atomic_开发者

Atomic GETSET on a hash in Redis

I\'m going to be storing a hit counter for a number of URLs in Redis. I\'m planning on using a hash because that seems to make sense. It also has an atomic increment function which is critical to my u[详细]

2023-04-12 06:13 分类：问答

Atomic operations on Shared Memory in CUDA

I use a GTX 280, which has compute capability 1.3 and supports atomic operations on shared memory. I am using cuda SDK 2.2 and VS 2005. In my program I have to extensively use atomic operations becaus[详细]

2023-04-11 17:13 分类：问答

InterlockedExchange and memory visibility

I have read the article Synchronization and Multiprocessor Issuesand I have a question about InterlockedCompareExchange and InterlockedExchange. The question is actually about the last example in the[详细]

2023-04-11 15:31 分类：问答

How does transactions (in MySQL for me) behaves when are ran concurrently?

Here is my scenario: I have table A, that has 4 rows (id, col1, col2, col3) with a UNIQUE index put on the last 3 rows (id is primary key). Lets suppose there are 2 users: user Foo and user Bar.[详细]

2023-04-11 08:22 分类：问答

SSE instructions: which CPUs can do atomic 16B memory operations?

Consider a single memory access (a single read or a single write, not read+write) SSE instruction on an x86 CPU. The instruction is accessing 16 bytes (128 bits) of memory and the accessed memory loca[详细]

2023-04-11 03:05 分类：问答

How to do atomic file replacement?

What\'s the recommended way to replace a file atomically in Python? i.e. if the Python script is interrupted, there is a power outage etc. files 开发者_运维技巧do not have a high probability of ending[详细]

2023-04-11 02:50 分类：问答

Setting Up SVN for Atomic Commits and Restricted Access

We\'re having a discussion at work currently and I was looking for some advice on SVN setup. Our pattern is that we have a variety of projects checked into SVN, some of these projects depend on other[详细]

2023-04-09 10:07 分类：问答

How to implement a concurrent circular ticker (counter) in Java?

I want to implement a circular counter in Java. The counter on each request should increment (atomically) and on reaching an upper limit should roll over to 0.[详细]

2023-04-07 19:48 分类：问答

AtomicXXX.lazySet(...) in terms of happens before edges

What does mean AtomicXXX.lazySet(value) method in terms of happens-before edges, used in most of JMM reasoning? The javadocs is pure on it, and Sun bug 6275329 states:[详细]

2023-04-07 09:59 分类：问答