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[unix-history] / usr / src / usr.bin / netstat / mbuf.c

#ifndef lint
static char sccsid[] = "@(#)mbuf.c      4.4 82/12/09";
#endif

#include <sys/param.h>
#include <sys/mbuf.h>

struct  mbstat mbstat;
extern  int kmem;

/*
* Print mbuf statistics.
*/
mbpr(mbaddr)
       off_t mbaddr;
{
       register int totmem, totfree;

       if (mbaddr == 0) {
               printf("mbstat: symbol not in namelist\n");
               return;
       }
       klseek(kmem, mbaddr, 0);
       if (read(kmem, &mbstat, sizeof (mbstat)) != sizeof (mbstat)) {
               printf("mbstat: bad read\n");
               return;
       }
       printf("%d/%d mbufs in use\n", mbstat.m_mbufs - mbstat.m_mbfree,
               mbstat.m_mbufs);
       printf("%d/%d mapped pages in use\n",
               mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
       printf("%d requests for memory denied\n", mbstat.m_drops);
       totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * CLBYTES;
       totfree = mbstat.m_mbfree * MSIZE + mbstat.m_clusters * CLBYTES;
       printf("%dKbytes allocated to network (%d%% in use)\n",
               totmem / 1024, (totmem - totfree) * 100 / totmem);
}