| 142 |
|
* that using very small constants in the range of 1-3 work best |
| 143 |
|
* over a range of platforms. Larger values introduce increasing |
| 144 |
|
* costs of cache misses and risks of long traversal chains, while |
| 145 |
< |
* smaller values increase CAS contentiona and overhead. |
| 145 |
> |
* smaller values increase CAS contention and overhead. |
| 146 |
|
* |
| 147 |
|
* Dual queues with slack differ from plain M&S dual queues by |
| 148 |
|
* virtue of only sometimes updating head or tail pointers when |
| 252 |
|
* efficient explicit control paths instead of letting JVMs insert |
| 253 |
|
* implicit NullPointerExceptions when they are null. While not |
| 254 |
|
* currently fully implemented, we also leave open the possibility |
| 255 |
< |
* of re-nulling these fields when empty (which is is complicated |
| 256 |
< |
* to arrange, for little benefit.) |
| 255 |
> |
* of re-nulling these fields when empty (which is complicated to |
| 256 |
> |
* arrange, for little benefit.) |
| 257 |
|
* |
| 258 |
|
* All enqueue/dequeue operations are handled by the single method |
| 259 |
|
* "xfer" with parameters indicating whether to act as some form |
