Document:add Chinese translation of basic_profiling.txt
This is a Chinese translated version of Documentation/basic_profiling.txt Signed-off-by: Liang Xie <xieliang007@gmail.com> Acked-by: Harry Wei <harryxiyou@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Documentation/zh_CN/basic_profiling.txt
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Documentation/zh_CN/basic_profiling.txt
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Chinese translated version of Documentation/basic_profiling
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If you have any comment or update to the content, please post to LKML directly.
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However, if you have problem communicating in English you can also ask the
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Chinese maintainer for help. Contact the Chinese maintainer, if this
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translation is outdated or there is problem with translation.
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Chinese maintainer: Liang Xie <xieliang@xiaomi.com>
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---------------------------------------------------------------------
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Documentation/basic_profiling的中文翻译
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如果想评论或更新本文的内容,请直接发信到LKML。如果你使用英文交流有困难的话,也可
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以向中文版维护者求助。如果本翻译更新不及时或者翻译存在问题,请联系中文版维护者。
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中文版维护者: 谢良 Liang Xie <xieliang007@gmail.com>
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中文版翻译者: 谢良 Liang Xie <xieliang007@gmail.com>
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中文版校译者:
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以下为正文
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---------------------------------------------------------------------
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下面这些说明指令都是非常基础的,如果你想进一步了解请阅读相关专业文档:)
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请不要再在本文档增加新的内容,但可以修复文档中的错误:)(mbligh@aracnet.com)
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感谢John Levon,Dave Hansen等在撰写时的帮助
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<test> 用于表示要测量的目标
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请先确保您已经有正确的System.map / vmlinux配置!
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对于linux系统来说,配置vmlinuz最容易的方法可能就是使用“make install”,然后修改
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/sbin/installkernel将vmlinux拷贝到/boot目录,而System.map通常是默认安装好的
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Readprofile
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-----------
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2.6系列内核需要版本相对较新的readprofile,比如util-linux 2.12a中包含的,可以从:
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http://www.kernel.org/pub/linux/utils/util-linux/ 下载
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大部分linux发行版已经包含了.
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启用readprofile需要在kernel启动命令行增加”profile=2“
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clear readprofile -r
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<test>
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dump output readprofile -m /boot/System.map > captured_profile
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Oprofile
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--------
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从http://oprofile.sourceforge.net/获取源代码(请参考Changes以获取匹配的版本)
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在kernel启动命令行增加“idle=poll”
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配置CONFIG_PROFILING=y和CONFIG_OPROFILE=y然后重启进入新kernel
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./configure --with-kernel-support
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make install
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想得到好的测量结果,请确保启用了本地APIC特性。如果opreport显示有0Hz CPU,
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说明APIC特性没有开启。另外注意idle=poll选项可能有损性能。
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One time setup:
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opcontrol --setup --vmlinux=/boot/vmlinux
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clear opcontrol --reset
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start opcontrol --start
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<test>
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stop opcontrol --stop
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dump output opreport > output_file
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如果只看kernel相关的报告结果,请运行命令 opreport -l /boot/vmlinux > output_file
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通过reset选项可以清理过期统计数据,相当于重启的效果。
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