AMD: Windows 7 Scheduler Update Brings 1% - 2% Performance Improvement

AMD Expects Only Windows 8 to Provide Tangible Performance Boosts

by Anton Shilov
01/11/2012 | 12:49 PM

Advanced Micro Devices has officially said that once Windows 8 is available, its central processing units (CPUs) based on Bulldozer micro-architecture would gain performance. Nonetheless, an updated scheduler for Windows 7, which officially became available recently, will barely significantly improve AMD FX-series chips, according to the company.


AMD claims that in initial testing of the upcoming Windows 8 operating system, its experts had seen performance improvements of up to 10% in some applications, when compared to Windows 7, since the operating system correctly recognizes the AMD FX processor architecture and cores.  Thanks to close collaboration between Microsoft and AMD, Microsoft recently completed back-porting some of the Windows 8 scheduler code for AMD FX processors into a hotfix for Windows 7. Nonetheless, that hotfix does not improve performance that substantially.

“Our testing shows that not every application realizes a performance boost. In fact, heavily threaded apps (those designed to use all 8 cores), get little or no uplift from this hotfix – they are already maxing out the processor. In other cases, the uplift averages out to a 1% - 2% uplift,” said Adam Kozak, a product marketing manager at AMD.

Currently, performance of AMD central processing units based on Bulldozer micro-architecture (FX, Opteron 4200-, 6200-series) under Windows 7 and Windows Server 8 R2 is slower than expected because the threading logic in the operating system is not optimized to use the simultaneous multithreading (SMT) scheduling feature of AMD Bulldozer processors. The update optimizes the performance of AMD's latest CPUs that power Windows 7-based or Windows Server 2008 R2-based computers.

Back in October, 2011, AMD issued a document claiming that with next-generation Windows 8 scheduler its eight-core microprocessors will receive 2% - 10% performance boost over what was demonstrated by Windows 7.