mbuf.c revision 171465 
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 171465 2007-07-16 17:15:55Z jhb $");
44
45#include <sys/param.h>
46#include <sys/mbuf.h>
47#include <sys/protosw.h>
48#include <sys/socket.h>
49#include <sys/socketvar.h>
50#include <sys/sysctl.h>
51
52#include <err.h>
53#include <kvm.h>
54#include <memstat.h>
55#include <stdint.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include "netstat.h"
60
61/*
62 * Print mbuf statistics.
63 */
64void
65mbpr(void *kvmd, u_long mbaddr)
66{
67	struct memory_type_list *mtlp;
68	struct memory_type *mtp;
69	uintmax_t mbuf_count, mbuf_bytes, mbuf_free, mbuf_failures, mbuf_size;
70	uintmax_t cluster_count, cluster_bytes, cluster_limit, cluster_free;
71	uintmax_t cluster_failures, cluster_size;
72	uintmax_t packet_count, packet_bytes, packet_free, packet_failures;
73	uintmax_t tag_count, tag_bytes;
74	uintmax_t jumbop_count, jumbop_bytes, jumbop_limit, jumbop_free;
75	uintmax_t jumbop_failures, jumbop_size;
76	uintmax_t jumbo9_count, jumbo9_bytes, jumbo9_limit, jumbo9_free;
77	uintmax_t jumbo9_failures, jumbo9_size;
78	uintmax_t jumbo16_count, jumbo16_bytes, jumbo16_limit, jumbo16_free;
79	uintmax_t jumbo16_failures, jumbo16_size;
80	uintmax_t bytes_inuse, bytes_incache, bytes_total;
81	int nsfbufs, nsfbufspeak, nsfbufsused;
82	struct mbstat mbstat;
83	size_t mlen;
84	int error;
85
86	mtlp = memstat_mtl_alloc();
87	if (mtlp == NULL) {
88		warn("memstat_mtl_alloc");
89		return;
90	}
91
92	/*
93	 * Use memstat_*_all() because some mbuf-related memory is in uma(9),
94	 * and some malloc(9).
95	 */
96	if (live) {
97		if (memstat_sysctl_all(mtlp, 0) < 0) {
98			warnx("memstat_sysctl_all: %s",
99			    memstat_strerror(memstat_mtl_geterror(mtlp)));
100			goto out;
101		}
102	} else {
103		if (memstat_kvm_all(mtlp, kvmd) < 0) {
104			error = memstat_mtl_geterror(mtlp);
105			if (error == MEMSTAT_ERROR_KVM)
106				warnx("memstat_kvm_all: %s",
107				    kvm_geterr(kvmd));
108			else
109				warnx("memstat_kvm_all: %s",
110				    memstat_strerror(error));
111			goto out;
112		}
113	}
114
115	mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_MEM_NAME);
116	if (mtp == NULL) {
117		warnx("memstat_mtl_find: zone %s not found", MBUF_MEM_NAME);
118		goto out;
119	}
120	mbuf_count = memstat_get_count(mtp);
121	mbuf_bytes = memstat_get_bytes(mtp);
122	mbuf_free = memstat_get_free(mtp);
123	mbuf_failures = memstat_get_failures(mtp);
124	mbuf_size = memstat_get_size(mtp);
125
126	mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_PACKET_MEM_NAME);
127	if (mtp == NULL) {
128		warnx("memstat_mtl_find: zone %s not found",
129		    MBUF_PACKET_MEM_NAME);
130		goto out;
131	}
132	packet_count = memstat_get_count(mtp);
133	packet_bytes = memstat_get_bytes(mtp);
134	packet_free = memstat_get_free(mtp);
135	packet_failures = memstat_get_failures(mtp);
136
137	mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_CLUSTER_MEM_NAME);
138	if (mtp == NULL) {
139		warnx("memstat_mtl_find: zone %s not found",
140		    MBUF_CLUSTER_MEM_NAME);
141		goto out;
142	}
143	cluster_count = memstat_get_count(mtp);
144	cluster_bytes = memstat_get_bytes(mtp);
145	cluster_limit = memstat_get_countlimit(mtp);
146	cluster_free = memstat_get_free(mtp);
