Follow by Email

Monday, 17 February 2014

AtomicInteger Java 7 vs Java 8

Atomic Integer is interesting class, it is used for building many lock free algorithm. Infact JDK locks are also build using ideas from Atomic datatypes.

As name suggest it is used for doing atomic increment/decremented, so you don't have to use locks, it will use processor level instruction to do so.
It is based on Compare-and-swap instruction.

Issue with CAS
CAS works on optimistic approach, it expects some failure, so it will retry operation, so in theory if there is no contention then it should work pretty fast.

There is another alternate way of doing same thing using Fetch-and-add.
Fetch-and-add is very different from CAS, it is not based on re-try loops.

Dave Dice compares CAS vs Fetch-and-add in atomic_fetch_and_add_vs blog, i can't explain better than this, so i will copy content from his blog


  1. CAS is "optimistic" and admits failure, whereas XADD does not. With XADD there's no explicit window of vulnerability to remote interference, and thus no need for a retry loop. Arguably, XADD has better progress properties, assuming the underlying XADD implementation doesn't have an implicit loop, but even in that case the window would be narrower than with Load;Φ;CAS.
  2. Lets say you were trying to increment a variable with the usual Load;INC;CAS loop. When the CAS starts failing with sufficient frequency you can find that the branch to exit the loop (normally taken under no or light contention) starts to predict toward the failure path. So when the CAS ultimately succeeds, you'll incur a branch mispredict, which can be quite painful on processors with deep pipelines and lots of out-of-order speculative machinery. Typically, this is in a piece of code where you don't want a long stall. There's no loop and no such issues with XADD.
Since fetch-and-add has predictable progress properties, so it is used for developing waiting free algorithms.
Unfortunately JDK 7 does not have support for fetch-and-add, one more reason why C++ people will be happy that C++ is great!


As we all know things do change & java community decided to added support for fetch-and-add in JDK8, one more good reason to migrate to JDK8.

In this blog i will compare performance of AtomicInteger from JDK7 & 8

Atomic Integer - JDK 7 vs JDK 8

In this test i increment counter 10 Million times with different number of threads. Thread numbers are increased to see how counter performs under contention.



X Axis - No of Threads
Y Axis - Ops/Second - Higher is better

JDK8 counter is winner in this case, best performance is when there is no contention , for JDK7 it is 80 MOPS but for JDK8 it close to 130 MOPS.
For single thread difference is not much , JDK8 is around 0.5 times faster but as contention increases performance JDK7 counter starts falling.

I will put another graph by removing 1 thread number, so that we can clearly see how these counter performs.


This gives better idea of how slow JDK7 atomic integer is, for 8 threads JDK8 counter is around 3.5X times faster.

Dive Into Code

JDK 8 - AtomicInteger
public final int getAndIncrement() {
        return unsafe.getAndAddInt(this, valueOffset, 1);
    }

JDK7 - AtomicInteger
 public final int getAndIncrement() {
        for (;;) {
            int current = get();
            int next = current + 1;
            if (compareAndSet(current, next))
                return current;
        }
    }

JDK8 is using new function(getAndAddInt) from unsafe to do the magic. Unsafe has become more useful!

Dive in Assembly
To just confirm that all performance again is coming from fetch-and-add i had look at assembly generated.

JDK 8 
0x0000000002cf49c7: mov    %rbp,0x10(%rsp)
  0x0000000002cf49cc: mov    $0x1,%eax
  0x0000000002cf49d1: lock xadd %eax,0xc(%rdx)  ;*invokevirtual getAndAddInt
                                                ; - java.util.concurrent.atomic.AtomicInteger::incrementAndGet@8 (line 186)


JDK 7

0x0000000002c207f5: lock cmpxchg %r8d,0xc(%rdx)
  0x0000000002c207fb: sete   %r11b
  0x0000000002c207ff: movzbl %r11b,%r11d        ;*invokevirtual compareAndSwapInt
                                                ; - java.util.concurrent.atomic.AtomicInteger::compareAndSet@9 (line 135)
                                                ; - java.util.concurrent.atomic.AtomicInteger::incrementAndGet@12 (line 206)

  
Conclusion
Introduction of fetch-and-add type of feature in java will make it more suitable for high performance computing, we will see more wait free algorithm in java

Code used for testing is available @ AtomicCounterTest
Just compile for jdk7/8 and execute it.

