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33 * @(#)mbuf.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/netstat/mbuf.c,v 1.17.2.3 2001/08/10 09:07:09 ru Exp $
35 * $DragonFly: src/usr.bin/netstat/mbuf.c,v 1.7 2006/10/09 22:30:48 hsu Exp $
38 #define _KERNEL_STRUCTURES
39 #include <sys/param.h>
41 #include <sys/protosw.h>
42 #include <sys/socket.h>
43 #include <sys/sysctl.h>
53 static struct mbtypenames {
58 { MT_OOBDATA, "oob data" },
59 { MT_CONTROL, "ancillary data" },
60 { MT_HEADER, "packet headers" },
61 { MT_SONAME, "socket names and addresses" },
66 * Print mbuf statistics.
69 mbpr(u_long mbaddr, u_long mbtaddr, u_long nmbcaddr, u_long nmbufaddr,
72 u_long totmem, totpossible;
73 struct mbstat *mbstat;
74 struct mbtypenames *mp;
75 int name[3], nmbclusters, nmbufs, nmbtypes;
76 size_t nmbclen, nmbuflen, mbstatlen, mbtypeslen;
81 bool *seen; /* "have we seen this type yet?" */
89 * We can't kread() mbtypeslen from a core image so we'll
90 * bogusly assume it's the same as in the running kernel.
92 if (sysctlbyname("kern.ipc.mbtypes", NULL, &mbtypeslen, NULL, 0) < 0) {
93 warn("sysctl: retrieving mbtypes length");
96 nmbtypes = mbtypeslen / sizeof(*mbtypes);
97 if ((seen = calloc(nmbtypes, sizeof(*seen))) == NULL) {
103 if (kread(ncpusaddr, (char *)&ncpus, sizeof ncpus))
105 mbstat = malloc(sizeof(*mbstat) * ncpus);
106 if (kread(mbaddr, (char *)mbstat, sizeof *mbstat * ncpus))
108 mbtypes = malloc(mbtypeslen * ncpus);
109 if (kread(mbtaddr, (char *)mbtypes, mbtypeslen * ncpus))
111 if (kread(nmbcaddr, (char *)&nmbclusters, sizeof(int)))
113 if (kread(nmbufaddr, (char *)&nmbufs, sizeof(int)))
115 for (n = 1; n < ncpus; ++n) {
116 mbstat[0].m_mbufs += mbstat[n].m_mbufs;
117 mbstat[0].m_clusters += mbstat[n].m_clusters;
118 mbstat[0].m_drops += mbstat[n].m_drops;
119 mbstat[0].m_wait += mbstat[n].m_wait;
120 mbstat[0].m_drain += mbstat[n].m_drain;
122 for (i = 0; i < nmbtypes; ++i) {
123 mbtypes[i] += mbtypes[n * nmbtypes + i];
129 name[2] = KIPC_MBSTAT;
130 mbstat = malloc(sizeof(*mbstat));
131 mbstatlen = sizeof *mbstat;
132 /* fake ncpus, kernel will aggregate mbstat array for us */
133 if (sysctl(name, 3, mbstat, &mbstatlen, 0, 0) < 0) {
134 warn("sysctl: retrieving mbstat");
138 mbtypes = malloc(mbtypeslen);
139 if (sysctlbyname("kern.ipc.mbtypes", mbtypes, &mbtypeslen, NULL,
141 warn("sysctl: retrieving mbtypes");
145 name[2] = KIPC_NMBCLUSTERS;
146 nmbclen = sizeof(int);
147 if (sysctl(name, 3, &nmbclusters, &nmbclen, 0, 0) < 0) {
148 warn("sysctl: retrieving nmbclusters");
152 nmbuflen = sizeof(int);
153 if (sysctlbyname("kern.ipc.nmbufs", &nmbufs, &nmbuflen, 0, 0) < 0) {
154 warn("sysctl: retrieving nmbufs");
160 #define MSIZE (mbstat->m_msize)
162 #define MCLBYTES (mbstat->m_mclbytes)
164 printf("%lu/%u mbufs in use (current/max):\n", mbstat->m_mbufs, nmbufs);
165 printf("%lu/%u mbuf clusters in use (current/max)\n",
166 mbstat->m_clusters, nmbclusters);
167 for (mp = mbtypenames; mp->mt_name; mp++)
168 if (mbtypes[mp->mt_type]) {
169 seen[mp->mt_type] = YES;
170 printf("\t%lu mbufs and mbuf clusters "
172 mbtypes[mp->mt_type], mp->mt_name);
175 for (i = 0; i < nmbtypes; i++)
176 if (!seen[i] && mbtypes[i]) {
177 printf("\t%lu mbufs and mbuf clusters allocated to <mbuf type %d>\n",
180 totmem = mbstat->m_mbufs * MSIZE + mbstat->m_clusters * MCLBYTES;
181 totpossible = nmbclusters * MCLBYTES + MSIZE * nmbufs;
182 printf("%lu Kbytes allocated to network (%lu%% of mb_map in use)\n",
183 totmem / 1024, (totmem * 100) / totpossible);
184 printf("%lu requests for memory denied\n", mbstat->m_drops);
185 printf("%lu requests for memory delayed\n", mbstat->m_wait);
186 printf("%lu calls to protocol drain routines\n", mbstat->m_drain);