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LMAX aims to be the fastest trading platform in the world. Clearly, in order to achieve this we needed to do something special to achieve very low-latency and high-throughput with our Java platform. Performance testing showed that using queues to pass data between stages of the system was introducing latency, so we focused on optimising this area. The Disruptor is the result of our research and testing. We found that cache misses at the CPU-level, and locks requiring kernel arbitration are both extremely costly, so we created a framework which has "mechanical sympathy" for the hardware it’s running on, and that’s lock-free. This is not a specialist solution, it’s not designed to work only for a financial application. The Disruptor is a general-purpose mechanism for solving a difficult problem in concurrent programming. It works in a different way to more conventional approaches, so you use it a little differently than you might be used to.
Features
- Move data (e.g. messages or events) between threads within the same process
- Multicast events to consumers, with consumer dependency graph
- Pre-allocate memory for events
- Optionally lock-free
- The Disruptor uses Sequences as a means to identify where a particular component is up to
- Intended to be used in cases where you need to independent multiple parallel operations on the same data
- Enables use within a low latency environment
Project Samples
