Are ring buffers thread safe?
RingBufferLock is a fixed size ring buffer and stores the data object by value avoiding calls to Malloc. This container is similar to RingBuffer but uses locks to make it thread safe.
What is the difference between circular queue and circular buffer?
A queue is an abstract data type supporting the operations enqueue and dequeue. A ring buffer is one possible implementation of a queue, though it’s not the only one (for example, you could implement a queue using a linked list).
What is RX ring size?
The default RX Ring size is 256 (the maximum is 4096). User can increase this with the ethtool -G command.
What is purpose of TX ring and TX queue on Cisco routers?
The TX Ring’s objective is to drive the link utilization to 100 percent when packets are waiting to exit an interface. The TX Queue holds outgoing packets so that the interface does not have to rely on the general-purpose processor in the router in order to start sending the next packet.
What is RX buffer size?
The RX ring buffer size can be examined with the ethtool -g command. The default RX Ring size is 256 (the maximum is 4096). User can increase this with the ethtool -G command.
What is the TX ring limit?
Overview. The default value of tx-ring-limit is a good compromise between the latency/jitter requirements of medium speed links and increased CPU utilization due to I/O interrupts caused by low tx-ring-limit values. On low-speed links (128 kbps and below), the tx-ring-limit should be decreased to 1.
What is a ring buffer?
The ring buffer is a circular software queue. This queue has a first-in-first-out (FIFO) data characteristic. These buffers are quite common and are found in many embedded systems. Usually, most developers write these constructs from scratch on an as-needed basis.
How do circular buffers work?
Circular buffers (also known as ring buffers) are fixed-size buffers that work as if the memory is contiguous & circular in nature. As memory is generated and consumed, data does not need to be reshuffled – rather, the head/tail pointers are adjusted. When data is added, the head pointer advances. When data is consumed, the tail pointer advances.
What is a circular buffer data structure?
Due to the resource constrained nature of embedded systems, circular buffer data structures can be found in most projects. Circular buffers (also known as ring buffers) are fixed-size buffers that work as if the memory is contiguous & circular in nature.
How do you extend a circular buffer?
C circular buffer library If you are looking to extend this library, a useful exercise is to add additional APIs to enable users to add/remove multiple elements with a single operation. You can also make the C implementation thread-safe. One approach for thread-safety without a mutex is the “lookahead” method.