Changes for page Concurrency

Last modified by chrisby on 2024/06/02 15:15

From version 1.9
edited by chrisby
on 2023/11/26 21:02
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To version 1.11
edited by chrisby
on 2023/11/27 21:00
Change comment: There is no comment for this version

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53 53   * Locks: Mechanisms to ensure that only one thread can access a resource at a time.
54 54   * Atomic Operations: Operations that are completed in a single step relative to other threads.
55 55   * Thread Safety
56 + * Race Conditions
57 + * Statelessness, Statefulness
58 + * Functional Programming
59 + * Cloning Data to avoid side effects
60 + * Side effects
56 56   * Producer-consumer
57 57   * Reader-recorder vs Reader Writer??
58 58   * Philosopher problem → Study algorithms and their application in solutions.
59 59  
65 +A few more suggestions from ChatGPT:
66 +
67 + Learning about concurrency algorithms and common concurrency problems is a great way to deepen your understanding of concurrent programming. Here's a list of key algorithms and problems, along with their typical solutions:
68 + Concurrency Algorithms:
69 +
70 + Producer-Consumer:
71 + Problem: How to handle scenarios where one or more threads (producers) are producing data and one or more threads (consumers) are consuming it.
72 + Solution: Use buffers, queues, semaphores, or condition variables to synchronize producers and consumers.
73 +
74 + Readers-Writers:
75 + Problem: How to manage access to a shared resource where some threads (readers) only read data, and others (writers) write data.
76 + Solution: Implement mechanisms to ensure that multiple readers can access the resource simultaneously, but writers have exclusive access.
77 +
78 + Dining Philosophers:
79 + Problem: A classic synchronization problem dealing with resource allocation and avoiding deadlocks.
80 + Solution: Strategies include resource hierarchy, arbitrator, or limiting the number of philosophers.
81 +
82 + Barriers:
83 + Problem: Synchronizing a group of threads to wait until they have all reached a certain point in their execution.
84 + Solution: Use barrier constructs that block threads until all have reached the barrier.
85 +
86 + Concurrency Problems and Solutions:
87 +
88 + Deadlocks:
89 + Problem: Occurs when multiple threads or processes are waiting on each other to release resources, and none of them can proceed.
90 + Solution: Deadlock prevention techniques (like resource ordering), deadlock avoidance (like Banker’s algorithm), and deadlock detection and recovery.
91 +
92 + Race Conditions:
93 + Problem: Occurs when the outcome of a program depends on the relative timing of threads or processes.
94 + Solution: Use mutual exclusion (mutexes), atomic operations, or transactional memory to ensure that only one thread can access the shared resource at a time.
95 +
96 + Livelocks:
97 + Problem: Threads or processes are actively performing concurrent operations, but these operations do not progress the state of the program.
98 + Solution: Careful algorithm design to ensure progress and avoid situations where processes continuously yield to each other.
99 +
100 + Starvation:
101 + Problem: A thread or process does not get the necessary resources to proceed, while others continue to be serviced.
102 + Solution: Implement fair locking mechanisms, priority scheduling, or resource allocation strategies that ensure all processes get a chance to proceed.
103 +
104 + Priority Inversion:
105 + Problem: A lower-priority thread holds a resource needed by a higher-priority thread, leading to the higher-priority thread waiting unexpectedly.
106 + Solution: Priority inheritance protocols where the lower-priority thread temporarily inherits the higher priority.
107 +
108 + Thread Interference:
109 + Problem: When multiple threads are accessing and modifying shared data, causing unexpected results.
110 + Solution: Ensure that critical sections of code that access shared resources are protected using synchronization mechanisms like locks.
111 +
60 60  ### Watch out for dependencies between synchronized methods
61 61  
62 62  * Dependencies between synchronized methods in concurrent code cause subtle bugs.