Skip to main content

Generating Java Mixed Mode Flame Graphs

Overview

I've seen Brendan Gregg's talk on generating mixed-mode flame graphs and I wanted to reproduce those flamegraphs for myself. Setting up the tools is a little bit of work, so I wanted to capture those steps. Check out the Java in Flames post on the Netflix blog for more information.

I've created github repo (github.com/jerometerry/perf)  that contains the scripts used to get this going, including a Vagrantfile, and JMeter Test Plan.

Here's a flame graph I generated while applying load (via JMeter) to the basic arithmetic Tomcat sample application. All the green stacks are Java code, red stacks are kernel code, and yellow stacks are C++ code. The big green pile on the right is all the Tomcat Java code that's being run.


Tools

Here's the technologies I used (I'm writing this on a Mac).
  • VirtualBox 5.1.12
  • Vagrant 1.9.1
  • bento/ubuntu-16.04 (kernel 4.4.0-38)
  • Tomcat 7.0.68
  • JMeter 3.1
  • OpenJDK 8 1.8.111
  • linux-tools-4.4.0-38
  • linux-tools-common
  • Brendan Gregg's FlameGraph tools
  • Johannes Rudolph's Perf Map Agent tool 

Steps

Here's the steps to set up the VM
  1. Created a Ubuntu 16.04VM using VirtualBox / Vagrant (vagrant init bento/ubuntu-16.04; vagrant up)
  2. SSH into the VM (vagrant ssh)
  3. Update apt (sudo apt-get update)
  4. Install Java 8 JDK (sudo apt-get install openjdk-8-jdk)
  5. Install Java 8 Debug Symbols (sudo apt-get install openjdk-8-dbg)
  6.  Install Tomcat 7 (sudo apt-get install tomcat7 tomcat7-examples)
  7. Configure JAVA_HOME in /etc/default/tomcat7 (JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64)
  8. Configure JAVA_OPTS in /etc/default/tomct7 (JAVA_OPTS="-Djava.awt.headless=true -Xmx1024m -XX:+UseG1GC -XX:+PreserveFramePointer -XX:+UnlockDiagnosticVMOptions -XX:+DebugNonSafepoints")
  9. Restart tomcat7 service (sudo service tomcat7 restart)
  10. Install cmake (sudo apt-get install cmake build-essential)
  11. Install Linux perf (sudo apt-get install linux-tools-common linux-tools-generic linux-tools-`uname -r`)
  12. Download flamegraph (git clone --depth=1 https://github.com/brendangregg/FlameGraph)
  13. Download perf-map-agent (git clone --depth=1 https://github.com/jrudolph/perf-map-agent)
  14. Build perf-map-agent (cd perf-map-agent; export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64; cmake .; make)

At this point, Tomcat 7, Java 8, Linux Perf, FlameGraphs, and Perf Map Agent are all configured, and we're just about ready to generate a flame graph.

Applying Workload

Next step is to apply load to the Tomcat. From the host
  1. Download JMetere 3.1
  2. Run JMeter
  3. Add a Thread Group: Number of Threads (users): 25, Ramp up period (in seconds): 30, Loop Count: Forever
  4. Add new Sampler, HTTP Listener. Server Name or IP: localhost. Port Number: 8080. Path: /examples/jsp/jsp2/el/basic-arithmetic.jsp
  5. Hit play
That is a basic test plan to drive the Tomcat basic arithmetic sample using 25 users ramped up over 30 seconds, forever. That's enough load to capture a decent profile. You might need to tweak JMeter HTTP Listener, depending on how your VM is set up. In my case, I have the VM port forwarding guest port 8080 to host port 8080. 

Generating Flamegraph

With the VM configured and JMeter running, we can now generate a flame graph. From the home directory (~/) in the VM
  1. sudo perf record -F 99 -a -g -- sleep 30
  2. sudo ./FlameGraph/jmaps
  3. sudo chown root /tmp/perf-*.map
  4. sudo chown root perf.data
  5. sudo perf script | ./FlameGraph/stackcollapse-perf.pl | grep -v cpu_idle | ./FlameGraph/flamegraph.pl --color=java --hash > flamegraph.svg
And with that, the Flame Graph is now generated!

You can copy the flame graph to the host as follows
  • cp ~/flamegraph.svg /vagrant
This is put the flamegraph.svg file in the directory you ran the vagrant up command in, since by default vagrant syncs that folder.

Automation

To simplify this, I've added the Vagrantfile to my github repo, along with the JMeter Test plan.

git clone https://github.com/jerometerry/perf.git
cd ./perf
vagrant up

... Start JMeter test plan

vagrant ssh
sudo ~/generate-flamegraph.sh
exit


AWS EC2

The steps above are pretty close to what you would do to set this up in AWS EC2. Assuming you have an EC2 Ubuntu instance running with OpenJDK 8 installed, you would need to

  1. SSH into the EC2 instance
  2. Update apt (sudo apt-get update)
  3. Install Java 8 Debug Symbols (sudo apt-get install openjdk-8-dbg)
  4. Add PreserveFramePointer to JAVA_OPTS "XX:+PreserveFramePointer"
  5. Restart Java process
  6. Install cmake (sudo apt-get install cmake build-essential)
  7. Install Linux perf (sudo apt-get install linux-tools-common linux-tools-generic linux-tools-`uname -r`)
  8. Download flamegraph (git clone --depth=1 https://github.com/brendangregg/FlameGraph)
  9. Download perf-map-agent (git clone --depth=1 https://github.com/jrudolph/perf-map-agent)
  10. Build perf-map-agent (cd perf-map-agent; export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64; cmake .; make)
Once you have Linux Tools installed, the Java debug symbols installed, flamegraph and java-perf-agent configured, you can apply the workload to the Java process, then generate a flamegraph 

  1. sudo perf record -F 99 -a -g -- sleep 30
  2. sudo ./FlameGraph/jmaps
  3. sudo chown root /tmp/perf-*.map
  4. sudo chown root perf.data
  5. sudo perf script | ./FlameGraph/stackcollapse-perf.pl | ./FlameGraph/flamegraph.pl --color=java --hash > flamegraph.svg
Then you would scp the flamegraph.svg file down to your local machine. For example, assuming my username on the EC2 instance is jerome_terry, and I have an SSH tunnel configured named EC2Instance, then I would just run
  • scp jerome_terry@EC2Instance:/home/jerome_terry/flamegraph.svg ./

Safepoints


Nitsan Wakart recommended that I include the JVM options -XX:+UnlockDiagnosticVMOptions and -XX:+DebugNonSafepoints, and pass unfoldall to perfmap agent. Doing this paints a better picture of what's actually running on CPU.

Adding the JVM options is trivial (add it to JAVA_OPTS in the Tomcat example). Passing unfoldall to perfmap agent requires modification of Brendan Greggs jmaps script by changing


net.virtualvoid.perf.AttachOnce $pid 

to

net.virtualvoid.perf.AttachOnce $pid unfoldall

You'll also need to pass the ---inline flag to the stackcollapse-perf.pl script. 

References

Comments

  1. Those guidelines additionally worked to become a good way to recognize that other people online have the identical fervor like mine to grasp great deal more around this condition.

    Best AWS training in bangalore

    ReplyDelete
  2. Awesome , Your guidelines and approaches content was very nice, it seems to clearly understandable. Its unique one i was fully enjoyed, Thanks for giving this wonderful opportunity,

    Selenium Training in chennai | Selenium Course in Chennai

    ReplyDelete
  3. Excellent knowledge shared about java mixed mode frame , Thanks to you. For more details Click Here- : Digital Marketing Course

    ReplyDelete
  4. Visit for AWS training in Bangalore: AWS training in Bangalore

    ReplyDelete
  5. You have a good point here!I totally agree with what you have said!!Thanks for sharing your views...hope more people will read this article!!!
    tree stump removal lake worth

    ReplyDelete
  6. I think this is one of the most significant information for me. And i’m glad reading your article. dumpster rental asheville

    ReplyDelete
  7. Excellent Post! For more information Visit Here.
    septic tank pumping asheville

    ReplyDelete
  8. This is a great article thanks for sharing this informative information. I will visit your blog regularly for some latest post.tree trimming companies montgomery

    ReplyDelete
  9. This post is good enough to make somebody understand this amazing thing, and I’m sure everyone will appreciate this interesting things.
    dumpster rental cost springfield

    ReplyDelete
  10. I didn't realized how it is very written everything in here! ADA Compliance Striping San Jose CA

