Method and apparatus for starting application program

Abstract

The invention discloses a method and an apparatus for starting an application program, belonging to the field of computers. The method comprises: loading pre-fetching data corresponding to the application program when receiving an application program starting instruction, wherein the pre-fetching data includes file blocks corresponding to page faults occurred in historical starting process of the application program; and loading code of the application program so as to start the application program. The apparatus comprises a load module of the pre-fetching data and a load module of the code. According to the invention, an application program is started by first loading file blocks corresponding to page faults occurred in historical starting process of the application program and then loading code of the application program, which reduces the number of occurrence times of page faults in starting process of the application program greatly, decreases phenomenon of frequent exchanges of memory pages and files in loading process of the program, and improves starting speed and efficiency of the application program.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method and device for starting an application program. Background technique [0002] With the rapid development of computer technology, users will install various applications. The disk I / O during the application startup process is basically introduced by Page Fault. When the virtual address of the process is not in the working set (Working Set) of the process, Page Fault will occur. The order of Page Fault is generally like this: some pages are read from a certain part of a file, and then some pages may be read from a distance from the same file. Read some pages from another part farther away, then read some pages from a different file, possibly read pages from a directory, and then read some pages from the first file, read The file is discontinuous, and the reading position may also be discontinuous. This jumpy reading greatly slows down the speed of starting the application every t...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of computer technology, users will install various applications. The disk I / O during the application startup process is basically introduced by Page Fault. When the virtual address of the process is not in the working set (Working Set) of the process, Page Fault will occur. The order of Page Fault is generally like this: some pages are read from a certain part of a file, and then some pages may be read from a distance from the same file. Read some pages from another part farther away, then read some pages from a different file, possibly read pages from a directory, and then read some pages from the first file, read The file is discontinuous, and the reading position may also be discontinuous. This jumpy reading greatly slows down the speed of starting the application every time. If the corresponding content is not in the physical memory, it needs to be read from the file and trigger Hard Fault, one of the main reasons for the long cold start time of the application is that there are too many Hard Faults

The Hard Fault is read on demand (16KB or 32KB at a time), and considering other I / O of the system, it may cause the I / O offset to jump on the disk, thus greatly slowing down the speed of each access. The speed reduces the startup efficiency of the application, and the startup speed is one of the most important performance indicators of the application, which directly affects the user's impression of the application experience

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