http://googya.github.io/blog/categories/dtrace/

最近看了点关于Dtrace的东西,它是个通用型的工具,但我主要集中于分析ruby程序的执行上面。关于操作系统的性能分析,比如cpu、内存、io、文件系统等,使用起来貌似挺复杂,木有细看。

这里简单的输出一条命令:

sudo dtrace -n 'ruby$target:::object-create {@objects[copyinstr(arg0)]=count();}' -c 'ruby -e "puts :hello"'

输出的结果是:

    dtrace: description 'ruby$target:::object-create ' matched 1 probe
-e:1: unterminated string meets end of file
dtrace: pid 15203 has exited #<Class:0x007fabf38e0700> 1
ARGF.class 1
IOError 1
Mutex 1
NoMemoryError 1
SyntaxError 1
SystemStackError 1
ThreadGroup 1
Time 1
LoadError 2
Object 2
Gem::Specification 8
Gem::Version 10
Hash 11
Gem::Requirement 23
Array 96
String 260

ruby2.0已经有支持probe了,所以可以使用dtrace

2.0之前的如果要使用dtrace的话,要使用 ruby-dtrace这个gem

另外在学习的时候,写了dtrace的脚本,其实就是D语言了, rb_flowinfo.d,查看ruby方法的调用过程:

    #!/usr/sbin/dtrace -Zs
#pragma D option quiet
#pragma D option switchrate=10 self int depth; dtrace:::BEGIN
{
printf("%s %6s %10s %16s:%-4s %-8s -- %s\n", "C", "PID", "DELTA(us)", "FILE", "LINE", "TYPE", "NAME");
} ruby*:::method-entry,
ruby*:::method-return
/self->last == 0/
{
self->last = timestamp;
} ruby*:::method-entry
/copyinstr(arg0) == "Object"/
{
this->delta = (timestamp - self->last) / 1000;
this->name = strjoin(strjoin(copyinstr(arg0), "::"), copyinstr(arg1));
printf("%d %6d %10d %16s:%-4d %-8s %*s-> %s\n", cpu, pid, this->delta,
basename(copyinstr(arg2)), arg3, "method", self->depth * 2, "", this->name); self->depth++;
self->last = timestamp;
} ruby*:::method-return
/copyinstr(arg0) == "Object"/
{
this->delta = (timestamp - self->last) / 1000;
self->depth -= self->depth > 0 ? 1 : 0;
this->name = strjoin(strjoin(copyinstr(arg0), "::"), copyinstr(arg1));
printf("%d %6d %10d %16s:%-4d %-8s %*s<- %s\n", cpu, pid, this->delta,
basename(copyinstr(arg2)), arg3, "method", self->depth * 2, "", this->name);
self->last = timestamp;
}

用于测试的ruby脚本, trace_method_call.rb

    dtrace_ruby $ cat trace_method_call.rb
#!/Users/wenleslie/.rvm/rubies/ruby-2.0.0-p0/bin/ruby
def func_c
puts "Function C"
sleep 1
end def func_b
puts "Function B"
sleep 6
func_c
end def func_a
puts "Function A"
func_b
end func_a

执行:

    sudo ./rb_flowinfo.d -c ./trace_method_call.rb

结果如下:

C    PID  DELTA(us)             FILE:LINE TYPE     -- NAME
Function A
Function B
4 15702 35986 trace_method_call.rb:13 method -> Object::func_a
4 15702 55 trace_method_call.rb:7 method -> Object::func_b
Function C0 15702 6001065 trace_method_call.rb:2 method -> Object::func_c 6 15702 1000922 trace_method_call.rb:5 method <- Object::func_c
6 15702 27 trace_method_call.rb:11 method <- Object::func_b
6 15702 19 trace_method_call.rb:16 method <- Object::func_a
^C

我的evernote上关于dtrace笔记有稍微详细一点的内容,有兴趣的话,可以看看

How to Use Dtrace Tracing Ruby Executing的更多相关文章

  1. dtrace 语法

    Usage: dtrace [-aACeFHlqSvVwZ] [-arch i386|x86_64] [-b bufsz] [-c cmd] [-D name[=def]]      [-I path ...

