这样,Seastar对分配给自己的物理内存也进行了分片(shard),每个core有自己的内存空间,有自己的memory allocator(log-structured)对内存区域进行分配和释放管理,无需考虑thread safe和内存碎片化(定期compact,移动object,合并memory holes)。下图对比了基于JVM和Seastar的内存管理: 网络shard 所有的网络连接在cores之间分片(...
{ uint64_t birth; nty_cpu_ctx ctx; struct _nty_coroutine *curr_thread; int page_size; int poller_fd; int eventfd; struct epoll_event eventlist[NTY_CO_MAX_EVENTS]; int nevents; int num_new_events; nty_coroutine_queue ready; nty_coroutine_rbtree_sleep sleeping; nty_coroutine_rbtree_...
The queue can take advantage of extra per-producer and per-consumer storage if it's available to speed up its operations. This takes the form of 'tokens': You can create a consumer token and/or a producer token for each thread or task (tokens themselves are not thread-safe), and use ...
~COutputQueue EndFlush EOS FreeSamples InitialThreadProc IsIdle IsQueued IsSpecialSample NewSegment NotifyThread QueueSample Receive ReceiveMultiple Reset SendAnyway SetPopEvent ThreadProc CPersistStream CPosPassThru CPullPin CQueue CRefTime CRenderedInputPin ...
该类是对AbstractEventExecutor的一个进一步实现,其实现了周期任务的执行。原理是内部持有一个优先队列ScheduledFutureTask。所有周期任务都添加到这个队列中,也实现了取出周期任务的方法,但是该抽象类并没有具体执行周期任务的实现。 3.3 SingleThreadEventExecutor ...
2.6 Event 2.7 条件Condition(了解) 2.8 定时器 2.9 线程queue 2.10 Python标准模块--concurrent.futures 三 补充:paramiko模块 四 协程 五Greenlet 六Gevent 6.1 Gevent之同步与异步 6.2 Gevent之应用举例一 6.3 Gevent之应用举例二 七 模块补充 八 作业 ...
About QP/C === QP/C is an event-driven, RTOS-like, active object framework for microcontrollers. The QP/C framework provides thread-safe execution of active objects (concurrent state machines) and supports both manual and automatic coding of UML statecharts in readable, production-quality ANSI-...
EFK可能都不熟悉,实际上EFK是大名鼎鼎的日志系统ELK的一个变种。 在没有分布式日志的时候,每次出问题了需要查询日志的时候,需要登录到Linux服务器,使用命令cat -n xxxx|grep xxxx 搜索出日志在哪一行,然后cat -n xxx|tail -n +n行|head -n 显示多少行,这样不仅效率低下,而且对于程序异常也不方便查询,日志少...
Threadly - Type-safe thread-local storage in Swift Flow-iOS - Make your logic flow and data flow clean and human readable Queuer - A queue manager, built on top of OperationQueue and Dispatch (aka GCD). SwiftQueue - Job Scheduler with Concurrent run, failure/retry, persistence, repeat, ...
Threadly - Type-safe thread-local storage in Swift Flow-iOS - Make your logic flow and data flow clean and human readable Queuer - A queue manager, built on top of OperationQueue and Dispatch (aka GCD). SwiftQueue - Job Scheduler with Concurrent run, failure/retry, persistence, repeat, ...