196 comments:

  1. All your blogs are interesting and informative. Attaching code snippets is a great add on.

    ReplyDelete
  2. Good to hear that you find is useful.
    I do add link to GitHub that has code, I avoid adding code snippets to keep blog small, but try to include some in future post.

    ReplyDelete
  3. It was very useful for me. Keep sharing such ideas in the future as well. Website Design Company Bangalore | Web Designing Bangalore

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

    ReplyDelete
  5. According to wiki https://en.wikipedia.org/wiki/Fetch-and-add a consensus number is equal to 2. My understanding of that fact is that only up to 2 threads can act on a shared AtomicInteger without some waiting/congestion.
    How would you explain significant drop in performance of fetch-and-add between 1 and 2 threads (and not between 2 and 3).
    Similarly, why fetch-and-add performance degradation while comparing 2 threads with 3 threads is of same magnitude as when comparing 3 and 4 threads?

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

    ReplyDelete
  7. I checked unsafe.getAndAddInt implementation in Java 8 and it is still using compareAndSwap:
    public final int getAndAddInt(Object var1, long var2, int var4) {
    int var5;
    do {
    var5 = this.getIntVolatile(var1, var2);
    } while(!this.compareAndSwapInt(var1, var2, var5, var5 + var4));

    return var5;
    }

    I'm not sure where you're taking the information about the fetch and add

    ReplyDelete
    Replies
    1. I wrote short blog post to answer this question.
      http://ashkrit.blogspot.com/2017/07/java-intrinsic-magic.html

      Delete
  8. Super blog and very interesting information which I always wanted to search many article but you article is really fantastic.

    graphic designer in dubai

    ReplyDelete
  9. I’ve read several good stuff here. Definitely price bookmarking for revisiting. I wonder how a lot effort you put to create this sort of wonderful informative web site.
    Nadkaar - Dubai Website Design

    ReplyDelete
  10. Really informative and helpful blog. It gives a clear view of Java 7 and 8.
    SEO experts Dubai

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

    ReplyDelete
  12. good one, im waiting for more articlest like this. keep up the good work.
    SEO Dubai

    ReplyDelete
  13. This blog is really helpful regarding all educational knowledge I earned. It covered a great area of subject which can assist a lot of needy people. Everything mentioned here is clear and very useful.
    Content marketing montreal

    ReplyDelete
  14. Awesome post dude its so much informative for the followers and so much helpful also.I appreciate you for this great post.Thanks for sharing.Keep it up.

    Mobile App Development company Jordan | Digital Marketing Company Jordan | Blockchain Development Company in Jordan | Web Development Company in Jordan

    ReplyDelete
  15. Thanks for sharing the great post.
    SMS is a great way of doing marketing. Many business giants are using text messaging to increase their sales.

    ReplyDelete
  16. I found this post interesting and worth reading. Keep going and putting efforts into good things.
    Yasir Jamal - Web design Dubai

    ReplyDelete
  17. I have been reading your blogs and I really started liking it.
    SEO Dubai

    ReplyDelete
  18. This blog is useful as well as informative. Keep sharing such blogs I really like your posts.
    Greeting cards Dubai

    ReplyDelete
  19. Hi! Thank you for the share this information. This is very useful information for online blog review readers. Keep it up such a nice posting like this.
    Website Design
    SEO Company

    ReplyDelete
  20. This is really interesting post,Appreciate the effort in educating us. We do provide
    Web Design Company in Bangalore

    ReplyDelete
  21. hey i loved your site layout and especially the way you wrote everything. I must say that you keep posting this type of information so that we may see the latest news.
    Seo Expert In Pakistan

    ReplyDelete
  22. Hey Thanks for sharing this valuable information with us. I will come back to your site and keep sharing this information with us.pandaexpress.com/feedback

    ReplyDelete
  23. Hi,

    Thanks for sharing a very interesting article about AtomicInteger Java 7 vs Java 8. This is very useful information for online blog review readers. Keep it up such a nice posting like this.

