Overclock.net › Forums › AMD › AMD CPUs › The problem with Bulldozer...
New Posts  All Forums:Forum Nav:

The problem with Bulldozer... - Page 11

post #101 of 121
Quote:
Originally Posted by Phantom_Dave;15295524 
That's only one example (also an AMD example, not Intel). Intel's track record has shown considerable improvement in processors over the shrinking of dies.

Smaller dies means lower voltage, less heat, and the ability to squeeze more cores in the same space. Even if it was equal to SB in processing, it would still be a much much better chip...

Yes, it does, but architectures hit limits in clock speeds and don't tend to go any faster, SB tends to around 5.5Ghz, while Ivy will probably give a higher average OC (Closer to the 5.5Ghz limit) it won't be as higher as everyone keeps saying, it's true of any architecture, Intels have tended to be higher than AMDs, but the last Pentium 3s were great examples, they didn't clock much higher than 1.3Ghz iirc.
Quote:
Originally Posted by MediaRocker;15295502 
I'm thinking AMD may have to abandon bulldozer (they've sunk how much into BD's development?) and try a new approach. But that's just my opinion.

Nah, there's not too many issues for a new CPU architecture, I reckon Piledriver will fix it, if not just fix most of it.
Quote:
Originally Posted by Blameless;15296737 
The CPU doesn't pull 500w alone.

Any test that shows this has either been misinterpreted, or is not showing only CPU power consumption.

Nothing outside of very high-end water, heavy duty phase, or a DICE/LN2 pot is going to be able to move 500w of heat away from a CPU.

500w on air, or more modest water, would result in a CPU being far to hot to test.

It's why I think there's seriously a massive bug somewhere, they used Kill-A-Watts to measure the energy taken from the wall, that power has to go somewhere...
Quote:
Originally Posted by MediaRocker;15297367 
In addition, there's only a slight increase in performance per core addition...

Not for me, if it takes roughly 30 seconds to convert one song from FLAC to MP3 or Ogg using foobar2000s transcoding tool and lame or oggenc, then another core enables the use of one more song per conversion.
Quote:
Originally Posted by pursuinginsanity;15295752 
All of this is well and fine, but it ISN'T going to improve BD's biggest problem (IMO) - single threaded performance. Sure, it will improve (could improve) multi-threaded performance, but no matter what, single thread perf stinks. And you can't blame that on the modular design - when only a single thread is used, it's got control of the whole module.

No matter how many times JF-AMD promised IPC increases the reality is quite the opposite. (funny how that works.. people who work in marketing, yeah, that's their job, but he was -lying-)

BD at 3.6+ is slower thread for thread than a Deneb or Thuban at lower clocks. No amount of Windows 8 "gonna change everything" is gonna change anything.

Software can help this to a point, but that comes down to the cache issues IMO, the latency is far too high and AMD forgot the lesson the Celeron-A and Pentium II taught us, in caching, bigger is better, but faster is better yet. (Celeron-A had 128k of full speed on die cache, Pentium II had 256k of half speed off die cache)
Quote:
Originally Posted by wedge;15300607 
Okay, I've just re-read several of the review articles. I admit I mostly skimmed through them the first time (hey it was a lot to read!)

Anyway, page 3 from Anandtech really does make a lot of sense.

Long story short is: People who say Bulldozer is AMD's Pentium 4... are right!
AMD thought they were smarter than Intel, and tried to implement BD in a similar way as the P4. And low and behold they're getting the same results: worse IPC and higher power consumption.

Apparently AMD meant to at least maintain the same IPC as the PII, and also manage much higher base clocks (like ~4.3GHz). But they didn't achieve either of those goals. If they had, BD would be much better competition for SB in all aspects.

Well, hopefully AMD at least knows why they didn't get what they wanted. And if so, they should be able to right the wrongs in Piledriver.
The problem then becomes (as many others have pointed out), it won't be Sandy Bridge anymore, instead they'll have to compete with Ivy Bridge...

Indeed, at the moment its limited dramatically by cache speeds and size as well as software, we'll see performance increase as both are fixed/optimized, this is why it doesn't actually increase in speed that much when you OC, you'd gain less per clock than say, SB, but you should be able to clock far higher.
    
