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1 | <h2>policy_timeshare_info</h2> | |
2 | <hr> | |
3 | <p> | |
4 | <strong>Structure</strong> - Specifies information associated with the system's Timeshare scheduling policy. | |
5 | <h3>SYNOPSIS</h3> | |
6 | <pre> | |
7 | <strong>struct policy_timeshare_limit</strong> | |
8 | <strong>{</strong> | |
9 | <strong>int</strong> <var>max_priority</var><strong>;</strong> | |
10 | <strong>};</strong> | |
11 | ||
12 | <strong>struct policy_timeshare_base</strong> | |
13 | <strong>{</strong> | |
14 | <strong>int</strong> <var>base_priority</var><strong>;</strong> | |
15 | <strong>};</strong> | |
16 | ||
17 | <strong>struct policy_timeshare_info</strong> | |
18 | <strong>{</strong> | |
19 | <strong>int</strong> <var>max_priority</var><strong>;</strong> | |
20 | <strong>int</strong> <var>base_priority</var><strong>;</strong> | |
21 | <strong>int</strong> <var>cur_priority</var><strong>;</strong> | |
22 | <strong>boolean_t</strong> <var>depressed</var><strong>;</strong> | |
23 | <strong>int</strong> <var>depress_priority</var><strong>;</strong> | |
24 | <strong>};</strong> | |
25 | </pre> | |
26 | <h3>FIELDS</h3> | |
27 | <dl> | |
28 | <dt> <var>max_priority</var> | |
29 | <dd> | |
30 | Maximum scheduling priority. | |
31 | <p> | |
32 | <dt> <var>base_priority</var> | |
33 | <dd> | |
34 | Base scheduling priority. | |
35 | <p> | |
36 | <dt> <var>cur_priority</var> | |
37 | <dd> | |
38 | Current scheduling priority. | |
39 | <p> | |
40 | <dt> <var>depressed</var> | |
41 | <dd> | |
42 | True if scheduling priority is depressed. | |
43 | <p> | |
44 | <dt> <var>depress_priority</var> | |
45 | <dd> | |
46 | Scheduling priority from which depressed. | |
47 | </dl> | |
48 | <h3>DESCRIPTION</h3> | |
49 | <p> | |
50 | The <strong>policy_timeshare_info</strong> structure defines the timeshare | |
51 | scheduling policy | |
52 | information. | |
53 | Timeshare threads have three priorities associated with them by the system: | |
54 | <ul> | |
55 | <p> | |
56 | <li> | |
57 | A maximum priority value which can be raised only via privileged operation | |
58 | so that users may not unfairly compete with other users in their processor | |
59 | set. Newly created threads obtain their maximum priority from that of their | |
60 | assigned processor set. | |
61 | <p> | |
62 | <li> | |
63 | A priority value which can be set by the thread to any value up to a | |
64 | maximum priority. Newly created threads obtain their priority from their task. | |
65 | <p> | |
66 | <li> | |
67 | A scheduled priority value which is used to make scheduling decisions for | |
68 | the thread. This value is determined on the basis of the user | |
69 | priority value by | |
70 | the scheduling policy (for time-sharing, this means adding an increment | |
71 | derived from CPU usage). | |
72 | </ul> | |
73 | <h3>RELATED INFORMATION</h3> | |
74 | <p> | |
75 | Functions: | |
76 | <a href="thread_info.html"><strong>thread_info</strong></a>, | |
77 | <a href="task_info.html"><strong>task_info</strong></a>, | |
78 | <a href="processor_set_info.html"><strong>processor_set_info</strong></a>, | |
79 | <a href="P_set_policy_control.html"><strong>processor_set_policy_control</strong></a>, | |
80 | <a href="P_set_policy_disable.html"><strong>processor_set_policy_disable</strong></a>, | |
81 | <a href="P_set_policy_enable.html"><strong>processor_set_policy_enable</strong></a>, | |
82 | <a href="task_policy.html"><strong>task_policy</strong></a>, | |
83 | <a href="thread_policy.html"><strong>thread_policy</strong></a>, | |
84 | <a href="thread_set_policy.html"><strong>thread_set_policy</strong></a>. | |
85 | <p> | |
86 | Data Structures: | |
87 | <a href="policy_fifo_info.html"><strong>policy_fifo_info</strong></a>, | |
88 | <a href="policy_rr_info.html"><strong>policy_rr_info</strong></a>. |