projects / apple / xnu.git / blame
| Commit | Line | Data |
|---|---|---|
| 13fec989 A |
1 | <h2>vm_statistics</h2> |
| 2 | <hr> | |
| 3 | <p> | |
| 4 | <strong>Structure</strong> - Defines statistics for the kernel's use of virtual memory. | |
| 5 | <h3>SYNOPSIS</h3> | |
| 6 | <pre> | |
| 7 | <strong>struct vm_statistics</strong> | |
| 8 | <strong>{</strong> | |
| 9 | <strong>integer_t</strong> <var>free_count</var><strong>;</strong> | |
| 10 | <strong>integer_t</strong> <var>active_count</var><strong>;</strong> | |
| 11 | <strong>integer_t</strong> <var>inactive_count</var><strong>;</strong> | |
| 12 | <strong>integer_t</strong> <var>wire_count</var><strong>;</strong> | |
| 13 | <strong>integer_t</strong> <var>zero_fill_count</var><strong>;</strong> | |
| 14 | <strong>integer_t</strong> <var>reactivations</var><strong>;</strong> | |
| 15 | <strong>integer_t</strong> <var>pageins</var><strong>;</strong> | |
| 16 | <strong>integer_t</strong> <var>pageouts</var><strong>;</strong> | |
| 17 | <strong>integer_t</strong> <var>faults</var><strong>;</strong> | |
| 18 | <strong>integer_t</strong> <var>cow_faults</var><strong>;</strong> | |
| 19 | <strong>integer_t</strong> <var>lookups</var><strong>;</strong> | |
| 20 | <strong>integer_t</strong> <var>hits</var><strong>;</strong> | |
| 21 | <strong>};</strong> | |
| 22 | ||
| 23 | <strong>typedef struct vm_statistics* vm_statistics_t;</strong> | |
| 24 | </pre> | |
| 25 | <h3>FIELDS</h3> | |
| 26 | <dl> | |
| 27 | <dt> <var>free_count</var> | |
| 28 | <dd> | |
| 29 | The total number of free pages in the system. | |
| 30 | <p> | |
| 31 | <dt> <var>active_count</var> | |
| 32 | <dd> | |
| 33 | The total number of pages currently in use and pageable. | |
| 34 | <p> | |
| 35 | <dt> <var>inactive_count</var> | |
| 36 | <dd> | |
| 37 | The number of inactive pages. | |
| 38 | <p> | |
| 39 | <dt> <var>wire_count</var> | |
| 40 | <dd> | |
| 41 | The number of pages that are wired in memory and cannot be paged | |
| 42 | out. | |
| 43 | <p> | |
| 44 | <dt> <var>zero_fill_count</var> | |
| 45 | <dd> | |
| 46 | The number of zero-fill pages. | |
| 47 | <p> | |
| 48 | <dt> <var>reactivations</var> | |
| 49 | <dd> | |
| 50 | The number of reactivated pages. | |
| 51 | <p> | |
| 52 | <dt> <var>pageins</var> | |
| 53 | <dd> | |
| 54 | The number of requests for pages from a pager (such as the i-node | |
| 55 | pager). | |
| 56 | <p> | |
| 57 | <dt> <var>pageouts</var> | |
| 58 | <dd> | |
| 59 | The number of pages that have been paged out. | |
| 60 | <p> | |
| 61 | <dt> <var>faults</var> | |
| 62 | <dd> | |
| 63 | The number of times the <strong>vm_fault</strong> routine has been called. | |
| 64 | <p> | |
| 65 | <dt> <var>cow_faults</var> | |
| 66 | <dd> | |
| 67 | The number of copy-on-write faults. | |
| 68 | <p> | |
| 69 | <dt> <var>lookups</var> | |
| 70 | <dd> | |
| 71 | The number of object cache lookups. | |
| 72 | <p> | |
| 73 | <dt> <var>hits</var> | |
| 74 | <dd> | |
| 75 | The number of object cache hits. | |
| 76 | </dl> | |
| 77 | <h3>DESCRIPTION</h3> | |
| 78 | <p> | |
| 79 | The <strong>vm_statistics</strong> structure defines the statistics | |
| 80 | available on the kernel's use of | |
| 81 | virtual memory. The statistics record virtual memory usage since | |
| 82 | the kernel was booted. | |
| 83 | <p> | |
| 84 | For related information for a specific task, see the <strong>task_basic_info</strong> | |
| 85 | structure. | |
| 86 | <h3>NOTES</h3> | |
| 87 | <p> | |
| 88 | This structure is machine word length specific because of the memory sizes | |
| 89 | returned. | |
| 90 | <h3>RELATED INFORMATION</h3> | |
| 91 | <p> | |
| 92 | Functions: | |
| 93 | <a href="task_info.html"><strong>task_info</strong></a>, | |
| 94 | <a href="host_page_size.html"><strong>host_page_size</strong></a>. | |
| 95 | <p> | |
| 96 | Data Structures: | |
| 97 | <a href="task_basic_info.html"><strong>task_basic_info</strong></a>. | |
| 98 |