    Regards,
    WondersMind,
    Best Website Design Company in Bangalore

    ReplyDelete
  24. Hey Thanks for sharing this valuable information with us. I will come back to your site and keep sharing this information with us. I must say that if you are interested in FMCdealer quick step by step login guide to ford employees then do visit FMC Dealer Direcrt Official Website fmcdealer

    ReplyDelete
  25. To find the best short term rentals in dubai i will suggest you to visit the MEX Holiday Homes Dubai office if you're looking to plan you vacations soon in Dubai.

    ReplyDelete

  26. ACME SURVEY
    : Step by Step Guide to take ACME customer satisfaction survey. Enjoy free coupons which can allow you to buy free things on next visit.
    Ready to win rewards? The latest & Updated Step by Step Guide for ACME survey online

    ReplyDelete
  27. Hey I loved the way you shared the valuable information with the community. I would say that please continue these efforts and we want to hear more from you.pandaexpress.com/feedbacktalktowendys

    ReplyDelete
  28. To find the best short term rentals in dubai i will suggest you to visit the MEX Short Term Rentals Dubai office if you're looking to plan you vacations soon in Dubai.

    ReplyDelete
  29. The most authentic post ever i read about this topic so far i must say you have cleared all the required info thank for sharing, keep up the good work and find best e-ticket, visa and travel insurance services at Malik Express.

    ReplyDelete
  30. Really like this post of yours about the latest activity you performed and shared with us thanks keep up the good work and don't forget to win $500 via TellTheBell survey by Taco Bell.

    ReplyDelete
  31. The most authentic post ever i read about the topic so far i must say you have cleared all the

    required info thank for sharing, keep up the good work and win $2 Gift Cards at moegottaknow survey.

    ReplyDelete
  32. Hey Thanks for sharing this valuable information with us. I will come back to your site and keep sharing this information with us.ncsecu login everydaysolutionsforu

    ReplyDelete
  33. Thanks for sharing your ideas. I was desperately waiting for such posts. I really appreciate your efforts and I will be waiting for your further write ups thanks once again.Seo Expert in Pakistan

    ReplyDelete
  34. Thanks for sharing the valuable information to us. Web development company NZ

    ReplyDelete
  35. I must say that the blog is great! I really like it an appreciate your efforts you put in it.
    SEO Services is an imperative marketing strategy that affects your business in a positive way by increasing the conversion rate and improving the sales.

    ReplyDelete

  36. Thank Your for sharing such a useful review.. If you want to visit Pakistan.. do Visit Hunza with Hunza Tour Packages we provide the best Tour services in Pakistan

    ReplyDelete
  37. Wonderful post! An opportunity to read a fantastic and imaginary blogs, I really like to read your blog, the points you have mentioned in this article are helpful for me, thank you so much for share this awesome blog post. We are the best award winning web development company in New Zealand. Please Visit Tandem NZ

    ReplyDelete
  38. It’s hard to come by experienced people about this subject, but you seem like you know what you’re talking about! Thanks
    getmyoffersguide.com

    ReplyDelete
  39. You ought to be a part of a contest for one of the finest sites on the internet. I will recommend this web site!
    https://www.creditscardsadviser.com/
    https://www.creditscardsbenefits.com/

    ReplyDelete
  40. Πολύ μεγάλο άρθρο. Σας ευχαριστώ. Μπορεί όλα τα καλά πράγματα να έρχονται σε σας. Αντίο

    Bồn ngâm massage chân

    Bồn ngâm chân

    Có nên dùng bồn ngâm chân

    Cách sử dụng bồn ngâm chân

    ReplyDelete
  41. Hey Thanks for sharing this valuable information with us. I will come back to your site and keep sharing this information with us. Win Prizes by taking surveys

    ReplyDelete
  42. Hey Nice Blog!! Thanks For Sharing!!!Wonderful blog & good post.Its really helpful for me, waiting for a more new post. Keep Blogging!
    SEO company in coimbatore
    Digital Marketing Company in Coimbatore
    SEO Services in coimbatore

    ReplyDelete
  43. As you grow, you will(nhà khung thép giá rẻ) realize that arguing right and wrong more than(so sánh gạch nung và gạch không nung) losing to others is sometimes not important anymore.(tam san be tong sieu nhe) Most importantly, just want peace.

