These tweaks are completely safe for well-designed PCs. YMMV, but I wouldn’t have written this utility if I didn’t see a real significant performance improvement after disabling core parking. AMD’s secondary logical core is almost a complete CPU. Microsoft has optimized for Intel’s HyperThreading, which has a much less powerful secondary core. This is probably due to the dramatically different way AMD processors share (hardware) computational resources across logical cores. In our testing, we found that AMD processors benefit the most from disabling core parking. However, Windows is often too aggressive with core parking, causing excessive delays when cores are unparked to accommodate peak loads (the most common type of CPU load). There are many factors that determine effectiveness on a particular system, such as CPU type, application load, and user behavior. EfficacyĮmpirical evidence shows that disabling core parking makes a big difference in system performance. Only disable parking for high performance power plans. And this is exactly the desired optimization for most users. So, for example, you can turn off core parking for the High Performance power plan and leave it on for the other plans. Many complex parameters control when to stop the core, and Microsoft has made significant adjustments to save power.Ĭentral Park settings in Windows are implemented as parameters in power plans (also known as power profiles). They were interested in saving energy, even if it meant slightly lower performance. The problem is that the default Windows power profile is configured aggressively, especially with respect to parking cores on workstations. This technology is very similar to frequency scaling in that it tries to throttle the CPU when it is idle. When the CPU load increases again, the disabled cores are re-enabled. Core parking dynamically disables CPU cores to save power when idle. Core ParkingĬore parking is a hibernation (C6) state supported by most new x86 processors and newer editions of Windows. Bitsum developed ParkControl because core parking settings are hidden in Windows, but can make such a large difference on performance, particularly when there are bursting CPU bound loads (the most common type).
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