mbuf.c revision 155543
1/* 2 * Copyright (c) 1983, 1988, 1993 3 * The Regents of the University of California. 4 * Copyright (c) 2005 Robert N. M. Watson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36#if 0 37#ifndef lint 38static char sccsid[] = "@(#)mbuf.c 8.1 (Berkeley) 6/6/93"; 39#endif /* not lint */ 40#endif 41 42#include <sys/cdefs.h> 43__FBSDID("$FreeBSD: head/usr.bin/netstat/mbuf.c 155543 2006-02-11 17:18:36Z rwatson $"); 44 45#include <sys/param.h> 46#include <sys/mbuf.h> 47#include <sys/protosw.h> 48#include <sys/socket.h> 49#include <sys/sysctl.h> 50 51#include <err.h> 52#include <kvm.h> 53#include <memstat.h> 54#include <stdio.h> 55#include <stdlib.h> 56#include <string.h> 57#include "netstat.h" 58 59/* 60 * Print mbuf statistics. 61 */ 62void 63mbpr(void *kvmd, u_long mbaddr) 64{ 65 struct memory_type_list *mtlp; 66 struct memory_type *mtp; 67 u_int64_t mbuf_count, mbuf_bytes, mbuf_free, mbuf_failures, mbuf_size; 68 u_int64_t cluster_count, cluster_bytes, cluster_limit, cluster_free; 69 u_int64_t cluster_failures, cluster_size; 70 u_int64_t packet_count, packet_bytes, packet_free, packet_failures; 71 u_int64_t tag_count, tag_bytes; 72 u_int64_t bytes_inuse, bytes_incache, bytes_total; 73 int nsfbufs, nsfbufspeak, nsfbufsused; 74 struct mbstat mbstat; 75 size_t mlen; 76 int error, live; 77 78 live = (kvmd == NULL); 79 mtlp = memstat_mtl_alloc(); 80 if (mtlp == NULL) { 81 warn("memstat_mtl_alloc"); 82 return; 83 } 84 85 /* 86 * Use memstat_*_all() because some mbuf-related memory is in uma(9), 87 * and some malloc(9). 88 */ 89 if (live) { 90 if (memstat_sysctl_all(mtlp, 0) < 0) { 91 warnx("memstat_sysctl_all: %s", 92 memstat_strerror(memstat_mtl_geterror(mtlp))); 93 goto out; 94 } 95 } else { 96 if (memstat_kvm_all(mtlp, kvmd) < 0) { 97 error = memstat_mtl_geterror(mtlp); 98 if (error == MEMSTAT_ERROR_KVM) 99 warnx("memstat_kvm_all: %s", 100 kvm_geterr(kvmd)); 101 else 102 warnx("memstat_kvm_all: %s", 103 memstat_strerror(error)); 104 goto out; 105 } 106 } 107 108 mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_MEM_NAME); 109 if (mtp == NULL) { 110 warnx("memstat_mtl_find: zone %s not found", MBUF_MEM_NAME); 111 goto out; 112 } 113 mbuf_count = memstat_get_count(mtp); 114 mbuf_bytes = memstat_get_bytes(mtp); 115 mbuf_free = memstat_get_free(mtp); 116 mbuf_failures = memstat_get_failures(mtp); 117 mbuf_size = memstat_get_size(mtp); 118 119 mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_PACKET_MEM_NAME); 120 if (mtp == NULL) { 121 warnx("memstat_mtl_find: zone %s not found", 122 MBUF_PACKET_MEM_NAME); 123 goto out; 124 } 125 packet_count = memstat_get_count(mtp); 126 packet_bytes = memstat_get_bytes(mtp); 127 packet_free = memstat_get_free(mtp); 128 packet_failures = memstat_get_failures(mtp); 129 130 mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_CLUSTER_MEM_NAME); 131 if (mtp == NULL) { 132 warnx("memstat_mtl_find: zone %s not found", 133 MBUF_CLUSTER_MEM_NAME); 134 goto out; 135 } 136 cluster_count = memstat_get_count(mtp); 137 cluster_bytes = memstat_get_bytes(mtp); 138 cluster_limit = memstat_get_countlimit(mtp); 139 cluster_free = memstat_get_free(mtp); 140 cluster_failures = memstat_get_failures(mtp); 141 cluster_size = memstat_get_size(mtp); 142 143 mtp = memstat_mtl_find(mtlp, ALLOCATOR_MALLOC, MBUF_TAG_MEM_NAME); 