    ReplyDelete
  44. Nice post!Everything about the future(giá nhà khung thép) is uncertain, but one thing is certain: God has set tomorrow for all of us(tấm bê tông siêu nhẹ). We must now trust him and in this regard, you must be(chi phí xây dựng nhà khung thép) very patient.

    ReplyDelete
  45. Hey Thanks for sharing this valuable information with us. I will come back to your site and keep sharing this information with us.
    Captions
    captions
    Captions
    captions

    ReplyDelete
  46. Amazing website. Great information provided. Learned a lot. Thank you
    https://platinumoffersonline.com/

    ReplyDelete
  47. Ever heard that Wendys is offering you the chance to take surveyforcustomers Customer Satisfaction Survey where you can win Free BOGO Sandwiches and much more at Wendys Restaurant.

    ReplyDelete
  48. The topic of this post is very interesting for me. I am very much impressed after reading this post and I must appreciate your effort in sharing this post with us here.
    Best affordable SEO Services

    ReplyDelete
  49. Lets state you were attempting to increase a variable with the typical Load;INC;CAS circle. At the point when the CAS begins falling flat with adequate recurrence you can find that the branch to leave the circle (ordinarily taken under no or light conflict) begins to anticipate toward the disappointment way. So when the CAS at sareen air last succeeds, you'll bring about a branch mispredict, which can be very difficult on processors with profound pipelines and bunches of out-of-request theoretical apparatus. Ordinarily, this is in a bit of code where you don't need a long slow down. There's no circle and no such issues with XADD.

    ReplyDelete
  50. What an amazing post you written really love the post please do tell me how to subscribe your blog as and one more thing visit https://kroger-feedback-survey.com/ and win free $5000 gift cards for Kroger grocery stores to shop for free.

    ReplyDelete
  51. ඔබේ කාර්යය සෑම විටම හොඳයි, වඩාත් රසවත් ලිපි තිබිය යුතුය.

    cần mua chó Poodle

    cách nuôi chó Poodle

    đặc điểm chó Poodle

    Nguồn gốc chó Poodle

    ReplyDelete
  52. Hi blogger, i must say you have hi quality articles here.
    Your website can go viral. You need initial traffic boost only.
    How to get it? Search for; make your content go viral Wrastain’s tools
    web application development company in India | ecommerce web development

    ReplyDelete
  53. នេះគឺជាផ្នែកមួយនៃអត្ថបទដ៏ត្រជាក់បំផុតនៃសតវត្សទី។ សូមអរគុណចំពោះការចែករំលែក។ សូមជូនពរអ្នកអោយមានសំណាងនិងជោគជ័យ!

    C.ty bán cửa lưới tại huyện Đông Anh

    Đại lý cửa lưới chống muỗi tại Quảng Ninh

    Siêu thị cửa lưới chống muỗi tại Linh Đàm

    Siêu thị bán cửa chống muỗi phường Phương Mai

    ReplyDelete
  54. Nice Blog, Thanks for sharing! Also check my website
    digital marketer in coimbatore

    ReplyDelete
  55. Bài viết bạn rất hay:



    Chúng tôi là đơn vị cung cấp các sản phẩm chất lượng như:



    lều xông hơi



    lều xông hơi sau sinh



    lều xông hơi giá bao nhiêu


    ReplyDelete
  56. Bài viết bạn rất hay:



    Chúng tôi là đơn vị cung cấp các sản phẩm chất lượng như:



    Giảo cổ lam



    giảo cổ lam giải độc gan



    giảo cổ lam giảm béo

    ReplyDelete
  57. Interesting post. I Have Been wondering about this issue, so thanks for posting. Pretty cool post.It 's really very nice and Useful post.Thanks
    obat benjolan di labia mayora
    obat kista ovarium paling ampuh
    pengobatan cedera saraf tulang belakang

