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affef66b65
This patch relaxes the implementation while satisfying the memory ordering
requirements for atomic operations, which will help improve performance on
LA664+.
Unixbench with full threads (8)
before after
Dhrystone 2 using register variables 203910714.2 203909539.8 0.00%
Double-Precision Whetstone 37930.9 37931 0.00%
Execl Throughput 29431.5 29545.8 0.39%
File Copy 1024 bufsize 2000 maxblocks 6645759.5 6676320 0.46%
File Copy 256 bufsize 500 maxblocks 2138772.4 2144182.4 0.25%
File Copy 4096 bufsize 8000 maxblocks 11640698.4 11602703 -0.33%
Pipe Throughput 8849077.7 8917009.4 0.77%
Pipe-based Context Switching 1255108.5 1287277.3 2.56%
Process Creation 50825.9 50442.1 -0.76%
Shell Scripts (1 concurrent) 25795.8 25942.3 0.57%
Shell Scripts (8 concurrent) 3812.6 3835.2 0.59%
System Call Overhead 9248212.6 9353348.6 1.14%
=======
System Benchmarks Index Score 8076.6 8114.4 0.47%
Signed-off-by: WANG Rui <wangrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.