CPUMotherboardGraphicsRAM
Intel Core i5 3570k @ 4.5Ghz ASRock Z77 Pro3 Powercolor Radeon HD7950 3GB @ 1150/1350 4x4GB G.Skill Ares 2000Mhz CL9 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 250GB Western Digital Black 1TB WD1002FAEX Seagate Barracuda 3TB ST3000DM001 Samsung Spinpoint EcoGreen 2TB 
Optical DriveCoolingCoolingCooling
Pioneer DVR-220LBKS Noctua NH-D14 Scythe Gentle Typhoon 1850rpm Corsair AF140 Quiet Edition 
CoolingOSMonitorMonitor
Arcitc Cooling Acclero Twin Turbo II Arch Linux x86-64, amdgpu BenQ G2220HD BenQ G2020HD 
KeyboardPowerCaseMouse
Ducky Shine III Year of the Snake, Cherry Blue Silverstone Strider Plus 600w CoolerMaster CM690 II Black and White SteelSeries Sensei Professional 
Mouse PadAudioOther
Artisan Hien Mid Japan Black Large ASUS Xonar DX NZXT Sentry Mesh 30w Fan Controller 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
Intel Core i5 3570k @ 4.5Ghz ASRock Z77 Pro3 Powercolor Radeon HD7950 3GB @ 1150/1350 4x4GB G.Skill Ares 2000Mhz CL9 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 250GB Western Digital Black 1TB WD1002FAEX Seagate Barracuda 3TB ST3000DM001 Samsung Spinpoint EcoGreen 2TB 
Optical DriveCoolingCoolingCooling
Pioneer DVR-220LBKS Noctua NH-D14 Scythe Gentle Typhoon 1850rpm Corsair AF140 Quiet Edition 
CoolingOSMonitorMonitor
Arcitc Cooling Acclero Twin Turbo II Arch Linux x86-64, amdgpu BenQ G2220HD BenQ G2020HD 
KeyboardPowerCaseMouse
Ducky Shine III Year of the Snake, Cherry Blue Silverstone Strider Plus 600w CoolerMaster CM690 II Black and White SteelSeries Sensei Professional 
Mouse PadAudioOther
Artisan Hien Mid Japan Black Large ASUS Xonar DX NZXT Sentry Mesh 30w Fan Controller 
  hide details  
Reply
post #102 of 121
Quote:
Originally Posted by oicw;15302296 
Problem is, the way AMD is going right now, Intel can sit back and take a long nap before it has to do anything.

BD is proving to be anything but a challenge to Intel.

Been there, done that and probably own the T-Shirt - somewhere.

I remember when all the benchmarks were optimized for Intel but the real world AMD performance kicked butt. It has happened more than once over the years. I used to sit people down at two systems and challenge them to tell which is faster and more compatible. (compatibility was an issue 30 years ago)

As a AMD fan since the first Intel/AMD lawsuit, I have been on top and feeling a little low. Reading what is coming next for AMD, the possible OS improvements, I am feeling pretty good about AMD's prospects. If we don't beat them with Bulldozer you know they will be working overtime to get ahead next time.

The OC numbers being reported on these puppies are also encouraging. Might even kick mine up a little. I want to go as fast as possible without blowing the thing up.

As an old street racer, winning every time wasn't necessary, just as long as you were racing. And whether you won or lost, the two fastest guys had a respect for each other and the crowd for both of them. . . because everyone understood that the number two guy was just one mod away from winning the next time out.

Rickman
Bulldozer Ready
(13 items)
 
  
CPUMotherboardGraphicsRAM
X6 1100T Asus 990FX Sabertooth 6570 x2 16GB DDR3 1866 
Hard DriveOptical DriveOSMonitor
WD Raptor, Vertex 3, (Two Vertex 3's gave BSOD) 2) Blue Ray Windows 7 64 Pro - Centos under VMware 2)1900x1200 + 2)1600x1200 - All Samsung 
PowerCase
650W Corsair CM Storm Scout 
  hide details  
Reply
Bulldozer Ready
(13 items)
 
  
CPUMotherboardGraphicsRAM
X6 1100T Asus 990FX Sabertooth 6570 x2 16GB DDR3 1866 
Hard DriveOptical DriveOSMonitor
WD Raptor, Vertex 3, (Two Vertex 3's gave BSOD) 2) Blue Ray Windows 7 64 Pro - Centos under VMware 2)1900x1200 + 2)1600x1200 - All Samsung 
PowerCase
650W Corsair CM Storm Scout 
  hide details  
Reply
post #103 of 121
Quote:
Originally Posted by Darkstalker420;15291208 
I'm the biggest AMD fan i know:p and have built NOTHING else since the TBird 1000mhz Socket A and i'm so underwhelmed with BD's performance it almost stings!!!

