DTrace integration and quick start
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You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
Gvozdikov, Veniamin
This talk will explain how to use DTrace, where to use it, and how to quickly introduce DTrace in your applications. DTrace is a powerful framework for tracing applications on the fly. We will look at: * How DTrace works * Who DTrace uses * How to use DTrace * How to integrate it in your awesome applications
 If you want to write a script, you can see many different scripts in this document. In the first one, terminology. Detrays has a terminology provided in the model. Prop is a short code inside your code, and you will trace that. It's written in functions provided it's object, logical object which contains many different props. Model is name of application or kernel. It's a short CMO half-length work. In user space and kernel space, you do different kernel model, load it and the kernel. Different providers also load in the kernel work via lib.detrays.lib and also lib.rock. We are command-line tool detrays providers. It's available to providers on freebz. Many different platforms depend on providers because not ported yet on many different systems. Linux has two and freebzd and savaris and OSX has many different providers to trace drivers and others. Detrays. You can run mine one and see command-line from the end. It's a big program to compil and auto application which written a dual language. It's compil to byte code and load in kernel which collect information and output in your terminal. It's supported in many different platforms, but on OSX it's a bit patched. You need to run detrays to generate a byte code which added to binary section. Special which after run will load in the kernel. This is first running complication. Detrays.l. If you run, you will see many different providers which are available in your system. Also, you can run detrays.l and flag-n and detrays to see how are the providers and functions. It's like afg and start and begin. D language isn't D language as you usually use. It's D language detrays. It uses it as afg which has a provider, modular function and prop. So it predicts its statement like if in C and actions like C, written code, structures and another. It's supported in all. First the application. If you run detrays, C scale, open entry, you will see which application. Open it up file just now. You can see tick every one second. All data will copied from kernel space to user space. It's need to save many different things to change context between user space and kernel space memory. If you run TCP dump, you will see in top TCP dump has many different resource will be busy. Because it will copy from kernel to user space. You can write a profile with different tick and megahertz. Often you will want to see output. You will find variable. I read few interesting variable from detrays which included in language. You can see arcs with also prop. You can get name of function or provider, time stamp. If you use a time stamp, you will get a time stamp from starting and ending executing your code. If you use VTEM stamp, it will on CPU. It's only which data will work without time spent on use it with detrays code only for execute functions. Aggregate functions. You can write aggregate to see how many different ways count, scale, sum, average and quantilize your calls and to know the tracing applications. You can trace application via the provider. It's interesting thing to look at your application. If your application build without use, without modificate code with detrays, you can see what it does. It works on 3dsd via leaprock. You will see which functions were scaled. For example, if you use MySQL, you can see what request from client to MySQL and get information by connect. Without modification of code. If you have a web, you can download my code special code which I have written for presentation. You can see different internet existences. Can I start? Are you ready? This first program, if you see highlighted green, this is lines for this simply code for length of fast and slow functions to see how many long time it does. It's pretty simple code is that special for looks at code and find troubles. This is first provider via PID provider without modification code. You run a PID and then do a target. Target is number of processor PID and length and n3. You will see information from string if you will copy in this error. Argement 0 is first argument. You will get a timestamp and self.ts. Self is object for functions. You can write it to find different between times. This is next part. This is end of code and data will collected in array and count. Also we will can twice a code to see quantilies how many long. It depends by length of string to see output. One time per 10 seconds and then exit. It works 10 seconds and then show output from end is like AFK syntax. This is result. It was count 6 fast and 6 slow lines with 2 functions. This is distribution which can quantilize. You can see how long and how much lines was collected. It is very fast and very slow. You can find your providers in your code. You need to write a simple file in d-language. Then generate a header file and add the prop, start and stop. You can use it in different way. After run application generate some code which contain macros. They must start and then stop. Then we will run and include your code. You will see when the function started and when it cost execution. Complete applications defined by system. If you use free bsd, Raris, Linux, netbsd, qnx you will need run detrace to generate object. You will attach your byte code in section sonv in your binary. It will auto-inferno when you run application. It will auto-data before application execute main function in your