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Fast boot

專利號
US11175927B2
公開日期
2021-11-16
申請人
TidalScale, Inc.（US CA Los Gatos）
發(fā)明人
David P. Reed; Isaac R. Nassi; Pete Jarvis
IPC分類
G06F9/44; G06F9/4401; G06F9/455; G06F9/48; G06F12/0815; H04L29/08; G06F12/1009
技術(shù)領(lǐng)域
page,node,dormant,tidalpod,memory,in,guest,nam,hyper,node_0
地域： CA CA Campbell

摘要

Initializing a computing system using dormant pages includes marking a set of guest physical addresses as dormant. It further includes, for each node in a plurality of physical nodes, designating a set of real physical addresses for zeroing. An operating system is executing collectively across the physical nodes.

說明書

FIG. 20 is a flow diagram illustrating an embodiment of a process for initializing a system using dormant pages. In some embodiments, process 2000 is executed by a distributed hyper-kernel (e.g., at system initialization time). The process begins at 2002 when a set of guest physical addresses is marked as dormant. At 2004, a set of real physical addresses is designated to be zeroed. The real physical addresses are zeroed on an ongoing basis.

Converting Dormant Pages

Suppose that a software defined server has been initialized and booted up, as described above, and is now operating in steady state. There are guest physical addresses in the system that are marked as dormant that have not yet been mapped to any page of real physical memory.

In some embodiments, dormant pages/guest physical addresses are converted (mapped to real physical pages of memory) on an on-demand basis. Suppose that a VCPU accesses a guest physical address that the VCPU believes to be full of zeroes, but is actually dormant. The dormant guest physical address will need to be mapped to an actual page of physical memory. Described below are details regarding converting or materializing dormant pages.

FIG. 21 illustrates an embodiment of converting a dormant page. In this example, suppose that a thread running in a VCPU implemented on a physical CPU on node_0 (2102) requests to write a set of non-zero values (e.g., a set of 1s) into a guest physical address 6 (GPA 6 (2104) in node_0's page table).

權(quán)利要求

1
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