Thanx.

Pleased to meet you... I've been building nothing but AMD Since the Athlon SLOT A 750... That I had to Crack the case off of, and install a Gold Fingers device and use a Floppy drive to boot M-Athlon to Overlock the pig. Ah the love-hate relationship.

I half expected The First Iteration of Bulldozer to Turn out this way. It took a Generation and 3 Steppings to make the Phenom Workable.... even though my Phenom 9950 Overclocked just as good as my PhII 965 c3... on water.

I plan on running my Current rig For AT LEAST another 6 months. If not a year. Since I killed my 4870x2 and Installed 2x6850 CF-X I've been happy with the video performance. It plays the SWTOR beta quite nicely on High at 1680x1050 so I'm happy for now. And While it might take a while to Decompress a 6 GB movie or whatever. I still think back to the days of my Old Athlon Slot A Running 800 (and change) mhz, and Remember how long it took to Convert an MP3 BACK to .wav to burn onto a Disk (ya there was a time when you had to do it manually) ... god DAMN that thing was SLOW compared to this. You younger guys that have only been building for 2-5 years have NO IDEA how well you have it.

Us older feller's can tell you what a 486DX and 512KB of ram runs like... Ah Risc Architecture has come a long way...

Now we have CISN chips on the horizon and Project Denver working its way into Windows 8 and the Next MAC OS flavor. We really are living in exciting times to be geeks.
Hyperion
(20 items)
 
   
CPUMotherboardGraphicsRAM
I7-3930k Rampage IV Formula EVGA GTX670 FTW 2xSLI 4x4 Corsair vengeance  
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 Samsung 840 Pro Seagate Barracuda  LG Bluray Burner W/modisc 
CoolingCoolingCoolingCooling
Xspc raystorm  Xspc Rx360 Mcp655 Swiftech 220 
CoolingOSMonitorKeyboard
Cougar hydro-bearing fans @1200 rpm x 5 Windows 8 Pro 64 Asus VG278H G15 
PowerCaseMouseAudio
AXP XION 1000 watt Xigmatek Elysium Death Adder On board 
CPUMotherboardGraphicsRAM
PhenomII 965c3 @ 4.2 (so far) Asus Crosshair III formula RoG 2xSaphire HD6850 CF-X 8Gb Mushkin Blackline 7-7-7-20 
Hard DriveOptical DriveOSMonitor
WD Caviar 320GB, Seagate Baracuda 1TB LiteOn DVD Multi 16/48x Vista and Windows7 ULT 64 LG W2252TQ 1680x1050 
KeyboardPowerCaseMouse
Logitech g15 CM Real Power 850 CM Stacker RC 810 Death Adder 
Mouse Pad
Big and Black 
  hide details  
Reply
Hyperion
(20 items)
 
   
CPUMotherboardGraphicsRAM
I7-3930k Rampage IV Formula EVGA GTX670 FTW 2xSLI 4x4 Corsair vengeance  
Hard DriveHard DriveHard DriveOptical Drive
Crucial M4 Samsung 840 Pro Seagate Barracuda  LG Bluray Burner W/modisc 
CoolingCoolingCoolingCooling
Xspc raystorm  Xspc Rx360 Mcp655 Swiftech 220 
CoolingOSMonitorKeyboard
Cougar hydro-bearing fans @1200 rpm x 5 Windows 8 Pro 64 Asus VG278H G15 
PowerCaseMouseAudio
AXP XION 1000 watt Xigmatek Elysium Death Adder On board 
CPUMotherboardGraphicsRAM
PhenomII 965c3 @ 4.2 (so far) Asus Crosshair III formula RoG 2xSaphire HD6850 CF-X 8Gb Mushkin Blackline 7-7-7-20 
Hard DriveOptical DriveOSMonitor
WD Caviar 320GB, Seagate Baracuda 1TB LiteOn DVD Multi 16/48x Vista and Windows7 ULT 64 LG W2252TQ 1680x1050 
KeyboardPowerCaseMouse
Logitech g15 CM Real Power 850 CM Stacker RC 810 Death Adder 
Mouse Pad
Big and Black 
  hide details  
Reply
post #104 of 121
Quote:
Originally Posted by SeigiSama;15303137 

I plan on running my Current rig For AT LEAST another 6 months. If not a year. Since I killed my 4870x2 and Installed 2x6850 CF-X I've been happy with the video performance. It plays the SWTOR beta quite nicely on High at 1680x1050 so I'm happy for now. And While it might take a while to Decompress a 6 GB movie or whatever. I still think back to the days of my Old Athlon Slot A Running 800 (and change) mhz, and Remember how long it took to Convert an MP3 BACK to .wav to burn onto a Disk (ya there was a time when you had to do it manually) ... god DAMN that thing was SLOW compared to this. You younger guys that have only been building for 2-5 years have NO IDEA how well you have it.

