Methods to Improve Bootup Time in Linux


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Source: Sony
Date: January 2008
Type: White Paper
Rating: (0)

Overview: This white paper focuses on techniques for reducing the bootup time up until the start of user space. That is, techniques are described which reduce the firmware time, and the kernel start time. This paper presents several techniques for reducing the bootup time of the Linux kernel, including Execute-In-Place (XIP), avoidance of calibrate delay, and reduced probing by certain drivers and subsystems. Using a variety of techniques, the Linux kernel can be booted on embedded hardware in under 500 milliseconds. Current efforts and future directions of work to improve bootup time are described.

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