    ReplyDelete
  58. Ցանկանում եմ շնորհակալություն հայտնել ձեզ: Շատ հետաքրքիր եւ հետաքրքիր հոդված ստեղծելու համար: Good luck

    lều xông hơi loại nào tốt

    lều xông hơi cá nhân

    bán lều xông hơi

    mua lều xông hơi ở đâu

    ReplyDelete
  59. Thanks for sharing very informative and easily understanding blog with us. This blog is very helpful for all the people who are unaware about such things. Please keep on posting.
    AI Companies in India
    Redbus mobile app cost in Bangalore
    Ola mobile app cost in Bangalore

    ReplyDelete
  60. Si el agua cae al lago, desaparecerá( phụ kiện tủ bếp ). Pero si cae a la hoja de( phụ kiện tủ áo ) loto, brillará como una joya. Caer igual pero( thùng gạo thông minh ) estar con alguien es importante.

    ReplyDelete
  61. GCC web hosting is a leading web hosting and domain registrar in the heart of UAE, Dubai.

    ReplyDelete
  62. Wonderful blog post. I was viewing continuously this website and I am satisfied! Highly beneficial information particularly the last part. I take care of this kind of information much. I was seeking this specific information for a long time. Thanks and good luck.
    Management your google Ads

    ReplyDelete
  63. It’s hard to come by experienced people about this subject, but you seem like you know what you’re talking about! Thanks
    https://myinstantofferonline.com/
    https://www.peryourhealthonline.com/
    https://www.myindigocardoffer.com/

    ReplyDelete
  64. Bài viết rất hay: Chúng tôi chuyên cung cấp các sản phẩm chất lượng sau:



    bồn massage



    bon ngam chan



    máy massage chân



    Cảm ơn các bạn!

    ReplyDelete
  65. Nice.

    Freshpani is providing online water delivery service currently in BTM, Bangalore you can find more details at Freshpani.com
    Online Water Delivery | Bangalore Drinking Water Home Delivery Service | Packaged Drinking Water | Bottled Water Supplier

    ReplyDelete
  66. I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.yourcar.pk/

    ReplyDelete
  67. ನಿಮ್ಮ ಕುಟುಂಬ ಮತ್ತು ಪ್ರೀತಿಪಾತ್ರರ ಜೊತೆ ನಿಮಗೆ ಹೊಸ ಮತ್ತು ಸಂತೋಷದ ಹೊಸ ವಾರ ಶುಭಾಶಯಗಳು. ಲೇಖನವನ್ನು ಹಂಚಿಕೊಂಡಿದ್ದಕ್ಕಾಗಿ ಧನ್ಯವಾದಗಳು

    lều xông hơi mini

    mua lều xông hơi ở đâu

    lều xông hơi gia đình

    bán lều xông hơi

    xông hơi hồng ngoại

    ReplyDelete

  68. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.smm.com.pk/"

    ReplyDelete
  69. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.smm.com.pk/"

    ReplyDelete
  70. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.smm.com.pk/

    ReplyDelete
  71. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo expert pakistan

    ReplyDelete
  72. "I loved the post, keep posting interesting posts. I will be a regular reader...

    http://skyled.pk/"

    ReplyDelete
  73. I loved the post, keep posting interesting posts. I will be a regular reader...

    Seo Expert Pakistan

    ReplyDelete
  74. Një artikull shumë interesant dhe interesant. Faleminderit për ndarjen

    Phụ kiện tủ bếp
    Phụ kiện tủ bếp cao cấp

    ReplyDelete
  75. I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.smm.com.pk/seo-expert-consultant-pakistan/

    ReplyDelete
  76. I loved the post, keep posting interesting posts. I will be a regular reader...