Us older feller's can tell you what a 486DX and 512KB of ram runs like... Ah Risc Architecture has come a long way...

Now we have CISN chips on the horizon and Project Denver working its way into Windows 8 and the Next MAC OS flavor. We really are living in exciting times to be geeks.

absolutely!!!! 10-15 minute download times included or wait the 6 hours and 24 minutes to download AOL 8.
I welcome the new AMD chip.... oh well it flops synthetics.....real world use will never notice the difference in single threads....
multi thread use will be much better
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
phIIx4 960 asrock990 extreme 3 6850 x2 xfx AMD highperformane 1600 
Hard DriveOptical DriveCoolingOS
1 tb seagate 2 asus mastercool tower win 7 64 
MonitorKeyboardPowerCase
lg 42" 1080p tv strike 5 xfx 650 gold silverstone raven 
MouseMouse Pad
cyborg rat 7 mmo ocz giant 
  hide details  
Reply
My System
(14 items)
 
  
CPUMotherboardGraphicsRAM
phIIx4 960 asrock990 extreme 3 6850 x2 xfx AMD highperformane 1600 
Hard DriveOptical DriveCoolingOS
1 tb seagate 2 asus mastercool tower win 7 64 
MonitorKeyboardPowerCase
lg 42" 1080p tv strike 5 xfx 650 gold silverstone raven 
MouseMouse Pad
cyborg rat 7 mmo ocz giant 
  hide details  
Reply
post #105 of 121
Quote:
Originally Posted by PsikyoJebus;15294648 
Well I read this whole thread and it was very informative to be honest, despite the fanboys that have nothing of interest to say than what has already been said 100+ times on this forum. First of all, to all the haters, please understand that on this forum, some people are interested in more than just whether chip A beats chip B. Not all of us care about having the best BF3 equipped PC and nothing else.

Despite the fact that the performance is lacking, this chip may be a lot of fun to overclock and tweak around. I buy AMD because I love to fiddle around with the BIOS (UEFI soon) settings and see what makes my chip tick. I learn a lot about my system from doing this and I find it to be more rewarding than running this or that game on max settings or improving my k/d ratio on some random game. I really don't care if I'm losing 40 fps in some mediocre game that my current chip is already pulling 60+ fps on. That being said, I found this thread interesting because there are other people, like me, who also love to mess around with the cpu settings beyond bumping up clock speed rates and calling it a day. I really hope that the overclocking community finds out what's wrong with this chip and how the performance and power consumption issues can be addressed, so that one day, perhaps the people at AMD can see what we've done and incorporate such changes in the form of a hotfix or implement them in their next product.

Amen. Are we not all on overclock.net? What this person says rings so true. This site is all about enthusiast computing - the great rewarding aspect of tweaking and squeezing every drop from the hard earned dollars we spent on our hardware. Its a hobby, just like gaming or model trains. This whole epic of fanboy wars has got to stop, seriously. I am really looking forward to my 8120 arriving tomorrow, as a replacement (if not upgrade) for my 1100t....Not because I am expecting a sandy bridge killer. But because I'm expecting great joy and fun in discovering how it works, how I can make it better as an end user/enthusiast and what we, as a community, might be able to contribute to future improvements.

Just like the opensource community often times schools commercial software developers about how good software should look, the enthusiast community can (and does) also pull a lot of weight in hardware.