code. Then it is subject in one binary. In first script if you download files you can see that. Detrace support it. There are many different options. So many options I will not talk about that. It is a short introduction. You will see if you run detrace and add name of application as m-m. You will get the provider and props. You can collect that without the provider. It will count in your kernel without different modification of code. Detrace demo is second demonstration. It is supported in cargoments. You can write string, int in 64, struc2s and any different kind of variables. You can see the documentation and also depend by system to see what you want. Then same steps to get working code. This is a bit modification. Highlight it red. It is smart function to very slow code for collecting data and see different between code because code so fast. This is a detrace code which started to start in timestamp and changed timestamp to zero and printed when started application. Also as preview collecting data and need to copy in strace special function for getting from kernel to user space data with lines and strings and then printed. Same as preview. Not different. As result by execution. You also can evolution your interface. If your interface unstable, you want to know many different admins or developers want to see which kind of version of code works. And how it works. And what stage and support. You write stability with special program options and you attach attributes. This is code also show it how to work with struc2s. This is struc2 to see what code does and this is first library in detrace. You need to move that library in your third dash live data trace and in detrace it will available to scripting. And this path. And after running you can translate your see functions arguments to detrace and show in code. And then you can get it from short code in detrace. That's all. Like it. It is on destructors. Results. Also if you application level more convenient you writing code and rabin.js and vero. You want to see what your code does. But libdtrace supported via libdts. Special external library and integrated that in no-skill database which uses lower scripts. And it's named at toronto. It's no-skill in memory like redis. What supported in different plugins and a bit popular in Russia. It also don't files but it's a few slides so you can fast build it. You can write your providers and start it after running code. And you can stop at runtime. You need modificate code. Only for functions inside database is a bit example. You wrote a function which show it also lines and which lines and their length. And reference more information. Big list presentation and any questions if you have. Okay. That's all. That's all. Test codes you can download from link. I can't because my environment was saved on my previous job. And that's the block after changing the job. But you can download and see with me it will work perfectly. Any questions? Okay. For freeBSD I recommend to use a detrace.kit to see what your applications does. It's pretty easy to understand and you can write short codes and see many different codes to see in PHP. My friends uses in PHP. I'm interesting to integrate in applications. I'm more developers and looking for code to administrate it. I know many different types of applications to generate code. I believe they have more uncomfortability. They're Hole. And they have enough in here to poop the code out. They don't need code for that in PHP. in the field too. f Listen.... Hmm… Yeah, also you can write in, in every instrument, attach this external props and see what will be in benefits. application do in future and collect data and see what you see in your code on your functions if you're interested in it. Who is next? Oh, I can't answer this question. I can't answer this question because who is written this way is his guy and many different freebies developers supporting KAKOT and added new features and when I did that presentation I found around 5 or 7 bugs in the kernel modus and it will fix it but it not fix it yet in 10. It fix it in 10 stable not in URDs. I know you can write Mark Johnson to more information. Is it so? Okay. Thank you. Thank you. Please take out your trash when you leave the room. The next talk will be at 1pm so in 35 minutes. We have 35 minutes now so I think you can manage to find somewhere where you can find the correct address for where you're not rép그렇-ικ, I'm sorry is that here don't feel difficulty guess I had well sorted Thank you. Do you have a question? I'm not sure. Is there a question that's not for those in the office or for those in the office that you know that you see it in the public? Not only in the public, but in the public. We're going to have a big call to call. We're going to have a big call to call. A big call, and a big loudomi forcing this person even to act dirty. But we're going to get some back up as soon as a private person colocar Guy is called Marco. So, let's welcome Andy�리. What can we appreciate this 차지 that Do you want to put up a public comment? Some comments applied at the moment? Out. Do you want to go to the U.S. or the United States? Out. The U.S. The U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and U.S. the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. and the U.S. governor ничего So, this is V6 and we do that across them. Okay, so if you look in the system preferences, you see this, you have V6 addresses, so they're goingiors, so you use the band assez so that a OFF I cannot make a synonymic but that don't need try damn były have the coffee or something with that so be a member. So you can do, um, it's a pretty good way to do it. So, that should be it. Okay. Thanks. Thank you. Thanks. Thank you. Thanks. Thanks. Thanks. Thank you. Thank you. Thanks.