147	cluster_failures = memstat_get_failures(mtp);
148	cluster_size = memstat_get_size(mtp);
149
150	mtp = memstat_mtl_find(mtlp, ALLOCATOR_MALLOC, MBUF_TAG_MEM_NAME);
151	if (mtp == NULL) {
152		warnx("memstat_mtl_find: malloc type %s not found",
153		    MBUF_TAG_MEM_NAME);
154		goto out;
155	}
156	tag_count = memstat_get_count(mtp);
157	tag_bytes = memstat_get_bytes(mtp);
158
159	mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_JUMBOP_MEM_NAME);
160	if (mtp == NULL) {
161		warnx("memstat_mtl_find: zone %s not found",
162		    MBUF_JUMBOP_MEM_NAME);
163		goto out;
164	}
165	jumbop_count = memstat_get_count(mtp);
166	jumbop_bytes = memstat_get_bytes(mtp);
167	jumbop_limit = memstat_get_countlimit(mtp);
168	jumbop_free = memstat_get_free(mtp);
169	jumbop_failures = memstat_get_failures(mtp);
170	jumbop_size = memstat_get_size(mtp);
171
172	mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_JUMBO9_MEM_NAME);
173	if (mtp == NULL) {
174		warnx("memstat_mtl_find: zone %s not found",
175		    MBUF_JUMBO9_MEM_NAME);
176		goto out;
177	}
178	jumbo9_count = memstat_get_count(mtp);
179	jumbo9_bytes = memstat_get_bytes(mtp);
180	jumbo9_limit = memstat_get_countlimit(mtp);
181	jumbo9_free = memstat_get_free(mtp);
182	jumbo9_failures = memstat_get_failures(mtp);
183	jumbo9_size = memstat_get_size(mtp);
184
185	mtp = memstat_mtl_find(mtlp, ALLOCATOR_UMA, MBUF_JUMBO16_MEM_NAME);
186	if (mtp == NULL) {
187		warnx("memstat_mtl_find: zone %s not found",
188		    MBUF_JUMBO16_MEM_NAME);
189		goto out;
190	}
191	jumbo16_count = memstat_get_count(mtp);
192	jumbo16_bytes = memstat_get_bytes(mtp);
193	jumbo16_limit = memstat_get_countlimit(mtp);
194	jumbo16_free = memstat_get_free(mtp);
195	jumbo16_failures = memstat_get_failures(mtp);
196	jumbo16_size = memstat_get_size(mtp);
197
198	printf("%ju/%ju/%ju mbufs in use (current/cache/total)\n",
199	    mbuf_count + packet_count, mbuf_free + packet_free,
200	    mbuf_count + packet_count + mbuf_free + packet_free);
201
202	printf("%ju/%ju/%ju/%ju mbuf clusters in use "
203	    "(current/cache/total/max)\n",
204	    cluster_count - packet_free, cluster_free + packet_free,
205	    cluster_count + cluster_free, cluster_limit);
206
207	printf("%ju/%ju mbuf+clusters out of packet secondary zone in use "
208	    "(current/cache)\n",
209	    packet_count, packet_free);
210
211	printf("%ju/%ju/%ju/%ju %juk (page size) jumbo clusters in use "
212	    "(current/cache/total/max)\n",
213	    jumbop_count, jumbop_free, jumbop_count + jumbop_free,
214	    jumbop_limit, jumbop_size / 1024);
215
216	printf("%ju/%ju/%ju/%ju 9k jumbo clusters in use "
217	    "(current/cache/total/max)\n",
218	    jumbo9_count, jumbo9_free, jumbo9_count + jumbo9_free,
219	    jumbo9_limit);
220
221	printf("%ju/%ju/%ju/%ju 16k jumbo clusters in use "
222	    "(current/cache/total/max)\n",
223	    jumbo16_count, jumbo16_free, jumbo16_count + jumbo16_free,
224	    jumbo16_limit);
225
226#if 0
227	printf("%ju mbuf tags in use\n", tag_count);
228#endif
229
230	/*-
231	 * Calculate in-use bytes as:
232	 * - straight mbuf memory
233	 * - mbuf memory in packets
234	 * - the clusters attached to packets
235	 * - and the rest of the non-packet-attached clusters.