EDIT: Also wanted to say, the reason I choose AMD is that, to me, it is not as fun or rewarding to overclock a chip that's already the fastest in the world. When I took my 1100t and saw my Cinebench score come back at 7.24 just OCing on air, and the 6200 physics score in 3dmark 11 or the 14455 knps from fritz chess...Now that...That is the good stuff biggrin.gif Just like I saw the streetracer analogy above, there is no function or purpose in me doing this. People don't put 10000$ into a Honda Civic engine so they can get to work faster. I do not do 3d rendering, photoshop or anything else. I'm an enthusiast and I do it because I can and for the thrill of the race! Benefits my life in absolutely no way and my gasmileage (power consumption) is terrible! To put it into perspective: a small part of me was glad BD underperformed - gives me a new challenge. When I saw the first reviews, I was thinking to myself, "Oh, screw that...I bet I can make it fly"!
Edited by regimen - 10/14/11 at 2:45am
    
CPUGraphicsOSMonitor
i7-6820HK GTX980M Windows 10 Home Microboard M340CLZ 
KeyboardCaseMouseMouse Pad
MSI GK-701 Laptop Mionix Naos 7000 Mionix Sargas 
  hide details  
Reply
    
CPUGraphicsOSMonitor
i7-6820HK GTX980M Windows 10 Home Microboard M340CLZ 
KeyboardCaseMouseMouse Pad
MSI GK-701 Laptop Mionix Naos 7000 Mionix Sargas 
  hide details  
Reply
post #106 of 121
Quote:
Originally Posted by SeigiSama;15303137 
Pleased to meet you... I've been building nothing but AMD Since the Athlon SLOT A 750... That I had to Crack the case off of, and install a Gold Fingers device and use a Floppy drive to boot M-Athlon to Overlock the pig. Ah the love-hate relationship. . . . . . .

You made me move brain cells that I have not moved in decades. I had a Slot A Athlon and did the same mod. Killed the chip and the motherboard - I was depressed for a month.

My killer system from the old days was a Zenith Z-1000, 386 multiprocessor running SCO Unix. We were a dealer for them, never really sold more than a couple, but the power under the hood - 6) 16MHz 386's, up to 64MB of ECC ram. I think it would run 128 terminals. (I actually overclocked a 486 version with Corollary boards and AMD chips)

Of course it had the same problem as the Bulldozer, on single threaded tasks a kid with one of those newfangled 486's could beat it every time. But the old Z-1000 would not slow down with dozens of terminals banging away at it and that was its long suit.

I think I have moved too many old brain cells for one day.

Rickman
Edited by RickmanCBR - 10/14/11 at 2:27am
Bulldozer Ready
(13 items)
 
  
CPUMotherboardGraphicsRAM
X6 1100T Asus 990FX Sabertooth 6570 x2 16GB DDR3 1866 
Hard DriveOptical DriveOSMonitor
WD Raptor, Vertex 3, (Two Vertex 3's gave BSOD) 2) Blue Ray Windows 7 64 Pro - Centos under VMware 2)1900x1200 + 2)1600x1200 - All Samsung 
PowerCase
650W Corsair CM Storm Scout 
  hide details  
Reply
Bulldozer Ready
(13 items)
 
  
CPUMotherboardGraphicsRAM
X6 1100T Asus 990FX Sabertooth 6570 x2 16GB DDR3 1866 
Hard DriveOptical DriveOSMonitor
WD Raptor, Vertex 3, (Two Vertex 3's gave BSOD) 2) Blue Ray Windows 7 64 Pro - Centos under VMware 2)1900x1200 + 2)1600x1200 - All Samsung 
PowerCase
650W Corsair CM Storm Scout 
  hide details  
Reply
post #107 of 121
Quote:
Originally Posted by Sauerkraut;15291090 
thread will be overrun with AMD sucks very soon, and its a pity because it could lead to a very intelligent interesting conversation instead.

People are idiots. red vs. blue. black vs. white. People like to hate. people are blind to the fact that being a fanboy is pointless. AMD has there flaws, and intel has theres. but how can a company grow, when it struggles to compete with a company that owns 80% market share and pays companies off? intel is in court every week.

our chips are 1-3 years old anyway. Govs, militarys, get development priority.
Air Force 1
(17 items)
 
  
CPUMotherboardGraphicsRAM
i5 7600k @4.8 ASUS z170 Sabertooth S EVGA GTX 980ti Ref 2x8gb Ripjaw-X @3200 
Hard DriveHard DriveHard DriveOptical Drive
WD 2tb Black WD 1tb Blue Sandisk 120 Asus 
CoolingOSMonitorKeyboard
CM Nepton 280L Windows 10 x64 lg 34uc69g-b Patriot v760 
PowerCaseMouseMouse Pad
OCZ ZX 850 Phanteks Entho Pro Green Mionix Naos 7000 Custom 36"x12" starcitizen mat 
Audio
Dayton BR-1 
  hide details  
Reply
Air Force 1
(17 items)
 