 If you want to write a script, you can see many different scripts in this document.  In the first one, terminology.  Detrays has a terminology provided in the model.  Prop is a short code inside your code, and you will trace that.  It's written in functions provided it's object, logical object which contains many different props.  Model is name of application or kernel.  It's a short CMO half-length work.  In user space and kernel space, you do different kernel model, load it and the kernel.  Different providers also load in the kernel work via lib.detrays.lib and also lib.rock.  We are command-line tool detrays providers.  It's available to providers on freebz.  Many different platforms depend on providers because not ported yet on many different systems.  Linux has two and freebzd and savaris and OSX has many different providers to trace drivers and others.  Detrays.  You can run mine one and see command-line from the end.  It's a big program to compil and auto application which written a dual language.  It's compil to byte code and load in kernel which collect information and output in your terminal.  It's supported in many different platforms, but on OSX it's a bit patched.  You need to run detrays to generate a byte code which added to binary section.  Special which after run will load in the kernel.  This is first running complication.  Detrays.l.  If you run, you will see many different providers which are available in your system.  Also, you can run detrays.l and flag-n and detrays to see how are the providers and functions.  It's like afg and start and begin.  D language isn't D language as you usually use.  It's D language detrays.  It uses it as afg which has a provider, modular function and prop.  So it predicts its statement like if in C and actions like C, written code, structures and another.  It's supported in all.  First the application.  If you run detrays, C scale, open entry, you will see which application.  Open it up file just now.  You can see tick every one second.  All data will copied from kernel space to user space.  It's need to save many different things to change context between user space and kernel space memory.  If you run TCP dump, you will see in top TCP dump has many different resource will be busy.  Because it will copy from kernel to user space.  You can write a profile with different tick and megahertz.  Often you will want to see output.  You will find variable.  I read few interesting variable from detrays which included in language.  You can see arcs with also prop.  You can get name of function or provider, time stamp.  If you use a time stamp, you will get a time stamp from starting and ending executing your code.  If you use VTEM stamp, it will on CPU.  It's only which data will work without time spent on use it with detrays code only for execute functions.  Aggregate functions.  You can write aggregate to see how many different ways count, scale, sum, average and quantilize your calls  and to know the tracing applications.  You can trace application via the provider.  It's interesting thing to look at your application.  If your application build without use, without modificate code with detrays, you can see what it does.  It works on 3dsd via leaprock.  You will see which functions were scaled.  For example, if you use MySQL, you can see what request from client to MySQL and get information by connect.  Without modification of code.  If you have a web, you can download my code special code which I have written for presentation.  You can see different internet existences.  Can I start?  Are you ready?  This first program, if you see highlighted green, this is lines for this simply code for length of fast and slow functions  to see how many long time it does.  It's pretty simple code is that special for looks at code and find troubles.  This is first provider via PID provider without modification code.  You run a PID and then do a target.  Target is number of processor PID and length and n3.  You will see information from string if you will copy in this error.  Argement 0 is first argument.  You will get a timestamp and self.ts.  Self is object for functions.  You can write it to find different between times.  This is next part.  This is end of code and data will collected in array and count.  Also we will can twice a code to see quantilies how many long.  It depends by length of string to see output.  One time per 10 seconds and then exit.  It works 10 seconds and then show output from end is like AFK syntax.  This is result.  It was count 6 fast and 6 slow lines with 2 functions.  This is distribution which can quantilize.  You can see how long and how much lines was collected.  It is very fast and very slow.  You can find your providers in your code.  You need to write a simple file in d-language.  Then generate a header file and add the prop, start and stop.  You can use it in different way.  After run application generate some code which contain macros.  They must start and then stop.  Then we will run and include your code.  You will see when the function started and when it cost execution.  Complete applications defined by system.  If you use free bsd, Raris, Linux, netbsd, qnx you will need run detrace to generate object.  You will attach your byte code in section sonv in your binary.  It will auto-inferno when you run application.  It will auto-data before application execute main function in your code.  Then it is subject in one binary.  In first script if you download files you can see that.  Detrace support it.  There are many different options.  So many options I will not talk about that.  It is a short introduction.  You will see if you run detrace and add name of application as m-m.  