Bug 12183 - Enhanced Hygon processor's processing capabilities for large memory copying
Summary: Enhanced Hygon processor's processing capabilities for large memory copying
Status: NEW
Alias: None
Product: ANCK 6.6 Dev
Classification: ANCK
Component: X86 (show other bugs) X86
Version: 6.6.y-3
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: Guanjun
QA Contact: shuming
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2024-12-02 10:45 UTC by qiuzhiteng
Modified: 2024-12-13 14:06 UTC (History)
3 users (show)

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Description qiuzhiteng hygon_group 2024-12-02 10:45:09 UTC 
Description of problem:


Version-Release number of selected component (if applicable):
Hygon processor has performance bottleneck when copying big data between kernel mode and user mode

How reproducible:


Steps to Reproduce:
1.Use i387 extended instructions + prefetcha instructions + NT instructions to optimize the copy function
2.Save i387 registers when switching processes
3.Because the context can be saved, it is designed to be a non-atomic copy.

Actual results:


Expected results:


Additional info:
Comment 1 小龙 admin 2024-12-03 12:26:45 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/4185
Comment 2 小龙 admin 2024-12-13 14:06:48 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/4223