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Information for build atomic-queue-1.6.3-1.fc40

ID302617
Package Nameatomic-queue
Version1.6.3
Release1.fc40
Epoch
SummaryC++ lockless queue
DescriptionC++14 multiple-producer-multiple-consumer lockless queues based on circular buffer with std::atomic. It has been developed, tested and benchmarked on Linux, but should support any C++14 platforms which implement std::atomic. The main design principle these queues follow is minimalism: the bare minimum of atomic operations, fixed size buffer, value semantics. These qualities are also limitations: • The maximum queue size must be set at compile time or construction time. The circular buffer side-steps the memory reclamation problem inherent in linked-list based queues for the price of fixed buffer size. See Effective memory reclamation for lock-free data structures in C++ for more details. Fixed buffer size may not be that much of a limitation, since once the queue gets larger than the maximum expected size that indicates a problem that elements aren’t processed fast enough, and if the queue keeps growing it may eventually consume all available memory which may affect the entire system, rather than the problematic process only. The only apparent inconvenience is that one has to do an upfront back-of-the-envelope calculation on what would be the largest expected/acceptable queue size. • There are no OS-blocking push/pop functions. This queue is designed for ultra-low-latency scenarios and using an OS blocking primitive would be sacrificing push-to-pop latency. For lowest possible latency one cannot afford blocking in the OS kernel because the wake-up latency of a blocked thread is about 1-3 microseconds, whereas this queue’s round-trip time can be as low as 150 nanoseconds. Ultra-low-latency applications need just that and nothing more. The minimalism pays off, see the throughput and latency benchmarks. Available containers are: • AtomicQueue - a fixed size ring-buffer for atomic elements. • OptimistAtomicQueue - a faster fixed size ring-buffer for atomic elements which busy-waits when empty or full. • AtomicQueue2 - a fixed size ring-buffer for non-atomic elements. • OptimistAtomicQueue2 - a faster fixed size ring-buffer for non-atomic elements which busy-waits when empty or full. These containers have corresponding AtomicQueueB, OptimistAtomicQueueB, AtomicQueueB2, OptimistAtomicQueueB2 versions where the buffer size is specified as an argument to the constructor. Totally ordered mode is supported. In this mode consumers receive messages in the same FIFO order the messages were posted. This mode is supported for push and pop functions, but for not the try_ versions. On Intel x86 the totally ordered mode has 0 cost, as of 2019. Single-producer-single-consumer mode is supported. In this mode, no read-modify-write instructions are necessary, only the atomic loads and stores. That improves queue throughput significantly. Move-only queue element types are fully supported. For example, a queue of std::unique_ptr<T> elements would be AtomicQueue2B<std::unique_ptr<T>> or AtomicQueue2<std::unique_ptr<T>, CAPACITY>.
Built bydavidlt
State complete
Volume DEFAULT
StartedWed, 27 Mar 2024 18:26:39 UTC
CompletedWed, 27 Mar 2024 18:26:39 UTC
Tags
f40
RPMs
src
atomic-queue-1.6.3-1.fc40.src.rpm (info) (download)
noarch
atomic-queue-devel-1.6.3-1.fc40.noarch.rpm (info) (download)
Changelog * Mon Mar 04 2024 Benjamin A. Beasley <code@musicinmybrain.net> - 1.6.3-1 - Update to 1.6.3: Fixes C++20 compile errors * Mon Mar 04 2024 Benjamin A. Beasley <code@musicinmybrain.net> - 1.6.2-1 - Update to 1.6.2 * Wed Feb 14 2024 Benjamin A. Beasley <code@musicinmybrain.net> - 1.6.1-1 - [packit] 1.6.1 upstream release * Mon Jan 22 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.5-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild * Fri Jan 19 2024 Fedora Release Engineering <releng@fedoraproject.org> - 1.5-2 - Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild * Thu Nov 16 2023 Benjamin A. Beasley <code@musicinmybrain.net> - 1.5-1 - Update to 1.5 (close RHBZ#2249919) * Wed Jul 19 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.4-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild * Sun Apr 02 2023 Benjamin A. Beasley <code@musicinmybrain.net> - 1.4-1 - Update to 1.4 (close RHBZ#2183486) * Sat Feb 25 2023 Benjamin A. Beasley <code@musicinmybrain.net> - 1.1-1 - Update to 1.1 (close RHBZ#2173288) * Wed Jan 18 2023 Fedora Release Engineering <releng@fedoraproject.org> - 1.0-9 - Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild * Mon Dec 19 2022 Benjamin A. Beasley <code@musicinmybrain.net> - 1.0-8 - Indicate dirs. in files list with trailing slashes * Mon Dec 19 2022 Benjamin A. Beasley <code@musicinmybrain.net> - 1.0-7 - Leaf package: remove i686 support * Sun Jul 31 2022 Benjamin A. Beasley <code@musicinmybrain.net> - 1.0-6 - Confirm that License is SPDX MIT (no License field change) * Wed Jul 20 2022 Fedora Release Engineering <releng@fedoraproject.org> - 1.0-5 - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild