My own resolution and summary:
Earlier today I posted:
|>I have some code which is supposed to get swap file usage information, though
|>I am getting some discrepencies (any clues as to why?):
|>
|>code snippet:
|>
|>#include <sys/table.h>
|>struct tbl_swapinfo t_swapinfo;
|>
|>swap_info(void)
|>{
|> if( 0 > (table(TBL_SWAPINFO, -1, &t_swapinfo, 1, sizeof(t_swapinfo))) )
|> fprintf(stdout, "Can't get swap device information.\n");
|>
|> abort(); /* dump core for me argentina */
|>}
|>
|>(dbx) p t_swapinfo
|>struct {
|> flags = 1
|> size = 112306 <<<<<<<<<<<<< size (pages)
|> free = 93973 <<<<<<<<<<<<< free (pages)
|> dev = 8389633
|> ino = 0
|>}
|>
|>
|>swapon -s output from the same instant in time:
|>
|>Swap partition /dev/rz1b (default swap):
|> Allocated space: 16896 pages (132MB)
|> In-use space: 5787 pages ( 34%)
|> Free space: 11109 pages ( 65%)
|>
|>Swap partition /dev/rz3g:
|> Allocated space: 95410 pages (745MB)
|> In-use space: 5517 pages ( 5%)
|> Free space: 89893 pages ( 94%)
|>
|>
|>Total swap allocation:
|> Allocated space: 112306 pages (877MB) <<<<<<<<< size
|> Reserved space: 17017 pages ( 15%)
|> In-use space: 11304 pages ( 10%)
|> Available space: 95289 pages ( 84%) <<<<<<<<< free
|>
|>
|>So, why the discrepency? It doesn't matter if I'm using immediate or deferred
|>mode swapping, or if I have one or more swap partitions - apparently the
|>tbl_swapinfo table isn't getting updated as I expect.
Well, interestingly enough the swapon code is doing pretty much the identical
thing my code snippet is, perhaps this means I should believe both swapon
and my code and that my system has moderately active swapping such that I
can't generate the exact results since I can't run both codes exactly
simultaneously.
Randy Hayman
haymanr_at_icefog.alaska.edu
Received on Thu Apr 24 1997 - 02:38:39 NZST