本文详细介绍了不同优先级类别的进程与线程在Windows系统中的优先级级别及其对应的数值表示，包括IDLE、BELOW_NORMAL、NORMAL、ABOVE_NORMAL、HIGH及REALTIME等各类优先级。
| Process priority class | Thread priority level | Base priority | |
|---|---|---|---|
| IDLE_PRIORITY_CLASS | THREAD_PRIORITY_IDLE | 1 | |
| THREAD_PRIORITY_LOWEST | 2 | ||
| THREAD_PRIORITY_BELOW_NORMAL | 3 | ||
| THREAD_PRIORITY_NORMAL | 4 | ||
| THREAD_PRIORITY_ABOVE_NORMAL | 5 | ||
| THREAD_PRIORITY_HIGHEST | 6 | ||
| THREAD_PRIORITY_TIME_CRITICAL | 15 | ||
| BELOW_NORMAL_PRIORITY_CLASS | THREAD_PRIORITY_IDLE | 1 | |
| THREAD_PRIORITY_LOWEST | 4 | ||
| THREAD_PRIORITY_BELOW_NORMAL | 5 | ||
| THREAD_PRIORITY_NORMAL | 6 | ||
| THREAD_PRIORITY_ABOVE_NORMAL | 7 | ||
| THREAD_PRIORITY_HIGHEST | 8 | ||
| THREAD_PRIORITY_TIME_CRITICAL | 15 | ||
| NORMAL_PRIORITY_CLASS | THREAD_PRIORITY_IDLE | 1 | |
| THREAD_PRIORITY_LOWEST | 6 | ||
| THREAD_PRIORITY_BELOW_NORMAL | 7 | ||
| THREAD_PRIORITY_NORMAL | 8 | ||
| THREAD_PRIORITY_ABOVE_NORMAL | 9 | ||
| THREAD_PRIORITY_HIGHEST | 10 | ||
| THREAD_PRIORITY_TIME_CRITICAL | 15 | ||
| ABOVE_NORMAL_PRIORITY_CLASS | THREAD_PRIORITY_IDLE | 1 | |
| THREAD_PRIORITY_LOWEST | 8 | ||
| THREAD_PRIORITY_BELOW_NORMAL | 9 | ||
| THREAD_PRIORITY_NORMAL | 10 | ||
| THREAD_PRIORITY_ABOVE_NORMAL | 11 | ||
| THREAD_PRIORITY_HIGHEST | 12 | ||
| THREAD_PRIORITY_TIME_CRITICAL | 15 | ||
| HIGH_PRIORITY_CLASS | THREAD_PRIORITY_IDLE | 1 | |
| THREAD_PRIORITY_LOWEST | 11 | ||
| THREAD_PRIORITY_BELOW_NORMAL | 12 | ||
| THREAD_PRIORITY_NORMAL | 13 | ||
| THREAD_PRIORITY_ABOVE_NORMAL | 14 | ||
| THREAD_PRIORITY_HIGHEST | 15 | ||
| THREAD_PRIORITY_TIME_CRITICAL | 15 | ||
| REALTIME_PRIORITY_CLASS | THREAD_PRIORITY_IDLE | 16 | |
| THREAD_PRIORITY_LOWEST | 22 | ||
| THREAD_PRIORITY_BELOW_NORMAL | 23 | ||
| THREAD_PRIORITY_NORMAL | 24 | ||
| THREAD_PRIORITY_ABOVE_NORMAL | 25 | ||
| THREAD_PRIORITY_HIGHEST | 26 | ||
| THREAD_PRIORITY_TIME_CRITICAL | 31 | ||
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