more about multithreading
Jul. 31st, 2008 03:26 pm![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png){kind=small}
109в продолжение к предыдущему посту.
article describes number of techniques for avoiding locking overhead. The first, and by far the most important, technique eliminates locks on reads. The second technique builds on the first in a trivial way by using spin locks instead of normal locks for the write accesses. The third technique also builds on the first technique but removes the locks on writes altogether by using CompareExchange instructions to directly update the data structures. Finally, the last technique builds on the first technique and takes advantage of the fact that lazy initialization has unique robustness to concurrent updates to remove all interlocked operations.
x-posted
article describes number of techniques for avoiding locking overhead. The first, and by far the most important, technique eliminates locks on reads. The second technique builds on the first in a trivial way by using spin locks instead of normal locks for the write accesses. The third technique also builds on the first technique but removes the locks on writes altogether by using CompareExchange instructions to directly update the data structures. Finally, the last technique builds on the first technique and takes advantage of the fact that lazy initialization has unique robustness to concurrent updates to remove all interlocked operations.
x-posted