    ReplyDelete
  11. Hi, This is a nice article you shared great information i have read it thanks for giving such a wonderful blog for the reader. septic tank cleaning springfield

    ReplyDelete
  12. You have a good point here!I totally agree with what you have said!! Thanks for sharing your views. hope more people will read this article!!! residential tree services jonesboro

    ReplyDelete
  13. Hello, I have browsed most of your posts. This post is probably where I got the most useful information for my research. Thanks for posting, maybe we can see more on this. Are you aware of any other websites on this subject?
    dumpster rental companies little rock

    ReplyDelete
  14. I have read your article, it is very informative and helpful for me.I admire the valuable information you offer in your articles. Thanks for posting it..drain cleaning service little rock

    ReplyDelete
  15. You have a good point here!I totally agree with what you have said!! Thanks for sharing your views. hope more people will read this article!!! emergency tree services beaumont

    ReplyDelete
  16. Great article and a nice way to promote online. I’m satisfied with the information that you provided junk hauling services corpus christi

    ReplyDelete
  17. This is a great article thanks for sharing this informative information. I will visit your blog regularly for some latest post.grease trap pumping service corpus christi

    ReplyDelete
  18. Thanks for the wonderful share. Your article has proved your hard work and experience you have got in this field. Brilliant .i love it reading. stump grinding lubbock

    ReplyDelete
  19. I think this is one of the most significant information for me. And i’m glad reading your article. dumpster rental services albuquerque

    ReplyDelete

  20. I just can’t stop reading this. Its so fresh, so filled with updates that I just didn’t know. I am delighted to see that people are in fact writing about this subject in such a elegant way, presenting us all diverse parts to it. You’re a fine blogger. Please carry on with it. I can’t wait to read what’s after that. carpet cleaners

    ReplyDelete
  21. I am really enjoying reading your well written articles. It looks like you spend a lot of effort and time on your blog. I have bookmarked it and I am looking forward to reading new articles. Keep up the good work.
    data analytics courses

    data science interview questions

    business analytics courses

    data science course in mumbai

    ReplyDelete
  22. Similarly, you can watch the TV shows Pinoy Tambayan HD such as Pino Ako, Pinoy Tambayan, Pinoy Teleserye Replay, Pinoy1TV, TFC, Pinoy GMA TV replays at anytime or whenever you want. As we know that Filipinos people are so hard working and they keep themselves busy on work. Because of their job, they cannot watch their favorite Pinoy TV shows, ambayan shows or Pinoy Lambingan on television.

    ReplyDelete
  23. My spouse and I love your blog and find almost all of your post’s to be just what I’m looking for. Can you offer guest writers to write content for you?
    I wouldn’t mind producing a post or elaborating on some the subjects you write concerning here. Again, awesome weblog!

    AWS training in chennai | AWS training in anna nagar | AWS training in omr | AWS training in porur | AWS training in tambaram | AWS training in velachery

    ReplyDelete
  24. the post was very nice!
    Visit this blog also for more information

    https://www.raletta.in/blog/work-from-home/

    Thank you

    ReplyDelete
  25. Very nice article, I enjoyed reading your post, very nice share, I want to twit this to my followers. Thanks!.
    Data Science Course in Bangalore

    ReplyDelete
  26. Really nice and interesting post. I was looking for this kind of information and enjoyed reading this one.
    360DigiTMG Data Science Institute in Bangalore

    ReplyDelete
  27. I think about it is most required for making more on this get engaged.

    Data Science Training

    ReplyDelete
  28. Thanks for sharing this article with us this is very useful for us. Visit our blog too Fashion Blog

    ReplyDelete
  29. To establish a network by putting towers in a region we can use the clustering technique to find those tower locations which will ensure that all the users receive optimum signal strength.
    data science training bangalore

    ReplyDelete
  30. really awesome post this is. Truly, one of the best posts I've ever witnessed to see in my whole life. Wow, just keep it up.Learn best Business Analytics Course in Hyderabad

    ReplyDelete
  31. Truly, this article is really one of the very best in the history of articles. I am a antique ’Article’ collector and I sometimes read some new articles if I find them interesting. And I found this one pretty fascinating and it should go into my collection. Very good work!data science certification

    ReplyDelete
  32. This post is very simple to read and appreciate without leaving any details out. Great work!
    data science course hyderabad - 360DigiTMG