144 if (mtp == NULL) { 145 warnx("memstat_mtl_find: malloc type %s not found", 146 MBUF_TAG_MEM_NAME); 147 goto out; 148 } 149 tag_count = memstat_get_count(mtp); 150 tag_bytes = memstat_get_bytes(mtp); 151 152 printf("%llu/%llu/%llu mbufs in use (current/cache/total)\n", 153 mbuf_count + packet_count, mbuf_free + packet_free, 154 mbuf_count + packet_count + mbuf_free + packet_free); 155 156 printf("%llu/%llu/%llu/%llu mbuf clusters in use " 157 "(current/cache/total/max)\n", 158 cluster_count - packet_free, cluster_free + packet_free, 159 cluster_count + cluster_free, cluster_limit); 160 161#if 0 162 printf("%llu mbuf tags in use\n", tag_count); 163#endif 164 165 if (live) { 166 mlen = sizeof(nsfbufs); 167 if (!sysctlbyname("kern.ipc.nsfbufs", &nsfbufs, &mlen, NULL, 168 0) && 169 !sysctlbyname("kern.ipc.nsfbufsused", &nsfbufsused, 170 &mlen, NULL, 0) && 171 !sysctlbyname("kern.ipc.nsfbufspeak", &nsfbufspeak, 172 &mlen, NULL, 0)) { 173 printf("%d/%d/%d sfbufs in use (current/peak/max)\n", 174 nsfbufsused, nsfbufspeak, nsfbufs); 175 } 176 } 177 178 /*- 179 * Calculate in-use bytes as: 180 * - straight mbuf memory 181 * - mbuf memory in packets 182 * - the clusters attached to packets 183 * - and the rest of the non-packet-attached clusters. 184 * - m_tag memory 185 * This avoids counting the clusters attached to packets in the cache. 186 * This currently excludes sf_buf space. 187 */ 188 bytes_inuse = 189 mbuf_bytes + /* straight mbuf memory */ 190 packet_bytes + /* mbufs in packets */ 191 (packet_count * cluster_size) + /* clusters in packets */ 192 /* other clusters */ 193 ((cluster_count - packet_count - packet_free) * cluster_size) + 194 tag_bytes; 195 196 /* 197 * Calculate in-cache bytes as: 198 * - cached straught mbufs 199 * - cached packet mbufs 200 * - cached packet clusters 201 * - cached straight clusters 202 * This currently excludes sf_buf space. 203 */ 204 bytes_incache = 205 (mbuf_free * mbuf_size) + /* straight free mbufs */ 206 (packet_free * mbuf_size) + /* mbufs in free packets */ 207 (packet_free * cluster_size) + /* clusters in free packets */ 208 (cluster_free * cluster_size); /* free clusters */ 209 210 /* 211 * Total is bytes in use + bytes in cache. This doesn't take into 212 * account various other misc data structures, overhead, etc, but 213 * gives the user something useful despite that. 214 */ 215 bytes_total = bytes_inuse + bytes_incache; 216 217 printf("%lluK/%lluK/%lluK bytes allocated to network " 218 "(current/cache/total)\n", bytes_inuse / 1024, 219 bytes_incache / 1024, bytes_total / 1024); 220 221 printf("%llu/%llu/%llu requests for mbufs denied (mbufs/clusters/" 222 "mbuf+clusters)\n", mbuf_failures, cluster_failures, 223 packet_failures); 224 225 if (live) { 226 mlen = sizeof(mbstat); 227 if (sysctlbyname("kern.ipc.mbstat", &mbstat, &mlen, NULL, 0)) { 228 warn("kern.ipc.mbstat"); 229 goto out; 230 } 231 } else { 232 if (kread(mbaddr, (char *)&mbstat, sizeof mbstat)) 233 goto out; 234 } 235 printf("%lu requests for sfbufs denied\n", mbstat.sf_allocfail); 236 printf("%lu requests for sfbufs delayed\n", mbstat.sf_allocwait); 237 printf("%lu requests for I/O initiated by sendfile\n", 238 mbstat.sf_iocnt); 239 printf("%lu calls to protocol drain routines\n", mbstat.m_drain); 240out: 241 memstat_mtl_free(mtlp); 242} 243