Microsoft Rereleases Update to Improve Bulldozer... yeah.

Subject: General Tech, Processors | January 11, 2012 - 06:21 PM |
Tagged: windows, processor, microsoft, cpu, bulldozer, amd

Let us take a little break from the CES news with a load of bull -- a download of Bulldozer. If you have an eerie sense of being in this situation before then you may in fact have a bad memory as it did in fact happen and it was only about a month ago. Microsoft released an update in mid-December to optimize their operating systems for AMD Bulldozer technology; that patch disappeared without any listed reason. As of today, we have access to both the patch as well as most of the reason for the delay in the first place.

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You know: part of me wants to see a Bulldozer go 100MPH, and another part of me fears greatly.

The first order of business is to explain to those who have an AMD FX series, Opteron 4200 series, and/or an Opteron 6200 series processor how to increase their potential performance: KB 2646060 and KB 2645594 each contain a patch which will optimize Windows to the Bulldozer architecture for most users when both are applied.

It turns out that Microsoft pulled the Bulldozer update last month when discussions with AMD revealed that the patch would not provide the promised performance increases for most users. The problem specifically centers on the Core Parking feature within Windows 7 and Windows Server 2008 R2: after the hotfix in December was applied, Core Parking would still interfere with Bulldozer’s design by attempting to save power and sleep cores that were unused without understanding that Bulldozer cores are not typical cores. With Core Parking disabled for Bulldozer-based CPUs either through this hotfix or by changing your performance profiles to “High Performance” from the often default “Balanced” you would allow Bulldozer to run as it actually desires to run. According to how these bulletins are worded, should you have been on “High Performance” profile back in December before the hotfix was pulled you would have experienced what should only have been available starting today.

These performance increases are not for every application, however. AMD has stated that applications which are more sparsely multithreaded would benefit most from the update.

Workloads that are moderately threaded have the potential for uplift. This could include virtualization, database, or transactional environments that are “bursty” – a mixture of light and heavy transactions, or legacy applications that are by nature not very threaded. The more heavily threaded the application, the less the likely the uplift.

My intuition knowing this as well as the Core Parking issue is that once Windows finally wakes the Bulldozer core, your experience is maximal with the December patch; applications which only temporarily become multithreaded either do not wake the proper portions of the processor or wake the processor in time to be of maximum benefit.

It appears as if the removal of the hotfix last month was simply because AMD believed that while the patch was effective, it would not be correctly applied to the vast majority of customers without a second hotfix and thus give the appearance of little to no real benefits.

Source: AMD Blogs

January 11, 2012 | 08:42 PM - Posted by Anonymous (not verified)

This is why I just built a 2500k.

January 11, 2012 | 09:06 PM - Posted by mAxius

go home troll i nor others care about the who what and why you built your current rig. its sad when AMD does something to try to address a performance issue or when somebody asks a question about AMD cpu's and all you get back is you should buy intel.......on and on.....ok enough already is just a cpu not end of the world............

direct link provided to the update

January 11, 2012 | 11:59 PM - Posted by Anonymous (not verified)

the only trolls are the butthurt amd fans.

January 12, 2012 | 08:17 AM - Posted by Prodeous (not verified)

It is amazing that everyone forgets the original issues Intel had with Hyperthreading on their P4. Decrease performance by 40% or there abouts? Untill Windows was optimized for Intels Hyperthreading. It is amazing that all Intel fans forget this.

Second part is how Intel used its monopoly to force companies to by Intel and Intel only, even though at that time AMD had a much better product. Thanks to this action Intel finances grew to a point where they managed to get a lot of Developers working and developing the amazing Pentium M which began the era of Intel's engineering growth.

This and AMD's aquissition of ATI changed its focus, and rightfully so as the 7970 with its GCN core is an amazing product.

For the Bulldozer, 4 core with "AMD's Hyperthreading" it will take time for platforms and software to catch up, just like it did with Intel. So please remember the history. For Both AMD and INtel fans.

I my self am an AMD fan, but when anyone asks me what to get I tell them Intel 2500K and 2600K as simply they are supperior. For my self, I'll stick to 1090T untill Piledriver.

January 16, 2012 | 06:21 PM - Posted by Anonymous (not verified)

Ditto. I waited 6 months for Bulldozer's release to find out it wasn't good. So I built an Intel 2500K System on an Asus Maximus IV Extreme-Z with two GTX 580's.

January 11, 2012 | 09:24 PM - Posted by The_Koups (not verified)

But even with this increase and what not I can't see that x86 programmes will run that much better. I say this coz intel own the major x86 instruction sets. But I do like how both AMD and MICROSOFT came together to try to resolve the performance issue. But even so I'm still going to wait until the FX8170 hits the market.

January 11, 2012 | 10:51 PM - Posted by Scott Michaud

Owning the patent is very different from creating the best product. This is greatly evident during the NetBurst era. Intel of course has a massive advantage at the moment, but that's not because they own the patents.

January 11, 2012 | 11:33 PM - Posted by Lou (not verified)


January 16, 2012 | 06:21 PM - Posted by Anonymous (not verified)

Bulldozer is no better than their old 1100T 6 core processor.

January 12, 2012 | 11:41 AM - Posted by algernon (not verified)

"I say this coz intel own the major x86 instruction sets." I do beg you pardon but even though they originated the X-86 instruction set it is open source provided just like AMD came up with the X64 bit instruction set to run on the 1st Athlon 64bit processors.If you remeber Intel was still hopping along on X86 and using the Itanium 64 instructions while AMD was hasnding their but to them in the server markets.

January 12, 2012 | 02:15 PM - Posted by Anonymous (not verified)

Link to both updates:

December 18, 2012 | 07:38 PM - Posted by Roma Vuncannon (not verified)

Real nice layout and wonderful articles, nothing else we need :D.

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