    ReplyDelete
  33. Really nice and interesting post. I was looking for this kind of information and enjoyed reading this one. Keep posting. Thanks for sharing.
    python course training in guduvanchery

    ReplyDelete
  34. I truly appreciate essentially perusing the entirety of your weblogs. Basically needed to advise you that you have individuals like me who value your work. Certainly an extraordinary post. Caps off to you! The data that you have given is useful.360DigiTMG data science course

    ReplyDelete
  35. This Was An Amazing ! I Haven't Seen This Type of Blog Ever ! Thankyou For Sharing, data science course in hyderabad

    ReplyDelete
  36. Such a very useful article. Very interesting to read this article.I would like to thank you for the efforts you had made for writing this awesome article. technical training

    ReplyDelete
  37. As forever your articles do move me. Each and every detail you have posted was extraordinary.

    data science courses in delhi

    ReplyDelete
  38. It is a great pleasure to read your message. It's full of information I'm looking for and love to post a comment that says "The content of your post is amazing". Excellent work.

    360DigiTMG Artificial Intelligence Course in Bangalore

    ReplyDelete
  39. Attend The data science course in Hyderabad From ExcelR. Practical data science course in Hyderabad Sessions With Assured Placement Support From Experienced Faculty. ExcelR Offers The data science course in Hyderabad. data science course in Hyderabad

    ReplyDelete
  40. Very nice blogs!!! i have to learning for lot of information for this sites…Sharing for wonderful information.Thanks for sharing this valuable information to our vision. You have posted a trust worthy blog keep sharing, data science online course

    ReplyDelete
  41. When a set of data is given as input by applying certain algorithms, the machine gives us the desired output. data science course syllabus

    ReplyDelete
  42. We are really grateful for your blog post. You will find a lot of approaches after visiting your post. Great work
    best data science courses in hyderabad

    ReplyDelete
  43. Internet has become the biggest platform for millions and billions of users to do myriads of activities and thus leave large sets of data footprints behind which can be consumed by machine-learning algorithms to become more and more effective. data science course syllabus

    ReplyDelete
  44. The article was absolutely fantastic! Lot of great information which can be helpful in some or the other way. Keep updating the blog, looking forward for more contents.
    by Cognex is the AWS Training in Chennai

    ReplyDelete
  45. I curious more interest in some of them hope you will give more information on this topics in your next articles.
    Digital Marketing Courses in Hyderabad With Placements

    ReplyDelete
  46. You finished certain solid focuses there. I did a pursuit regarding the matter and discovered almost all people will concur with your blog.
    https://360digitmg.com/course/certification-program-in-data-science

    ReplyDelete
  47. This was not just great in fact this was really perfect your talent in writing was great.ExcelR Business Analytics Courses

    ReplyDelete
  48. This is my first time i visit here. I found so many entertaining stuff in your blog, especially its discussion. From the tons of comments on your articles, I guess I am not the only one having all the leisure here! Keep up the good work. I have been meaning to write something like this on my website and you have given me an idea.

    data science course in India

    ReplyDelete
  49. the focus shifted to data, analytics and logistics. Today, while designing marketing strategies that engage customers and increase conversion, decision makers observe, analyze and conduct in depth research on customer behavior to get to the roots instead of following conventional methods wherein they highly depend on customer response. data science course syllabus

    ReplyDelete
  50. Excellent Blog! I would like to thank for the efforts you have made in writing this post. I am hoping the same best work from you in the future as well. I wanted to thank you for this websites! Thanks for sharing. Great websites!
    Artificial Intelligence Course

    ReplyDelete
  51. Calculated Fields Form WordPress Plugin In Calculate Field to each other we can use wordpress plugin for calculation. let We explain you how to make Calculation Field in wordpress.

