Invention Grant
- Patent Title: Identification of low-activity large memory pages
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Application No.: US14302069Application Date: 2014-06-11
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Publication No.: US09501422B2Publication Date: 2016-11-22
- Inventor: Yury Baskakov , Peng Gao , Joyce Kay Spencer
- Applicant: VMware, Inc.
- Applicant Address: US CA Palo Alto
- Assignee: VMware, Inc.
- Current Assignee: VMware, Inc.
- Current Assignee Address: US CA Palo Alto
- Main IPC: G06F12/08
- IPC: G06F12/08 ; G06F12/10 ; G06F12/12 ; G06F9/50 ; G06F9/455

Abstract:
Large pages that may impede memory performance in computer systems are identified. In operation, mappings to selected large pages are temporarily demoted to mappings to small pages and accesses to these small pages are then tracked. For each selected large page, an activity level is determined based on the tracked accesses to the small pages included in the large page. By strategically selecting relatively low activity large pages for decomposition into small pages and subsequent memory reclamation while restoring the mappings to relatively high activity large pages, memory consumption is improved, while limiting performance impact attributable to using small pages.
Public/Granted literature
- US20150363326A1 IDENTIFICATION OF LOW-ACTIVITY LARGE MEMORY PAGES Public/Granted day:2015-12-17
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