1 |
< |
page_stat_t *get_page_stats(); |
2 |
< |
page_stat_t *get_page_stats_diff(); |
1 |
> |
Page Statistics |
2 |
> |
=============== |
3 |
|
|
4 |
+ |
$Id$ |
5 |
+ |
|
6 |
+ |
Data Structure |
7 |
+ |
-------------- |
8 |
+ |
|
9 |
|
typedef struct{ |
10 |
|
long long pages_pagein; |
11 |
|
long long pages_pageout; |
12 |
|
time_t systime; |
13 |
|
}page_stat_t; |
14 |
|
|
15 |
< |
pages_pagein is the number of pages swapped into memory |
16 |
< |
pages_pageout is the number of pages swapped from memory to swap |
15 |
> |
pages_pagein is the number of pages swapped in to memory |
16 |
> |
pages_pageout is the number of pages swapped out of memory (to swap) |
17 |
|
|
18 |
< |
get_page_stats() and get_page_stats_diff() both |
19 |
< |
return a pointer to a static buffer of type page_stat_t |
18 |
> |
Functions |
19 |
> |
--------- |
20 |
|
|
21 |
< |
get_page_stats() will return the number of pages the system |
22 |
< |
has paged in and out since bootup. get_page_stats_diff() |
18 |
< |
will return the difference since last time it was called. |
19 |
< |
If it has not been called before, it will return get_page_stats() |
21 |
> |
page_stat_t *get_page_stats(); |
22 |
> |
page_stat_t *get_page_stats_diff(); |
23 |
|
|
24 |
< |
BUGS |
24 |
> |
get_page_stats() and get_page_stats_diff() both return a pointer |
25 |
> |
to a static buffer of type page_stat_t. |
26 |
> |
|
27 |
> |
get_page_stats() will return the number of pages the system has |
28 |
> |
paged in and out since bootup. get_page_stats_diff() will return |
29 |
> |
the difference since last time it was called. If it has not been |
30 |
> |
called before, it will return get_page_stats(). |
31 |
> |
|
32 |
> |
Bugs |
33 |
> |
---- |
34 |
> |
|
35 |
|
Solaris doesn't seem to report accurately. It reports the number |
36 |
< |
of pages swapped into memory, not necessarily from swap. This |
37 |
< |
feature isn't deamed entirely reliable :) |
36 |
> |
of pages swapped into memory, not necessarily from swap. This feature |
37 |
> |
isn't deemed entirely reliable :) |
38 |
> |
|
39 |
> |
Example |
40 |
> |
------- |
41 |
> |
|
42 |
> |
An example can be found in examples/page_stats.c |