    ReplyDelete
  52. This is additionally a generally excellent post which I truly delighted in perusing. It isn't each day that I have the likelihood to see something like this..
    data science courses in noida

    ReplyDelete
  53. I have bookmarked your site since this site contains significant data in it. You rock for keeping incredible stuff. I am a lot of appreciative of this site.
    data science courses in delhi

    ReplyDelete
  54. Hadoop is an open-source software framework for storing data and running applications on clusters of commodity hardware. It provides massive storage for any kind of data, enormous processing power and the ability to handle virtually limitless concurrent tasks or jobs.
    tally training in chennai

    hadoop training in chennai

    sap training in chennai

    oracle training in chennai

    angular js training in chennai

    ReplyDelete
  55. What a really awesome post this is. Truly, one of the best posts I've ever witnessed to see in my whole life. Wow, just keep it up.
    Best Data Science Courses in Hyderabad

    ReplyDelete
  56. As always your articles do inspire me. Every single detail you have posted was great.
    data science courses in delhi

    ReplyDelete
  57. Nice and very informative blog, glad to learn something through you.
    data science course in noida

    ReplyDelete
  58. There are so many useful information in your post, I like it all the time. This is very useful.
    Peoplesoft Admin Training

    ReplyDelete
  59. Thanks for this, its easy to understand for everyone.

    Camila Jack

    ReplyDelete
  60. This is my first time visit here. From the tremendous measures of comments on your articles.I deduce I am not only one having all the fulfillment legitimately here!
    best data science courses

    ReplyDelete
  61. Hello there to everyone, here everybody is sharing such information, so it's fussy to see this webpage, and I used to visit this blog day by day
    data science course

    ReplyDelete
  62. Hello there to everyone, here everybody is sharing such information, so it's fussy to see this webpage, and I used to visit this blog day by day
    data science course

    ReplyDelete
  63. I was looking at a portion of your posts on this site and I consider this site is really enlightening! Keep setting up..
    business analytics course aurangabad

    ReplyDelete
  64. I was looking at a portion of your posts on this site and I consider this site is really enlightening! Keep setting up..
    data science courses in gurgaon

    ReplyDelete
  65. Thanks for Sharing This Article.It is very so much valuable content. I hope these Commenting lists will help to my website
    data science training in noida

    ReplyDelete
  66. nice blog!! i hope you will share a blog on Data Science.
    data science training in noida

    ReplyDelete
  67. Communication is a two way process. If done properly, it gives excellent result. Thus opting for the best Integrated Marketing Communication Course on Talentedge is wise. To know more visit:

    ReplyDelete
  68. Thanks for sharing such nice info. I hope you will share more information like this. please keep on sharing!

    Python Training In Bangalore
    AWS Training In Bangalore

    ReplyDelete
  69. Nice and very informative blog, glad to learn something through you.
    machine learning course in aurangabad

    ReplyDelete
  70. Very interesting and thanks for sharing such a good blog. keep sharing.
    data scientist Course in pune

    ReplyDelete
  71. I read your article it is very interesting and every concept is very clear, thank you so much for sharing. AWS Certification Course in Chennai


    ReplyDelete
  72. It’s difficult to find experienced people for this subject, however, you sound like you know what you’re talking about! Thanks
    data scientist training and placement

    ReplyDelete
  73. Good blog,

    ACCA Coaching kerala, ACCA Coaching Center in kerala, ACCA Classes in kerala, ACCA Coaching Classes kerala, Best ACCA Coaching in kerala, No:1 ACCA Coaching Center in kerala, Top 10 ACCA Coaching Centers in kerala, ACCA Online Courses, ACCA Training, ACCA IFRS course, ACCA IFRS Certification, ACCA Online Coaching, ACCA Certification Courses, ACCA SBR Online Courses

    https://ffacademia.com

    ReplyDelete
  74. nice blog!! i hope you will share a blog on Data Science.
    data science course malaysia

    ReplyDelete
  75. Wonderful blog. I delighted in perusing your articles. This is genuinely an incredible perused for me. I have bookmarked it and I am anticipating perusing new articles. Keep doing awesome!
    data science certification

    ReplyDelete
  76. It was a good experience to read about dangerous punctuation. Informative for everyone looking on the subject.
    data scientist training and placement in hyderabad

    ReplyDelete
  77. I am delighted to discover this page. I must thank you for the time you devoted to this particularly fantastic reading !! I really liked each part very much and also bookmarked you to see new information on your site.

    Digital Marketing Course in Bangalore

    ReplyDelete
  78. He's really nice and mean. it's a really cool blog. The link is a very useful thing. You have really helped a lot of people who visit the blog and give them useful information.

