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Annotation of 43BSD/ucb/netstat/mbuf.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  */
                      6: 
                      7: #ifndef lint
                      8: static char sccsid[] = "@(#)mbuf.c     5.1 (Berkeley) 6/4/85";
                      9: #endif not lint
                     10: 
                     11: #include <stdio.h>
                     12: #include <sys/param.h>
                     13: #include <sys/mbuf.h>
                     14: #define        YES     1
                     15: typedef int bool;
                     16: 
                     17: struct mbstat mbstat;
                     18: extern int kmem;
                     19: 
                     20: static struct mbtypes {
                     21:        int     mt_type;
                     22:        char    *mt_name;
                     23: } mbtypes[] = {
                     24:        { MT_DATA,      "data" },
                     25:        { MT_HEADER,    "packet headers" },
                     26:        { MT_SOCKET,    "socket structures" },
                     27:        { MT_PCB,       "protocol control blocks" },
                     28:        { MT_RTABLE,    "routing table entries" },
                     29:        { MT_HTABLE,    "IMP host table entries" },
                     30:        { MT_ATABLE,    "address resolution tables" },
                     31:        { MT_FTABLE,    "fragment reassembly queue headers" },
                     32:        { MT_SONAME,    "socket names and addresses" },
                     33:        { MT_ZOMBIE,    "zombie process information" },
                     34:        { MT_SOOPTS,    "socket options" },
                     35:        { MT_RIGHTS,    "access rights" },
                     36:        { MT_IFADDR,    "interface addresses" }, 
                     37:        { 0, 0 }
                     38: };
                     39: 
                     40: int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
                     41: bool seen[256];                        /* "have we seen this type yet?" */
                     42: 
                     43: /*
                     44:  * Print mbuf statistics.
                     45:  */
                     46: mbpr(mbaddr)
                     47:        off_t mbaddr;
                     48: {
                     49:        register int totmem, totfree, totmbufs;
                     50:        register int i;
                     51:        register struct mbtypes *mp;
                     52: 
                     53:        if (nmbtypes != 256) {
                     54:                fprintf(stderr, "unexpected change to mbstat; check source\n");
                     55:                return;
                     56:        }
                     57:        if (mbaddr == 0) {
                     58:                printf("mbstat: symbol not in namelist\n");
                     59:                return;
                     60:        }
                     61:        klseek(kmem, mbaddr, 0);
                     62:        if (read(kmem, &mbstat, sizeof (mbstat)) != sizeof (mbstat)) {
                     63:                printf("mbstat: bad read\n");
                     64:                return;
                     65:        }
                     66:        printf("%d/%d mbufs in use:\n",
                     67:                mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE], mbstat.m_mbufs);
                     68:        totmbufs = 0;
                     69:        for (mp = mbtypes; mp->mt_name; mp++)
                     70:                if (mbstat.m_mtypes[mp->mt_type]) {
                     71:                        seen[mp->mt_type] = YES;
                     72:                        printf("\t%d mbufs allocated to %s\n",
                     73:                            mbstat.m_mtypes[mp->mt_type], mp->mt_name);
                     74:                        totmbufs += mbstat.m_mtypes[mp->mt_type];
                     75:                }
                     76:        seen[MT_FREE] = YES;
                     77:        for (i = 0; i < nmbtypes; i++)
                     78:                if (!seen[i] && mbstat.m_mtypes[i]) {
                     79:                        printf("\t%d mbufs allocated to <mbuf type %d>\n",
                     80:                            mbstat.m_mtypes[i], i);
                     81:                        totmbufs += mbstat.m_mtypes[i];
                     82:                }
                     83:        if (totmbufs != mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE])
                     84:                printf("*** %d mbufs missing ***\n",
                     85:                        (mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE]) - totmbufs);
                     86:        printf("%d/%d mapped pages in use\n",
                     87:                mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
                     88:        totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * CLBYTES;
                     89:        totfree = mbstat.m_mtypes[MT_FREE]*MSIZE + mbstat.m_clfree * CLBYTES;
                     90:        printf("%d Kbytes allocated to network (%d%% in use)\n",
                     91:                totmem / 1024, (totmem - totfree) * 100 / totmem);
                     92:        printf("%d requests for memory denied\n", mbstat.m_drops);
                     93: }

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