https://github.com/pgaref/jni_thread_pinning

https://github.com/pgaref/jni_thread_pinning

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/pgaref/jni_thread_pinning
• Owner: pgaref
• Created: 2016-03-14T16:26:02.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-04-02T23:07:50.000Z (about 10 years ago)
• Last Synced: 2025-01-08T06:35:45.332Z (over 1 year ago)
• Language: Java
• Size: 7.14 MB
• Stars: 0
• Watchers: 3
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

          
# jni_thread_pinning

 /proc/cpuinfo file contains info about the machine cpu architecture:

* Chip: The physical processor you can hold in your hands. Some people call it socket but it can generate confusion with network programming. Different chips usually share the same L3 cache.

* Core: A chip can have multiple cores (multi-core processor). Each core usually has its own L1 cache, which is the fastest in-chip cache. Different cores usually share the same L2 cache.

* Processor: A *logical* processor which is the smallest processing unit that can execute only one thread at a time. If the chip supports hyper-threading, then each core will have two logical processors. Otherwise each core will only be able to execute one thread through a single logical processor.

## Experimental results

Run on CPU:  Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz with

* 4 physical cores

* 4 Hyper Threads

* 8 usable processors in total

### Small tasks

![Thead Affinity Small Tasks](https://github.com/pgaref/jni_thread_pinning/blob/master/graphs/thread-affinity-sTasks.jpg)

### Medium tasks

![Thead Affinity Medium Tasks](https://github.com/pgaref/jni_thread_pinning/blob/master/graphs/thread-affinity-mTasks.jpg)

### Large tasks

![Thead Affinity Large Tasks](https://github.com/pgaref/jni_thread_pinning/blob/master/graphs/thread-affinity-lTasks.jpg)

## References

* [Reducing system jitter-part1](http://epickrram.blogspot.co.uk/2015/09/reducing-system-jitter.html)

* [Reducing system jitter-part2](http://epickrram.blogspot.co.uk/2015/11/reducing-system-jitter-part-2.html)

* [HdrHistogram + jHiccup](http://psy-lob-saw.blogspot.com/2015/02/hdrhistogram-better-latency-capture.html)