void system_memory(void)
{
#define pagetob(size) ((size) << (uvmexp.pageshift))
struct uvmexp uvmexp;
int nswap, rnswap, i;
int mib[] = { CTL_VM, VM_UVMEXP };
size_t size = sizeof (uvmexp);
if (sysctl(mib, 2, &uvmexp, &size, NULL, 0) < 0)
return 0;
bm.mem_used = pagetob(uvmexp.active);
bm.mem_max = pagetob(uvmexp.npages);
bm.swap_used = 0;
bm.swap_max = 0;
if ((nswap = swapctl(SWAP_NSWAP, 0, 0)) != 0) {
struct swapent *swdev = malloc(nswap * sizeof(*swdev));
if((rnswap = swapctl(SWAP_STATS, swdev, nswap)) != nswap) {
for (i = 0; i < nswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) {
bm.swap_used += (swdev[i].se_inuse / (1024 / DEV_BSIZE));
bm.swap_max += (swdev[i].se_nblks / (1024 / DEV_BSIZE));
}
}
}
free(swdev);
}
}
void KMemoryWidget::update()
{
int pageshift; /* log base 2 of the pagesize */
register int pagesize;
vm_statistics_data_t vmstats;
int swap_pages = 0, swap_free = 0, i;
struct tbl_swapinfo swbuf;
/* get the page size with "getpagesize" and calculate pageshift from it */
pagesize = getpagesize();
pageshift = 0;
while(pagesize > 1)
{
pageshift++;
pagesize >>= 1;
}
/* we only need the amount of log(2)1024 for our conversion */
pageshift -= LOG1024;
/* memory information */
/* this is possibly bogus - we work out total # pages by */
/* adding up the free, active, inactive, wired down, and */
/* zero filled. Anyone who knows a better way, TELL ME! */
/* Change: dont use zero filled. */
(void)::vm_statistics(::task_self(), &vmstats);
/* thanks DEC for the table() command. No thanks at all for */
/* omitting the man page for it from OSF/1 1.2, and failing */
/* to document SWAPINFO in the 1.3 man page. Lets hear it for */
/* include files. */
i = 0;
while(table(TBL_SWAPINFO, i, &swbuf, 1, sizeof(struct tbl_swapinfo)) > 0)
{
swap_pages += swbuf.size;
swap_free += swbuf.free;
i++;
}
Memory_Info[TOTAL_MEM] = pagetob((vmstats.free_count + vmstats.active_count + vmstats.inactive_count + vmstats.wire_count));
Memory_Info[FREE_MEM] = pagetob(vmstats.free_count);
Memory_Info[SHARED_MEM] = NO_MEMORY_INFO; /* FIXME ?? */
Memory_Info[BUFFER_MEM] = NO_MEMORY_INFO; /* FIXME ?? */
#ifdef __GNUC__
#warning "FIXME: Memory_Info[CACHED_MEM]"
#endif
Memory_Info[CACHED_MEM] = NO_MEMORY_INFO; /* cached memory in ram */
Memory_Info[SWAP_MEM] = pagetob(swap_pages);
Memory_Info[FREESWAP_MEM] = pagetob(swap_free);
}
