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Use new sysctl(3) interface to mbuf statistics. While we're at it,

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count free mbufs correctly.
This commit is contained in:
Garrett Wollman 1997-02-24 20:59:03 +00:00
parent 13ae2e2d75
commit 646bbae242
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=23087
1 changed files with 45 additions and 21 deletions
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66
usr.bin/systat/mbufs.c
View file

@ -33,15 +33,17 @@
#ifndef lint
static char sccsid[] = "@(#)mbufs.c 8.1 (Berkeley) 6/6/93";
static const char rcsid[] =
"$Id$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/types.h>
#include <sys/mbuf.h>
#include <sys/sysctl.h>
#include <stdlib.h>
#include <string.h>
#include <nlist.h>
#include <paths.h>
#include "systat.h"
#include "extern.h"
@ -102,11 +104,14 @@ showmbufs()
return;
for (j = 0; j < wnd->maxy; j++) {
max = 0, index = -1;
for (i = 0; i < wnd->maxy; i++)
for (i = 0; i < wnd->maxy; i++) {
if (i == MT_FREE)
continue;
if (mb->m_mtypes[i] > max) {
max = mb->m_mtypes[i];
index = i;
}
}
if (max == 0)
break;
if (j > NNAMES)
@ -124,39 +129,58 @@ showmbufs()
while (max--)
waddch(wnd, 'X');
wclrtoeol(wnd);
mb->m_mbufs -= mb->m_mtypes[index];
mb->m_mtypes[index] = 0;
}
if (mb->m_mbufs) {
mvwprintw(wnd, 1+j, 0, "%-10.10s", "free");
if (mb->m_mbufs > 60) {
sprintf(buf, " %d", mb->m_mbufs);
mb->m_mbufs = 60;
while (mb->m_mbufs--)
waddch(wnd, 'X');
waddstr(wnd, buf);
} else {
while(mb->m_mbufs--)
waddch(wnd, 'X');
}
wclrtoeol(wnd);
j++;
}
wmove(wnd, 1+j, 0); wclrtobot(wnd);
}
static struct nlist namelist[] = {
#define X_MBSTAT 0
{ "_mbstat" },
{ "" }
};
int
initmbufs()
{
if (namelist[X_MBSTAT].n_type == 0) {
if (kvm_nlist(kd, namelist)) {
nlisterr(namelist);
return(0);
}
if (namelist[X_MBSTAT].n_type == 0) {
error("namelist on %s failed", getbootfile());
return(0);
}
size_t len;
int name[3];
name[0] = CTL_KERN;
name[1] = KERN_IPC;
name[2] = KIPC_MBSTAT;
len = 0;
if (sysctl(name, 3, 0, &len, 0, 0) < 0) {
error("sysctl getting mbstat size failed");
return 0;
}
if (mb == 0)
mb = (struct mbstat *)calloc(1, sizeof (*mb));
return(1);
mb = (struct mbstat *)calloc(1, sizeof *mb);
return 1;
}
void
fetchmbufs()
{
if (namelist[X_MBSTAT].n_type == 0)
int name[3];
size_t len;
name[0] = CTL_KERN;
name[1] = KERN_IPC;
name[2] = KIPC_MBSTAT;
len = sizeof *mb;
if (sysctl(name, 3, mb, &len, 0, 0) < 0)
return;
NREAD(X_MBSTAT, mb, sizeof (*mb));
}