    SEO Expert In Pakistan

    ReplyDelete
  77. "I loved the post, keep posting interesting posts. I will be a regular reader...

    http://hnl.com.pk"

    ReplyDelete
  78. "I loved the post, keep posting interesting posts. I will be a regular reader...

    http://hnl.com.pk

    ReplyDelete
  79. """I loved the post, keep posting interesting posts. I will be a regular reader...


    http://skyled.pk/"

    ReplyDelete
  80. "I loved the post, keep posting interesting posts. I will be a regular reader...

    http://hnl.com.pk

    ReplyDelete
  81. "I loved the post, keep posting interesting posts. I will be a regular reader...

    http://hnl.com.pk

    ReplyDelete
  82. Such a nice peice of information. Summed up all the things in a perfect way. https://www.endconsultant.com

    ReplyDelete
  83. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hairclinic.pk

    ReplyDelete
  84. "I loved the post, keep posting interesting posts. I will be a regular reader...

    http://alliedmaterials.com.pk"

    ReplyDelete
  85. Hey, I loved the way you shared the valuable information with the community. I would say that please continue these efforts and we want to hear more from you.
    HamzaAndHamzaTaxReturns

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

    ReplyDelete
  87. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://alliedmaterials.com.pk/

    ReplyDelete
  88. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://alliedmaterials.com.pk/

    ReplyDelete
  89. This is a decent post. This post gives genuinely quality data. I'm certainly going to investigate it. Actually quite valuable tips are given here. Much obliged to you to such an extent. Keep doing awesome. To know more information about
    Contact us :- https://www.login4ites.com/

    ReplyDelete
  90. It is brilliant substance. I for the most part visit numerous locales however your site has something unique highlights. I for the most part visit on your site. Best Seo Tips
    Contact us- https://myseokhazana.com

    ReplyDelete
  91. Hey, very nice site. I came across this on Google, and I am stoked that I did. I will definitely be coming back here more often. Wish I could add to the conversation and bring a bit more to the table, but am just taking in as much info as I can at the moment. Thanks .

    DedicatedHosting4u.com

    ReplyDelete
  92. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hairclinic.pk

    ReplyDelete
  93. """I loved the post, keep posting interesting posts. I will be a regular reader...

    hairclinic.pk

    ReplyDelete
  94. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.hairclinic.pk/

    ReplyDelete
  95. Such a nice peice of information. Summed up all the things in a perfect way. https://www.endconsultant.com

    ReplyDelete
  96. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.endconsultant.com/

    ReplyDelete
  97. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hairclinic.pk"

    ReplyDelete
  98. """I loved the post, keep posting interesting posts. I will be a regular reader...

    http://www.alfalahhost.com/

    ReplyDelete
  99. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://alliedmaterials.com.pk/

    ReplyDelete
  100. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant pakistan

    ReplyDelete
  101. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant in lahore

    ReplyDelete
  102. """I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.endconsultant.com/

    ReplyDelete
  103. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.hairclinic.pk/

    ReplyDelete
  104. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant in karachi

    ReplyDelete
  105. """I loved the post, keep posting interesting posts. I will be a regular reader...

    https://alliedmaterials.com.pk/

    ReplyDelete
  106. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant in rawalpindi

    ReplyDelete
  107. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hairclinic.pk

    ReplyDelete
  108. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant in pakistan

    ReplyDelete
  109. """I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.hairclinic.pk/

    ReplyDelete
  110. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant clinic pakistan

    ReplyDelete
  111. "I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Murree

    ReplyDelete
  112. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant clinic pakistan

    ReplyDelete
  113. """I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant pakistan

    ReplyDelete
  114. This is a nice Site to watch out for and we provided information on
    vidmate make sure you can check it out and keep on visiting our Site.

    ReplyDelete
  115. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant surgeon pakistan

    ReplyDelete
  116. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant in pakistan

    ReplyDelete
  117. "I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Swat

    ReplyDelete
  118. I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Saifal Muluk lake

    ReplyDelete
  119. "I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Skardu

    ReplyDelete
  120. "I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Gilgit

    ReplyDelete
  121. "I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Kashgar

    ReplyDelete
  122. "I loved the post, keep posting interesting posts. I will be a regular reader...

    London SEO Services

    ReplyDelete
  123. I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Kashmir tour

    ReplyDelete

  124. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hair transplant surgeon pakistan

    ReplyDelete
  125. I loved the post, keep posting interesting posts. I will be a regular reader...

    SEO Company London

    ReplyDelete
  126. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.hairclinic.pk/hair-transplant-in-islamabad/

    ReplyDelete
  127. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo expert

    ReplyDelete
  128. "I loved the post, keep posting interesting posts. I will be a regular reader...

    hairclinic.pk

    ReplyDelete
  129. "I loved the post, keep posting interesting posts. I will be a regular reader...

    yourcar.pk

    ReplyDelete
  130. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo master

    ReplyDelete
  131. "I loved the post, keep posting interesting posts. I will be a regular reader...

    rent a car islamabad

    ReplyDelete
  132. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.endconsultant.com/

    ReplyDelete
  133. "I loved the post, keep posting interesting posts. I will be a regular reader...

    rent a car in islamabad

    ReplyDelete
  134. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.hairclinic.pk/hair-transplant-in-islamabad/


    ReplyDelete
  135. "I loved the post, keep posting interesting posts. I will be a regular reader...

    car rental islamabad

    ReplyDelete
  136. "I loved the post, keep posting interesting posts. I will be a regular reader...

    rent a car islamabad without driver

    ReplyDelete
  137. "I loved the post, keep posting interesting posts. I will be a regular reader...

    https://www.seomagician.co.uk"

    ReplyDelete
  138. "I loved the post, keep posting interesting posts. I will be a regular reader...

    SeoMagician.co.uk

    ReplyDelete
  139. "I loved the post, keep posting interesting posts. I will be a regular reader...

    seomagician.co.uk

    ReplyDelete
  140. "I loved the post, keep posting interesting posts. I will be a regular reader...

    Rent a car from Islamabad to Naran Kaghan

    ReplyDelete
  141. "I loved the post, keep posting interesting posts. I will be a regular reader...

    without driver car rental islamabad

    ReplyDelete
  142. "I loved the post, keep posting interesting posts. I will be a regular reader...

    car rental islamabad

    ReplyDelete
  143. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo expert in pakistan

    ReplyDelete
  144. outsourcingall.com "Usually I never comment on blogs but your article is so convincing that I never stop myself to say something about it.
    This paragraph gives clear idea for the new viewers of blogging, Thanks you. You’re doing a great job Man, Keep it up.
    outsourcing training

    ReplyDelete
  145. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo experts pakistan

    ReplyDelete
  146. Great Post! Really enjoyed reading it, thank you for taking the time to share this. You should also try to go Fishing in Dubai with Go fishing Dubai , they are organising fishing trips in dubai

    ReplyDelete
  147. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo consultant pakistan

    ReplyDelete
  148. I loved the post, keep posting interesting posts. I will be a regular reader


    https://talkwithstranger.com/

    ReplyDelete
  149. Pretty nice post. I just stumbled upon your weblog and wanted to say that I have really enjoyed browsing your blog posts. After all, I’ll be subscribing to your feed and I hope you write again soon!

    Sunglasses price in Pakistan

    ReplyDelete
  150. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo guru pakistan

    ReplyDelete
  151. Thanks for sharing this information. In my opinion, JDK8 counter is winner in this case, i would say best performance is when there is no contention.
    Pls Xpectations

    ReplyDelete
  152. Really it is a very nice topic and Very significant Information for us, I have think the representation of this Information is actually super one. . new metro city saraialamgir loction

    ReplyDelete
  153. Really it is a very nice topic and Very significant Information for us, I have think the representation of this Information is actually super one. . SEO Services Monthly

    ReplyDelete
  154. Thanks alot for sharing. Did you hear FREE TACO? Or $500 Prizes? Yes. That’s not in your dream. Taco bell is a renowned Fast-food restaurant who is giving rewards to its loyal customers. Their famous foods include tacos, while other featuring items are nachos, burritos and many other specialty items. It is helping you to take a survey in which customer give reviews to company. After completing this survey, anyone can win the prizes.

    In Tell the bell Survey, we will guide you about how to take taco bell customer satisfaction survey within 5 Minutes. Also we will provide you all the important trick and tips to Win Taco Bell Survey. Stay with us and read the post below for all the Details about survey.tell the bell survey

    ReplyDelete
  155. I loved the post, keep posting interesting posts. I will be a regular reader...

    seo expert pakistan

    ReplyDelete