You will get the provider and props.  You can collect that without the provider.  It will count in your kernel without different modification of code.  Detrace demo is second demonstration.  It is supported in cargoments.  You can write string, int in 64, struc2s and any different kind of variables.  You can see the documentation and also depend by system to see what you want.  Then same steps to get working code.  This is a bit modification.  Highlight it red.  It is smart function to very slow code for collecting data and see different between code because code so fast.  This is a detrace code which started to start in timestamp and changed timestamp to zero and printed when started application.  Also as preview collecting data and need to copy in strace special function for getting from kernel to user space data with lines and strings and then printed.  Same as preview.  Not different.  As result by execution.  You also can evolution your interface.  If your interface unstable, you want to know many different admins or developers want to see which kind of version of code works.  And how it works.  And what stage and support.  You write stability with special program options and you attach attributes.  This is code also show it how to work with struc2s.  This is struc2 to see what code does and this is first library in detrace.  You need to move that library in your third dash live data trace and in detrace it will available to scripting.  And this path.  And after running you can translate your see functions arguments to detrace and show in code.  And then you can get it from short code in detrace.  That's all.  Like it.  It is on destructors.  Results.  Also if you application level more convenient you writing code and rabin.js and vero.  You want to see what your code does.  But libdtrace supported via libdts.  Special external library and integrated that in no-skill database which uses lower scripts.  And it's named at toronto.  It's no-skill in memory like redis.  What supported in different plugins and a bit popular in Russia.  It also don't files but it's a few slides so you can fast build it.  You can write your providers and start it after running code.  And you can stop at runtime.  You need modificate code.  Only for functions inside database is a bit example.  You wrote a function which show it also lines and which lines and their length.  And reference more information.  Big list presentation and any questions if you have.  Okay.  That's all.  That's all.  Test codes you can download from link.  I can't because my environment was saved on my previous job.  And that's the block after changing the job.  But you can download and see with me it will work perfectly.  Any questions?  Okay.  For freeBSD I recommend to use a detrace.kit to see what your applications does.  It's pretty easy to understand and you can write short codes and see many different codes to see in PHP.  My friends uses in PHP.  I'm interesting to integrate in applications.  I'm more developers and looking for code to administrate it.  I know many different types of applications to generate code.  I believe they have more uncomfortability.  They're Hole.  And they have enough in here to poop the code out.  They don't need code for that in PHP.  in the field too.  f Listen. ...  Hmm…  Yeah, also you can write in, in every instrument, attach this external props and see  what will be in benefits.  application do in future and collect data and see what you see in your code on your  functions if you're interested in it.  Who is next?  Oh, I can't answer this question.  I can't answer this question because who is written this way is his guy and many different  freebies developers supporting KAKOT and added new features and when I did that presentation  I found around 5 or 7 bugs in the kernel modus and it will fix it but it not fix it yet in  10.  It fix it in 10 stable not in URDs.  I know you can write Mark Johnson to more information.  Is it so?  Okay.  Thank you.  Thank you.  Please take out your trash when you leave the room.  The next talk will be at 1pm so in 35 minutes.  We have 35 minutes now so I think you can manage to find somewhere where you can find  the correct address for where you're not rép 그렇- ικ, I'm sorry is that here don't feel difficulty guess I had well sorted  Thank you.  Do you have a question?  I'm not sure.  Is there a question that's not  for those in the office  or for those in the office  that you know  that you see it  in the public?  Not only in the public,  but in the public.  We're going to have a big  call to call.  We're going to have a big  call to call.  A big call,  and a big loudomi forcing  this person even to  act dirty.  But we're going to get  some back up as soon  as a private person  colocar Guy  is called Marco.  So, let's welcome  Andy�리.  What can we appreciate  this 차지  that  Do you want to put up a public comment?  Some comments applied at the moment?  Out.  Do you want to go to the U.S. or the United States?  Out.  The U.S.  The U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and U.S.  the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  and the U.S.  governor  ничего  So, this is V6 and we do that across them.  Okay, so if you look in the system preferences, you see this, you have V6 addresses, so they're  goingiors, so you use the band assez so that a OFF I cannot make a synonymic but that don't  need try damn były have the coffee or something with that so be a member.  So you can do, um,  it's a pretty good way to do it.  So, that should be it.  Okay.  Thanks.  Thank you.  Thanks.  Thank you.  Thanks.  Thanks.  Thanks.  Thank you.  Thank you.  Thanks.
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