League of Dukes »

JGO Overlord


Medals: 752
Projects: 4
Exp: 16 years


Hand over your head.


« Reply #32 - Posted 2007-01-02 21:02:12 »

I realized that while it typed it, but the CPU specs say it does 2 pairs...

MUL/SUB/ADD/DIV were barely faster than factor 2, so appearantly SQRT is not only done in SIMD, but also calculated twice as fast...? Roll Eyes

Hi, appreciate more people! Σ ♥ = ¾
Learn how to award medals... and work your way up the social rankings
Games published by our own members! Check 'em out!
Legends of Yore - The Casual Retro Roguelike
Offline darkprophet

Senior Member




Go Go Gadget Arms


« Reply #33 - Posted 2007-01-02 21:04:41 »

that explains why everything other than SQRT was giving a 2.4x speed increase then! Yay, we finally have a proper explanation....

although why is SQRT so much faster under SSE2 then? Shocked

Friends don't let friends make MMORPGs.

Blog | Volatile-Engine
Offline Linuxhippy

Senior Member


Medals: 1


Java games rock!


« Reply #34 - Posted 2007-01-03 11:06:13 »

Only SIMD is for CPU's and SSE2/3 only support 4 data streams at 1 point while modern GPUs support 32 (the G80 supports 64 doesn't it ?

Well but the G80 is no CPU therefor ... its quite different.
I think the whole reorder, pipeline, SIMD stuff in todays processors is a big waste.
In how many percent all of the 4 integer units of a Core2 can be fad with a single instruction stream - I guess not in even 1% of total execution time all 4 units work - wasted silicon.

I know there are things that are hard to do in paralell programming, but I think a design with e.g. one Core2-Core and one Sun-T1 design side-by-side would be optimal.

lg Clemens
Pages: 1 [2]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

CogWheelz (18 views)
2014-07-30 21:08:39

Riven (23 views)
2014-07-29 18:09:19

Riven (15 views)
2014-07-29 18:08:52

Dwinin (12 views)
2014-07-29 10:59:34

E.R. Fleming (33 views)
2014-07-29 03:07:13

E.R. Fleming (12 views)
2014-07-29 03:06:25

pw (43 views)
2014-07-24 01:59:36

Riven (43 views)
2014-07-23 21:16:32

Riven (30 views)
2014-07-23 21:07:15

Riven (31 views)
2014-07-23 20:56:16
List of Learning Resources
by SilverTiger
2014-07-31 18:29:50

List of Learning Resources
by SilverTiger
2014-07-31 18:26:06

List of Learning Resources
by SilverTiger
2014-07-31 13:54:12

HotSpot Options
by dleskov
2014-07-08 03:59:08

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:58:24

Java and Game Development Tutorials
by SwordsMiner
2014-06-14 00:47:22

How do I start Java Game Development?
by ra4king
2014-05-17 11:13:37

HotSpot Options
by Roquen
2014-05-15 09:59:54
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!