    Digital Marketing Course in Bangalore

    ReplyDelete
  79. Such a very useful information!Thanks for sharing this useful information with us. Really great effort.
    ai courses in aurangabad

    ReplyDelete
  80. Excellent website. I was always checking this article, and I’m impressed! Extremely useful and valuable info specially the last part, I care for such information a lot. Thanks buddy.
    Data Science Training in Hyderabad
    Data Science Course in Hyderabad

    ReplyDelete
  81. Excellent post. I want to thank you for this informative read, I really appreciate sharing this great post. Keep up your work.
    DevOps Training in Hyderabad
    DevOps Course in Hyderabad

    ReplyDelete
  82. Amazing blog.Thanks for sharing such excellent information with us. keep sharing...
    data science courses aurangabad

    ReplyDelete
  83. Amazing blog.Thanks for sharing such excellent information with us. keep sharing...
    data science courses in aurangabad

    ReplyDelete
  84. Amazing blog.Thanks for sharing such excellent information with us. keep sharing...
    data scientist training in aurangabad

    ReplyDelete
  85. Good post! Thanks for sharing this information I appreciate it.lovely blog, simply outstanding.https://kissasiane.com/

    ReplyDelete

  86. Title:
    Oracle PLSQL Training in Chennai | Infycle Technologies


    Description:
    Learn Oracle PLSQL Training in Chennai for excellent job opportunities from Infycle Technologies, the best Oracle Training Institute in Chennai. Infycle Technologies is the best & trustworthy software training center in Chennai, applies full hands-on practical training with professional trainers in the field. In addition to that, the mock placement interviews will be arranged by the alumni for the candidates, so that, they can meet the job interviews without missing them. For transforming your career to a higher level call 7502633633 to Infycle Technologies & grab a free demo session to know more.

    Best training in Chennai

    ReplyDelete
  87. Title:
    Best Data Science training in Chennai | Infycle Technologies

    Description:
    Infycle Technologies is the best software training center in Chennai, providing amazing Data Science training in Chennai which will be realistic and taught by industry experts. Aside from practical training preparation, mock interviews will be arranged for students so that they can confidently face the interviews. All of this will be packed up by full placement assurance with the best salary package from top companies. For having a free demo session, call 7502633633.

    best training institute in chennai

    ReplyDelete
  88. This post is very simple to read and appreciate without leaving any details out. Great work!
    data science course in aurangabad

    ReplyDelete
  89. Decent Information, significant and magnificent plan, as offer great stuff with smart thoughts and ideas, loads of extraordinary Information and motivation, the two of which I want, on account of deal such an accommodating Information.

    AI Training in Hyderabad

    ReplyDelete
  90. It's like you've got the point right, but forgot to include your readers. Maybe you should think about it from different angles.

    Artificial Intelligence Courses in Bangalore

    ReplyDelete
  91. Always drink plenty of water when you are practicing or UFA Web playing football. It is very easy to get dehydrated during a game or during practice. This will not only impact your performance, but it could be dangerous as well. Drink plenty of fluids before, during and after any football related activity.

    ReplyDelete
  92. Check your file size when downloading music. Most music files are about two to five megabytes. If you find that a file is chordasli.com much smaller, it might be a text file disguised as a music download. By downloading it, you could be putting your computer at risk of viruses, jeopardizing your personal information.

    ReplyDelete
  93. It's like you've got the point right, but forgot to include your readers. Maybe you should think about it from different angles.
    Data Analytics Course in Bangalore

    ReplyDelete
  94. Excellent effort to make this blog more wonderful and attractive.
    data analytics courses in hyderabad

    ReplyDelete
  95. The first step is to use the profiler of your choice. Find out more also about Furnace Repair Spokane

    ReplyDelete
  96. Thank you for sharing! Amazingly beautiful. Looking for the best Smart Home installer

    ReplyDelete
  97. IMPORTANT!!! A reputable service provider will not demand payment in advance.
    I discovered a service that assisted me with my personal problems.
    He takes you step by step through checking calls, social media messengers, location, and a slew of other features to keep track of daily online activities.
    There will be demo videos available to watch.
    You'll get a full demo before you pay anything.
    This is how you can get in touch with them.
    www🟢remotemobileaccess🟢COM

    ReplyDelete
  98. Very impressive!!! When I searched for this, I found this website at the top of all the blogs in the search engines.

    Data Science Course in Gorakhpur

    ReplyDelete
  99. Excellent knowledge shared about java mixed mode frame , Thanks to you. sod installer

    ReplyDelete
  100. All of these posts were incredible perfect. It would be great if you’ll post more updates.data science certification course in chennai

    ReplyDelete
  101. The blog was useful in knowing about book life.Excellent blog thanks for sharing the valuable information..it becomes easy to read and easily understand the information.Create you own project from us Visit ieee gsm & gps projects!