236	 * - m_tag memory
237	 * This avoids counting the clusters attached to packets in the cache.
238	 * This currently excludes sf_buf space.
239	 */
240	bytes_inuse =
241	    mbuf_bytes +			/* straight mbuf memory */
242	    packet_bytes +			/* mbufs in packets */
243	    (packet_count * cluster_size) +	/* clusters in packets */
244	    /* other clusters */
245	    ((cluster_count - packet_count - packet_free) * cluster_size) +
246	    tag_bytes +
247	    (jumbop_count * jumbop_size) +	/* jumbo clusters */
248	    (jumbo9_count * jumbo9_size) +
249	    (jumbo16_count * jumbo16_size);
250
251	/*
252	 * Calculate in-cache bytes as:
253	 * - cached straught mbufs
254	 * - cached packet mbufs
255	 * - cached packet clusters
256	 * - cached straight clusters
257	 * This currently excludes sf_buf space.
258	 */
259	bytes_incache =
260	    (mbuf_free * mbuf_size) +		/* straight free mbufs */
261	    (packet_free * mbuf_size) +		/* mbufs in free packets */
262	    (packet_free * cluster_size) +	/* clusters in free packets */
263	    (cluster_free * cluster_size) +	/* free clusters */
264	    (jumbop_free * jumbop_size) +	/* jumbo clusters */
265	    (jumbo9_free * jumbo9_size) +
266	    (jumbo16_free * jumbo16_size);
267
268	/*
269	 * Total is bytes in use + bytes in cache.  This doesn't take into
270	 * account various other misc data structures, overhead, etc, but
271	 * gives the user something useful despite that.
272	 */
273	bytes_total = bytes_inuse + bytes_incache;
274
275	printf("%juK/%juK/%juK bytes allocated to network "
276	    "(current/cache/total)\n", bytes_inuse / 1024,
277	    bytes_incache / 1024, bytes_total / 1024);
278
279	printf("%ju/%ju/%ju requests for mbufs denied (mbufs/clusters/"
280	    "mbuf+clusters)\n", mbuf_failures, cluster_failures,
281	    packet_failures);
282
283	printf("%ju/%ju/%ju requests for jumbo clusters denied "
284	    "(%juk/9k/16k)\n", jumbop_failures, jumbo9_failures,
285	    jumbo16_failures, jumbop_size / 1024);
286
287	if (live) {
288		mlen = sizeof(nsfbufs);
289		if (!sysctlbyname("kern.ipc.nsfbufs", &nsfbufs, &mlen, NULL,
290		    0) &&
291		    !sysctlbyname("kern.ipc.nsfbufsused", &nsfbufsused,
292		    &mlen, NULL, 0) &&
293		    !sysctlbyname("kern.ipc.nsfbufspeak", &nsfbufspeak,
294		    &mlen, NULL, 0))
295			printf("%d/%d/%d sfbufs in use (current/peak/max)\n",
296			    nsfbufsused, nsfbufspeak, nsfbufs);
297		mlen = sizeof(mbstat);
298		if (sysctlbyname("kern.ipc.mbstat", &mbstat, &mlen, NULL, 0)) {
299			warn("kern.ipc.mbstat");
300			goto out;
301		}
302	} else {
303		if (kread(mbaddr, (char *)&mbstat, sizeof mbstat))
304			goto out;
305	}
306	printf("%lu requests for sfbufs denied\n", mbstat.sf_allocfail);
307	printf("%lu requests for sfbufs delayed\n", mbstat.sf_allocwait);
308	printf("%lu requests for I/O initiated by sendfile\n",
309	    mbstat.sf_iocnt);
310	printf("%lu calls to protocol drain routines\n", mbstat.m_drain);
311out:
312	memstat_mtl_free(mtlp);
313}
314