The Memory Manager in Windows Server 2003 and Win…….ppt

(c) 2005 Microsoft Corporation The Memory Manager in Windows? Server 2003 and Windows Vista? Landy Wang Software Design Engineer Windows Kernel Team Microsoft Corporation Outline Memory Manager (MM) improvements in Windows Server 2003 SP1 64-bit Windows features and Enhancements NUMA and large page support added Performance Enhancements Support for No Execute (NX) Capability Outline (con’t) Memory Manager Improvements Planned for Windows Vista Dynamic system address space Kernel page table pages allocated on demand Support for very large registries NUMA and large page support enhancements Advanced video model support I/O and Section Access Improvements Performance Improvements Terminal Server improvements Robustness and Diagnosability Improvements Server 2003 SP1 – Windows 64 Windows 64-bit memory 8TB user address space 8TB kernel address space 128GB pools 128GB system page table entries (PTEs) 1TB system cache Support for x64 platform added 4GB virtual address space added for 32-bit large address space aware applications Further increases performance of WOW layer on both Itanium and x64 systems Server 2003 SP1 – NUMA Large Page Support Large page support added for user images and pagefile-backed sections Large pages now also used in 32-bit, even when booted with /3GB switch, for Kernel Page Frame Number (PFN) database Initial nond pool Prior large page support (added in Server 2003) was for the following User private memory Device driver image mappings Kernel, when not booted with /3GB switch Server 2003 SP1 – NUMA Large Page Support Pages zeroed in parallel and in a node aware fashion during boot up Reduces boot time on large NUMA systems Physical pages initially consumed in top-down order, instead of bottom-up Keeps more pages below 4GB available for drivers that require it Server 2003 SP1 – Performance Enhancements Working set management performance increases, especially in Areas of large shared memory and when booted with /3GB switch Premature self-tr