    ReplyDelete
  102. 360DigiTMG offers courses ranging for basic to advanced, start your career journey with us and let us aid you in bagging your dream job.

    Data Science Course in Bangalore with Placement

    ReplyDelete
  103. Hello Guys, I am very glade to see your article. you have obeviously share very important information. Here also, i am sharing article related to your post that may certainly helpful for you.
    Thank You Very Much.
    idm-crack
    iobit-uninstaller-pro-crack
    winrar-zip-filer-crack
    windows-activator-crack
    adobe-photoshop-cc-crack/

    ReplyDelete
  104. Thanks for sharing such a great and informative blog. Looking for more. raleigh-tree-removal

    ReplyDelete
  105. Great and informative article. Keep up the good work. colorado-custom-decks

    ReplyDelete
  106. With Java Profilers, we can get information about Java process only. However with Java Mixed-Mode Flame Graphs, we can see how much CPU time is spent in Java methods, system libraries and the kernel. Mixed-mode means that the Flame Graph shows profile information from both system code paths and Java code paths. www.avalonhavasu.com/

    ReplyDelete
  107. it is very nice https://navedtech.com/

    ReplyDelete
  108. very nice and amazing website https://cracksuite.com/

    ReplyDelete
  109. A flame graph displays a distributed request trace and uses a timed, color-coded horizontal bar to indicate each service call that took place along the request's execution path. Flame graphs for distributed traces contain error and delay information to assist programmers in locating and resolving application bottlenecks.

    Commercial Tree Service Spokane is our number one tree care service to rely on.

    ReplyDelete
  110. Thank you for providing such useful information regarding Blogspot.https://www.rrtechnosoft.co.in/index.htmlhref=" https://www.rrtechnosoft.co.in/
    ">Devops Training Institute in KPHB

    ReplyDelete
  111. Flame graphs for distributed traces contain error and delay information to assist programmers in locating and resolving application bottlenecks.

    Anyways lets visit the Harrisonburg Commercial Concrete

    ReplyDelete
  112. I need this. Thanks for posting this. Glad that I found this website. Pool Removal Joliet, IL

    ReplyDelete
  113. Hi,
    This post is an excellent resource for individuals interested in performance analysis and optimization of software applications. It's well-structured, informative, and provides a step-by-step guide to setting up the environment and generating mixed-mode flame graphs for Java applications.
    Data Analytics Courses in Pune

    ReplyDelete
  114. This article likely explores the generation of mixed mode flame graphs in Java, offering insights into profiling and optimizing Java applications, a valuable resource for developers.

    Data Analytics Courses In Kochi



    ReplyDelete
  115. This comment has been removed by the author.

    ReplyDelete
  116. This article provides a concise yet informative overview of the topic. The author's clear and engaging writing style made it easy to understand the key points. I appreciated the inclusion of relevant examples and statistics, which added depth to the discussion. Overall, a well-written piece that offers valuable insights into the subject matter. I look forward to reading more from this author in the future. visiochart

    ReplyDelete
  117. Impressive work! This detailed guide and automation script make reproducing Brendan Gregg's mixed-mode flame graphs a breeze. Your thorough documentation is a valuable contribution to the community. Well done.
    Data Analytics Courses In Dubai

    ReplyDelete
  118. Outstanding effort! Reproducing Brendan Gregg's mixed-mode flame graphs is simple with the help of this thorough manual and automation script. Your meticulous documentation is an important service to the neighbourhood. Good work.
    Data Analytics Courses in Agra

    ReplyDelete
  119. I found the section where you discuss the benefits of mixed-mode flame graphs particularly insightful. Thanks for sharing your knowledge.
    Data Analytics Courses In Chennai

    ReplyDelete
  120. Your writing style is engaging and the content is spot-on. Well done!