  
CPUMotherboardGraphicsRAM
i5 7600k @4.8 ASUS z170 Sabertooth S EVGA GTX 980ti Ref 2x8gb Ripjaw-X @3200 
Hard DriveHard DriveHard DriveOptical Drive
WD 2tb Black WD 1tb Blue Sandisk 120 Asus 
CoolingOSMonitorKeyboard
CM Nepton 280L Windows 10 x64 lg 34uc69g-b Patriot v760 
PowerCaseMouseMouse Pad
OCZ ZX 850 Phanteks Entho Pro Green Mionix Naos 7000 Custom 36"x12" starcitizen mat 
Audio
Dayton BR-1 
  hide details  
Reply
post #108 of 121
So right now, if you start a task that uses 2 threads, will they end up getting put into core 1 and 2?

I keep saying this over and over; I think it is amazing that Zambezi achieved the lever of performance that it did given all the things stacked up against it.
    
CPUMotherboardGraphicsRAM
i5 2500K MSI P67A-G43 MSI GTX 460 Cyclone Ripjaws X 
Hard DriveHard DriveOptical DriveOS
Vertex 2 WD Green ASUS Windows 7 
PowerCase
Antec TruePower New 750 HAF 922 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i5 2500K MSI P67A-G43 MSI GTX 460 Cyclone Ripjaws X 
Hard DriveHard DriveOptical DriveOS
Vertex 2 WD Green ASUS Windows 7 
PowerCase
Antec TruePower New 750 HAF 922 
  hide details  
Reply
post #109 of 121
Quote:
Originally Posted by racer86;15291279 
threw this question up in the bulldozer thread but no one answered

why does it perform miles ahead on boards other than asus the tests done not on an asus board looked pretty good (right between 2600k and 2500k) right where most of us expected it hell even the power consumption is almost halved on other boards

is there a problem with the asus bios that no one is noticing???

Very Interesting Point. I have seen the Review at HardwareHeaven and the results are interesting to say the least, and make bulldozer seem much more respectable.
    
CPUMotherboardGraphicsRAM
AMD Athlon 64 3800+ Windsor Asrock N68C-S UCC XFX 8500GT Passive Cooled 2x Hynix 512MB DDR2 533MHz 
Hard DriveOptical DriveOSMonitor
Seagate 500GB SATA LG Supermulti SATA Lightscribe Debian Sid AMD64/Windows XP x86 Dell 17" TFT 
KeyboardPowerCaseMouse
CTC Keyboard PS2 Antec Basiq 350W Casecom KB-7760 Cheesegrater Logitech Mouse PS2 
Mouse Pad
F1 Magazine 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
AMD Athlon 64 3800+ Windsor Asrock N68C-S UCC XFX 8500GT Passive Cooled 2x Hynix 512MB DDR2 533MHz 
Hard DriveOptical DriveOSMonitor
Seagate 500GB SATA LG Supermulti SATA Lightscribe Debian Sid AMD64/Windows XP x86 Dell 17" TFT 
KeyboardPowerCaseMouse
CTC Keyboard PS2 Antec Basiq 350W Casecom KB-7760 Cheesegrater Logitech Mouse PS2 
Mouse Pad
F1 Magazine 
  hide details  
Reply
post #110 of 121
Quote:
Originally Posted by mad0314;15308281 
So right now, if you start a task that uses 2 threads, will they end up getting put into core 1 and 2?

I keep saying this over and over; I think it is amazing that Zambezi achieved the lever of performance that it did given all the things stacked up against it.

Well, most schedulers have core affinity and tend to go in order from core 0--7 or 1-8 depending on how they number them.

BD looks like it wants to be sechduled core 1,3,5,7 then core 2,4,6,8

or conversly with 8 threads

module a b d c
core a1 a2 a3 a4
core b5 b6 b7 b8

so that each thread gets dispatched sequentially. to each module and then to each core. So the threading would go module,core module core sequentially from module A to module c. that might reduce resource contention in the front end where it appears the L1 and decoder may be getting overwhelmed. The idea would be to never put 2 thread into the same module front end at exactly at the same time.

I am getting a fx4100 to try this myself in a few weeks.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD CPUs
Overclock.net › Forums › AMD › AMD CPUs › The problem with Bulldozer...