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first try sysctl to get swap info on freebsd

This commit is contained in:
Doug MacEachern 2005-02-15 02:43:52 +00:00
parent d02f09c178
commit eddfa04179
1 changed files with 80 additions and 5 deletions
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75
src/os/darwin/darwin_sigar.c
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@ -254,6 +254,79 @@ int sigar_mem_get(sigar_t *sigar, sigar_mem_t *mem)
#define VM_DIR "/private/var/vm"
#define SWAPFILE "swapfile"
#define NL_SWAPBLIST 0
#define NL_SWDEVT 1
#define NL_NSWDEV 2
#define NL_DMMAX 3
#define SWI_MAXMIB 3
/* code in this function is based on FreeBSD 5.3 kvm_getswapinfo.c */
static int getswapinfo_sysctl(struct kvm_swap *swap_ary,
int swap_max)
{
int ti, ttl;
size_t mibi, len, size;
int soid[SWI_MAXMIB];
struct xswdev xsd;
struct kvm_swap tot;
int unswdev, dmmax;
/* XXX this can be optimized by using os_open */
size = sizeof(dmmax);
if (sysctlbyname("vm.dmmax", &dmmax, &size, NULL, 0) == -1) {
return errno;
}
mibi = SWI_MAXMIB - 1;
if (sysctlnametomib("vm.swap_info", soid, &mibi) == -1) {
return errno;
}
bzero(&tot, sizeof(tot));
for (unswdev = 0;; unswdev++) {
soid[mibi] = unswdev;
len = sizeof(xsd);
if (sysctl(soid, mibi + 1, &xsd, &len, NULL, 0) == -1) {
if (errno == ENOENT) {
break;
}
return errno;
}
#if 0
if (len != sizeof(xsd)) {
_kvm_err(kd, kd->program, "struct xswdev has unexpected "
"size; kernel and libkvm out of sync?");
return -1;
}
if (xsd.xsw_version != XSWDEV_VERSION) {
_kvm_err(kd, kd->program, "struct xswdev version "
"mismatch; kernel and libkvm out of sync?");
return -1;
}
#endif
ttl = xsd.xsw_nblks - dmmax;
if (unswdev < swap_max - 1) {
bzero(&swap_ary[unswdev], sizeof(swap_ary[unswdev]));
swap_ary[unswdev].ksw_total = ttl;
swap_ary[unswdev].ksw_used = xsd.xsw_used;
swap_ary[unswdev].ksw_flags = xsd.xsw_flags;
}
tot.ksw_total += ttl;
tot.ksw_used += xsd.xsw_used;
}
ti = unswdev;
if (ti >= swap_max) {
ti = swap_max - 1;
}
if (ti >= 0) {
swap_ary[ti] = tot;
}
return SIGAR_OK;
}
int sigar_swap_get(sigar_t *sigar, sigar_swap_t *swap)
{
#ifdef DARWIN
@ -312,6 +385,7 @@ int sigar_swap_get(sigar_t *sigar, sigar_swap_t *swap)
#else
struct kvm_swap kswap[1];
if (getswapinfo_sysctl(kswap, 1) != SIGAR_OK) {
if (!sigar->kmem) {
return SIGAR_EPERM_KMEM;
}
@ -319,6 +393,7 @@ int sigar_swap_get(sigar_t *sigar, sigar_swap_t *swap)
if (kvm_getswapinfo(sigar->kmem, kswap, 1, 0) < 0) {
return errno;
}
}
if (kswap[0].ksw_total == 0) {
swap->total = 0;