    ReplyDelete
  121. I like your blog! The detailed step-by-step guide for setting up and generating mixed-mode flame graphs with Java and various tools is very informative.
    Also Read: Java Spring Boot Simplifying Enterprise Application Development

    ReplyDelete
  122. Great and insightful tutorial on Generating Java Mixed Mode Flame Graphs thanks for valuable blog post.
    data analyst courses in limerick

    ReplyDelete
  123. very informative blog on generating java mixed mode flame graphs, very insightful.
    financial modelling course in melbourne

    ReplyDelete
  124. Thanks for sharing this information to increase our knowledge. Looking forward for more on your site. Gutter Services Near Me

    ReplyDelete
  125. Thank you for sharing in depth explanation and tutorial on generating mixed-mode flame graphs .
    Digital Marketing Courses In Bhutan

    ReplyDelete
  126. The concept of Mixed Mode Flame Graphs is powerful, and your thorough breakdown of the process, from data collection to visualization, provides a comprehensive understanding of the profiling workflow. I appreciate the attention to detail in addressing the complexities of Java profiling and the inclusion of practical examples that showcase the real-world applications of flame graphs. Digital Marketing Courses In Norwich

    ReplyDelete
  127. What an exquisite article! Your post is very helpful right now. Thank you for sharing this informative one. Roofing Contractor

    ReplyDelete
  128. Thank you for the step-by-step instructions. This was very easy to follow.

    Investment banking courses in Germany

    ReplyDelete
  129. Awesome post! Been reading a lot of info like this! Thanks. Drywall Contractor Services

    ReplyDelete
  130. Generating Java Mixed Mode Flame Graphs is an invaluable practice for profiling and visualizing performance bottlenecks in a Java application's execution flow. These flame graphs provide a comprehensive view of both Java and native code interactions
    investment banking free course

    ReplyDelete
    Replies
    1. We are a local Milton Ontario fencing company with many years of experience installing several fences and decks ranging from cedar, privacy fences, security, and vinyl fences. We also have a team of qualified deck contractors who work with you to design and beautify your outdoor space. Fencing Services Company

      Delete



  131. Dr. Sayedul Haque is a renowned expert in the medical field of Bangladesh, specializing in gastroenterology, hepatology and internal medicine. His expertise in these areas and his commitment to patient care make him a highly respected and sought after physician. More information here best gastroenterology doctor in bangladesh<

    ReplyDelete
  132. Your blog consistently presents high-quality content. It's always a pleasure to visit! Local Roofing Services

    ReplyDelete
  133. Your site loads so quickly; it's impressively optimized. Meet John Smith, Demolition Pro

    ReplyDelete
  134. consistently presents high-quality content. It's always a pleasure to visit! Local Vaughan physio

    ReplyDelete
  135. The information you've shared is of great value; my appreciation for your contribution. https://www.contractormilton.com

    ReplyDelete
  136. Get ready to hit the trails with confidence, thanks to our versatile Best Hiking Backpack with Water Bladder.

    ReplyDelete

Post a Comment

Popular posts from this blog

Basic Web Performance Testing With JMeter and Gatling

Introduction In this post I'll give a quick way to get some basic web performance metrics using both JMeter and Gatling . JMeter is a well known, open source, Java based tool for performance testing. It has a lot of features, and can be a little confusing at first. Scripts (aka Test Plans), are XML documents, edited using the JMeter GUI.  There are lots of options, supports a wide variety of protocols, and produces some OK looking graphs and reports. Gatling is a lesser known tool, but I really like it. It's a Scala based tool, with scripts written in a nice DSL. While the scripts require some basic Scala, they are fairly easy to understand and modify. The output is a nice looking, interactive, HTML page. Metrics   Below are the basic metrics gathered by both JMeter and Gatling . If you are just starting performance testing, these might be a good starting point . Response Time – Difference between time when request was sent and time when response has been fully rec

Multi Threaded NUnit Tests

Recently I needed to reproduce an Entity Framework deadlock issue. The test needed to run in NUnit, and involved firing off two separate threads. The trouble is that in NUnit, exceptions in threads terminate the parent thread without failing the test. For example, here's a test that starts two threads: the first thread simply logs to the console, while the other thread turfs an exception. What I expected was that this test should fail. However, the test actually passes. readonly ThreadStart[] delegates = { () => { Console.WriteLine("Nothing to see here"); }, () => { throw new InvalidOperationException("Blow up"); } }; [Test] public void SimpleMultiThreading() { var threads = delegates.Select(d => new Thread(d)).ToList(); foreach (var t in threads) { t.Start(); } foreach (var t in threads) { t.Join(); } } Peter Provost posted an article that describes how to make this test fail. It