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

1.1       root        1: /*
                      2:  * Copyright (c) 1983, 1988 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  */
                     17: 
                     18: #ifndef lint
                     19: static char sccsid[] = "@(#)mbuf.c     5.6 (Berkeley) 6/29/88";
                     20: #endif /* not lint */
                     21: 
                     22: #include <stdio.h>
                     23: #include <sys/param.h>
                     24: #include <sys/mbuf.h>
                     25: #define        YES     1
                     26: typedef int bool;
                     27: 
                     28: struct mbstat mbstat;
                     29: extern int kmem;
                     30: 
                     31: static struct mbtypes {
                     32:        int     mt_type;
                     33:        char    *mt_name;
                     34: } mbtypes[] = {
                     35:        { MT_DATA,      "data" },
                     36:        { MT_HEADER,    "packet headers" },
                     37:        { MT_SOCKET,    "socket structures" },
                     38:        { MT_PCB,       "protocol control blocks" },
                     39:        { MT_RTABLE,    "routing table entries" },
                     40:        { MT_HTABLE,    "IMP host table entries" },
                     41:        { MT_ATABLE,    "address resolution tables" },
                     42:        { MT_FTABLE,    "fragment reassembly queue headers" },
                     43:        { MT_SONAME,    "socket names and addresses" },
                     44:        { MT_SOOPTS,    "socket options" },
                     45:        { MT_RIGHTS,    "access rights" },
                     46:        { MT_IFADDR,    "interface addresses" }, 
                     47:        { 0, 0 }
                     48: };
                     49: 
                     50: int nmbtypes = sizeof(mbstat.m_mtypes) / sizeof(short);
                     51: bool seen[256];                        /* "have we seen this type yet?" */
                     52: 
                     53: /*
                     54:  * Print mbuf statistics.
                     55:  */
                     56: mbpr(mbaddr)
                     57:        off_t mbaddr;
                     58: {
                     59:        register int totmem, totfree, totmbufs;
                     60:        register int i;
                     61:        register struct mbtypes *mp;
                     62: 
                     63:        if (nmbtypes != 256) {
                     64:                fprintf(stderr, "unexpected change to mbstat; check source\n");
                     65:                return;
                     66:        }
                     67:        if (mbaddr == 0) {
                     68:                printf("mbstat: symbol not in namelist\n");
                     69:                return;
                     70:        }
                     71:        klseek(kmem, mbaddr, 0);
                     72:        if (read(kmem, (char *)&mbstat, sizeof (mbstat)) != sizeof (mbstat)) {
                     73:                printf("mbstat: bad read\n");
                     74:                return;
                     75:        }
                     76:        printf("%u/%u mbufs in use:\n",
                     77:                mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE], mbstat.m_mbufs);
                     78:        totmbufs = 0;
                     79:        for (mp = mbtypes; mp->mt_name; mp++)
                     80:                if (mbstat.m_mtypes[mp->mt_type]) {
                     81:                        seen[mp->mt_type] = YES;
                     82:                        printf("\t%u mbufs allocated to %s\n",
                     83:                            mbstat.m_mtypes[mp->mt_type], mp->mt_name);
                     84:                        totmbufs += mbstat.m_mtypes[mp->mt_type];
                     85:                }
                     86:        seen[MT_FREE] = YES;
                     87:        for (i = 0; i < nmbtypes; i++)
                     88:                if (!seen[i] && mbstat.m_mtypes[i]) {
                     89:                        printf("\t%u mbufs allocated to <mbuf type %d>\n",
                     90:                            mbstat.m_mtypes[i], i);
                     91:                        totmbufs += mbstat.m_mtypes[i];
                     92:                }
                     93:        if (totmbufs != mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE])
                     94:                printf("*** %u mbufs missing ***\n",
                     95:                        (mbstat.m_mbufs - mbstat.m_mtypes[MT_FREE]) - totmbufs);
                     96:        printf("%u/%u mapped pages in use\n",
                     97:                mbstat.m_clusters - mbstat.m_clfree, mbstat.m_clusters);
                     98:        totmem = mbstat.m_mbufs * MSIZE + mbstat.m_clusters * CLBYTES;
                     99:        totfree = mbstat.m_mtypes[MT_FREE]*MSIZE + mbstat.m_clfree * CLBYTES;
                    100:        printf("%u Kbytes allocated to network (%d%% in use)\n",
                    101:                totmem / 1024, (totmem - totfree) * 100 / totmem);
                    102:        printf("%u requests for memory denied\n", mbstat.m_drops);
                    103:        printf("%u requests for memory delayed\n", mbstat.m_wait);
                    104:        printf("%u calls to protocol drain routines\n", mbstat.m_drain);
                    105: }

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