  2. Linux Perf Probes for Oracle Tracing

    Luca Canali on 21 Jan 2016 Topic: this post is about Linux perf and uprobes for tracing and profilin ...

  3. Adding DTrace Probes to PHP Extensions

      By cj on Dec 06, 2012 The powerful DTrace tracing facility has some PHP-specific probes that can b ...

  4. [转]Top 10 DTrace scripts for Mac OS X

    org link: http://dtrace.org/blogs/brendan/2011/10/10/top-10-dtrace-scripts-for-mac-os-x/ Top 10 DTra ...

  5. End-to-End Tracing of Ajax/Java Applications Using DTrace

    End-to-End Tracing of Ajax/Java Applications Using DTrace         By Amit Hurvitz, July 2007     Aja ...

  6. Tracing mysqld Using DTrace

    http://dev.mysql.com/doc/refman/5.6/en/dba-dtrace-server.html MySQL 5.6 Reference Manual -> 5 MyS ...

  7. Using Dtrace OEL 6.X and Oracle® Solaris 11.3 DTrace (Dynamic Tracing) Guide

    http://www.hhutzler.de/blog/using-dtrace/ https://docs.oracle.com/cd/E53394_01/html/E53395/gkyaz.htm ...

  8. [转]Breaking Bad With DTrace

    Source:http://initwithfunk.com/blog/2013/05/31/breaking-bad-with-dtrace/ I’ve spent an unwise amount ...

  9. Life of an Oracle I/O: tracing logical and physical I/O with systemtap

    https://db-blog.web.cern.ch/blog/luca-canali/2014-12-life-oracle-io-tracing-logical-and-physical-io- ...

随机推荐

  1. 制作iso文件

     genisoimage -o fusionstor-yi-2017-03-08.iso(镜像名称) -v -cache-inodes -joliet-long -R -J -T -V ZS  -c  ...

  2. 解读Loadrunner网页细分图(Web Page Diagnostics)

    [转载的地址]https://www.cnblogs.com/littlecat15/p/9456376.html 一.启用网页细分图 首先在Controller场景设计运行之前,需要在菜单栏中设置D ...

  3. python 学习分享-购物车实操篇

    程序要求如下: '''购物车程序: 启动程序后,输入用户名密码后,如果是第一次登录,让用户输入工资,然后打印商品列表 允许用户根据商品编号购买商品 用户选择商品后,检测余额是否够,够就直接扣款,不够就 ...

  4. 101 Hack 50

    101 Hack 50 闲来无事.也静不下心,打个代码压压压惊 Hard Questions by kevinsogo Vincent and Catherine are classmates who ...

  5. 紫书第一章训练1 D -Message Decoding

    Some message encoding schemes require that an encoded message be sent in two parts. The first part, c ...

  6. String、StringBuffer和StringBuilder,定义一个自己的StringBuilder的类

    String Java中的字符串值属于String类,虽然有其它方法表示字符串(如字符数组),但Java一般使用String类作为字符串的标准格式,Java编译器把字符串值作为String对象; St ...

  7. PTA 10-排序6 Sort with Swap(0, i) (25分)

    题目地址 https://pta.patest.cn/pta/test/16/exam/4/question/678 5-16 Sort with Swap(0, i)   (25分) Given a ...

  8. android 脱壳 之 dvmDexFileOpenPartial断点脱壳原理分析

    android 脱壳 之 dvmDexFileOpenPartial断点脱壳原理分析 导语: 笔者主要研究方向是网络通信协议的加密解密, 对应用程序加固脱壳技术很少研究, 脱壳壳经历更是经历少之甚少. ...

  9. 【CCF】最优灌溉 最小生成树

    [AC] #include<iostream> #include<cstdio> #include<string> #include<cstring> ...

  10. cf359D Pair of Numbers

    Simon has an array a1, a2, ..., an, consisting of n positive integers. Today Simon asked you to find ...