Microsoft Releases Hotfix to Improve Performance of AMD Bulldozer CPUs

Microsoft Releases Hotfix to Improve Performance of AMD Bulldozer CPUs

Microsoft has released software patches for Windows 7-based and Windows Server 2008 R2-based systems powered by AMD's Bulldozer CPUs. These hotfixes are suppose to optimize the performance of Bulldozer CPUs on these systems. The Redmond company did not make these patches publicly available as written requests need to be submitted in order for Microsoft Support to release the appropriate hotfixes.

In this example, Thread 1b depends on data from Thread 1a; however, it is scheduled on a different Core module from Thread 1a on the Bulldozer CPU. In this scenario, as all the cores are active, the Max Turbo Mode cannot be enabled.

Microsoft has admitted the performance of AMD Bulldozer CPUs is slower than expected. This is because the threading logic of the operating systems, Windows 7 and Windows Server 2008 R2, is not optimized to use the the Simultaneous Multithreading (SMT) scheduling feature which was introduced in the Bulldozer family of AMD CPUs. According to Microsoft, after the successful application of the patches, these systems with their installed Bulldozer CPUs will operate at the expected performance level.

After application of the patches resulting in optimization of the Windows operating systems, dependent threads like Threads 1a and 1b will be scheduled on the same core module. The unused core modules are parked so that AMD Turbo Core is enabled for optimal performance.

The support page did not specify any empirical measurements of the performance gains after the successful application of the software patches. In order to apply these patches, the host computer must be running running Windows 7 Service Pack 1 (SP1) or Windows Server 2008 R2 Service Pack 1 (SP1).

Source: Microsoft, AMD

All News Categories

News for Past 12 Months

Subscribe to HWZ Here!

Subscribe now to receive latest tech news, articles and promotions straight to your inbox!
By signing up, you indicate that you have read and agreed to the and .

Obsessed with technology?
Subscribe to the latest tech news as well as exciting promotions from us and our partners!
By subscribing, you indicate that you have read & understood the SPH's Privacy Policy and PDPA Statement.