A Multithreaded, Transaction-Based Locking Strategy for Containers Bob Steagall CppCon 2020 K E W B C O M P U T I N GCopyright © 2020 Bob Steagall K E W B C O M P U T I N G Overview • Sharing a container

References Persistence ▶ Goal: Add persistence to concurrent data structures ▶ Leverage existing multithreaded synchronization guarantees A Persistent Hash Map for Graph Processing Workloads and a Methodology References Persistence ▶ Goal: Add persistence to concurrent data structures ▶ Leverage existing multithreaded synchronization guarantees ▶ Naive idea: flush-on-read [15] ▶ Flush newly created objects (ex References Persistence ▶ Goal: Add persistence to concurrent data structures ▶ Leverage existing multithreaded synchronization guarantees ▶ Naive idea: flush-on-read [15] ▶ Flush newly created objects (ex

Threading M application threads -> N hardware threads The same distinctions can be done at a multithreaded language or multithreading runtime level. The problem 8 How to schedule M tasks on N hardware on cactus stacks / segmented stacks https://github.com/mratsim/weave/blob/v0.3.0/weave/memory/multithreaded_ memory_management.md - Plagued Go and Rust (abandoned) - Decades of research including OS kernel

min/max (P0493)Atomic min/max motivation (P0493) Long history - almost as old as atomic addition Multithreaded applications often involve scenarios where multiple threads need to concurrently update a shared updates to shared variables, facilitating the development of high-performance and scalable multithreaded applications. ● By understanding the semantics and proper usage of atomic min/max, you can

some platform-specific library, such as pthreads. But then what could the Standard say about multithreaded programs? 4 Thread A int x = 0; start_thread_b(); x = 1; Thread B while (x != 1) {} Will gives us “counting” primitives like semaphore and latch ● But if your program is fundamentally multithreaded, look for higher-level facilities: promise/future, coroutines, ASIO, TBB 51Questions? followed

will leave this session being able to use threads, locks, and start thinking about architecting multithreaded software. All materials and code samples will also be posted online. 4 The abstract that you https://software.intel.com/en-us/article s/performance-methods-and-practices -of-directx-11-multithreaded-rendering ● Pretty much everywhere in machine learning... ● Pretty much everywhere you need

index_interval 73 memtable_flush_queue_size 73 memtable_flush_writers 73 memtable_total_space_in_mb 73 multithreaded_compaction 73 reduce_cache_capacity_to 73 reduce_cache_sizes_at 73 sliced_buffer_size_in_kb commitlog_total_space_in_mb 4096 (replaces column family storage property memtable_flush_after_mins) multithreaded_compaction false memtable_total_space_in_mb 1/3 of heap (replaces column family storage properties 4 memtable_flush_writers One per data directory memtable_total_space_in_mb 1/3 of the heap multithreaded_compaction false partitioner org.apache.cassandra.dht.RandomPartitioner phi_convict_threshold

runtime 函数库于1970s 年代产生出来时，PC 的内存容量还很小，多任务是 个新奇观念，更别提什么多执行线程了。因此以当时产品为基础所演化的C runtime 函 数库在多线程（multithreaded）的表现上有严重问题，无法被多线程程序使用。 利用各种同步机制（synchronous mechanism）如critical section、mutex、semaphore、 eve libc.lib 898,826 Multithreaded（static） libcmt.lib 951,142 Multithreaded DLL msvcrt.lib 5,510,000 Debug Single-Threaded（static） libcd.lib 2,374,542 Debug Multithreaded（static）libcmtd.lib 2 949,190 Debug Multithreaded DLL msvcrtd.lib 803,418 Visual C++ 编译器提供下列选项，让我们决定使用哪一个C runtime 函数库： /ML Single-Threaded（static） /MT Multithreaded（static） /MD Multithreaded DLL（dynamic import

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 547 3 Final Project: Building a Multithreaded Web Server 551 3.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 553 3.2 single-threaded scenarios; the next chapter on concurrency will cover how to do reference counting in multithreaded programs. If you try to use Rc with multiple threads, you’ll get a compile-time error. Using functionality of RefCell in a multithreaded program in the next chapter on concurrency. For now, all you need to know is that if you try to use RefCell in a multithreaded context, you’ll get a compile

being ahead in tech? Madness! 44Redesigning for multithread ◉ Switching to DX11 allows for multithreaded texture and model loaded ◉ Loading algorithms needed to be rewritten ◉ 2D and 3D asset loading