lockfree
Disruptor
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lockfree | Disruptor | |
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11 | 30 | |
695 | 17,020 | |
- | 0.9% | |
7.9 | 5.4 | |
20 days ago | 4 months ago | |
C++ | Java | |
MIT License | Apache License 2.0 |
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lockfree
- A lock-free ring-buffer with contiguous reservations (2019)
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Atomics and Concurrency
If you're interested about lock-free data structures, I wrote [lockfree](https://github.com/DNedic/lockfree) a collection of lock-free data structures meant to be readable and both hosted system and embedded friendly.
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Optimizing a Ring Buffer for Throughput
If you want more than a spsc queue, I've written `lockfree`, a collection of SPSC and MPMC data structures along the same principles the author here used:https://github.com/DNedic/lockfree.
The library is written in standard C++11 (but additional API's for higher C++ versions have been added), uses no dynamic allocation and is configurable so it is both big metal and deeply embedded friendly.
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A collection of lock-free data structures written in standard C++11
- A lot of code won't work for types with no default constructors, but that is at least compile error
- Using memcpy[0] for arbitrary types is just wrong, see [1]
[0] https://github.com/DNedic/lockfree/blob/main/lockfree/inc/bi...
[1] https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p11...
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Lock-free data structures
My friend wrote a few lock-free data structures and he is now looking for some feedback. Here is the link: https://github.com/DNedic/lockfree
- A collection of lock-free data structures written in standard c++11
- A collection of embedded friendly lock-free data structures written in standard C++11
Disruptor
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Gnet is the fastest networking framework in Go
https://lmax-exchange.github.io/disruptor/#_what_is_the_disr.... Unfortunately IIUC writing this in Go still prevents the spin-locked acceptor thread from achieving the kind of performance you could get in a non-GC language, unless you chose to disable GC, so I'd guess Envoy is still faster.
https://gnet.host/docs/quickstart/ it's nice that you can use this simply though. Envoy is kind of tricky to setup with custom filters, so most of the time it's just a standalone binary.
[0] https://blog.envoyproxy.io/envoy-threading-model-a8d44b92231...
[1] https://lmax-exchange.github.io/disruptor/#_what_is_the_disr...
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A lock-free ring-buffer with contiguous reservations (2019)
See also the Java LMAX Disruptor https://github.com/LMAX-Exchange/disruptor
I've built a similar lock-free ring buffer in C++11 https://github.com/posterior/loom/blob/master/doc/adapting.m...
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JEP Draft: Deprecate Memory-Access Methods in Sun.misc.Unsafe for Removal
"Why we chose Java for our High-Frequency Trading application"
https://medium.com/@jadsarmo/why-we-chose-java-for-our-high-...
LMAX Disruptor customers
https://lmax-exchange.github.io/disruptor/
Among many other examples.
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LMAX Disruptor – High Performance Inter-Thread Messaging Library
Current documentation
https://lmax-exchange.github.io/disruptor/
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Progress on No-GIL CPython
LMAX Disruptor has on their wiki that average latency to send a message from one thread to another at 53 nanoseconds. For comparison a mutex is like 25 nanoseconds and more if Contended but a mutex is point to point synchronization.
The great thing about it is that multiple threads can receive the same message without much more effort.
https://github.com/LMAX-Exchange/disruptor/wiki/Performance-...
https://gist.github.com/rmacy/2879257
I am dreaming of language that is similar to Smalltalk that stays single threaded until it makes sense to parallise.
I am looking for problems to parallelism that are not big data. Parallelism is like adding more cars to the road rather than increasing the speed of the car. But what does a desktop or mobile user need to do locally that could take advantage of the mathematical power of a computer? I'm still searching.
- Disruptor 4.0.0 Released
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Anything can be a message queue if you use it wrongly enough
Database config should be two connection strings, 1 for the admin user that creates the tables and anther for the queue user. Everything else should be stored in the database itself. Each queue should be in its own set of tables. Large blobs may or may not be referenced to an external file.
Shouldn't a message send be worst case a CAS. It really seems like all the work around garbage collection would have some use for in-memory high speed queues.
Are you familiar with the LMAX Disruptor? Is is a Java based cross thread messaging library used for day trading applications.
https://lmax-exchange.github.io/disruptor/
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Any library you would like to recommend to others as it helps you a lot? For me, mapstruct is one of them. Hopefully I would hear some other nice libraries I never try.
Disruptor for inter-thread messaging
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Measuring how much Rust's bounds checking actually costs
I have never worked in any industries where a perf margin was that small. It is funny, in HFT there are folks using Lmax (Java) and then you have folks writing their own TCP/IP stacks on FPGAs to do trading.
What are some alternatives?
rc_event_queue - VecDeque-like fast, unbounded, mpmc/spmc concurent FIFO message queue. Lockless reads, write-lock writes.
JCTools
distortos - object-oriented C++ RTOS for microcontrollers
Agrona - High Performance data structures and utility methods for Java
glibc - GNU Libc
fastutil - fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues.
micro-gl - Headers Only C++11 CPU Vector Graphics. no std-lib, no FPU and no GPU required !
MPMCQueue.h - A bounded multi-producer multi-consumer concurrent queue written in C++11
tlaplus - TLC is a model checker for specifications written in TLA+. The TLA+Toolbox is an IDE for TLA+.
Eclipse Collections - Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.
Ring-Buffer - A simple ring buffer (circular buffer) designed for embedded systems.
Javolution