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Code Issues Releases Activity
66fe5468f7
freebsd/usr.bin/netstat/mbuf.c
Bosko Milekic 025b4be197 o Allow "buckets" in mb_alloc to be differently sized (according to 
compile-time constants).  That is, a "bucket" now is not necessarily
  a page-worth of mbufs or clusters, but it is MBUF_BUCK_SZ, CLUS_BUCK_SZ
  worth of mbufs, clusters.
o Rename {mbuf,clust}_limit to {mbuf,clust}_hiwm and introduce
  {mbuf,clust}_lowm, which currently has no effect but will be used
  to set the low watermarks.
o Fix netstat so that it can deal with the differently-sized buckets
  and teach it about the low watermarks too.
o Make sure the per-cpu stats for an absent CPU has mb_active set to 0,
  explicitly.
o Get rid of the allocate refcounts from mbuf map mess.  Instead,
  just malloc() the refcounts in one shot from mbuf_init()
o Clean up / update comments in subr_mbuf.c
2003-02-20 04:26:58 +00:00

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/*
* Copyright (c) 1983, 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)mbuf.c 8.1 (Berkeley) 6/6/93";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "netstat.h"
#define YES 1
typedef int bool;
static struct mbtypenames {
short mt_type;
const char *mt_name;
} mbtypenames[] = {
{ MT_DATA, "data" },
{ MT_OOBDATA, "oob data" },
{ MT_CONTROL, "ancillary data" },
{ MT_HEADER, "packet headers" },
#ifdef MT_SOCKET
{ MT_SOCKET, "socket structures" }, /* XXX */
#endif
#ifdef MT_PCB
{ MT_PCB, "protocol control blocks" }, /* XXX */
#endif
#ifdef MT_RTABLE
{ MT_RTABLE, "routing table entries" }, /* XXX */
#endif
#ifdef MT_HTABLE
{ MT_HTABLE, "IMP host table entries" }, /* XXX */
#endif
#ifdef MT_ATABLE
{ MT_ATABLE, "address resolution tables" },
#endif
{ MT_FTABLE, "fragment reassembly queue headers" }, /* XXX */
{ MT_SONAME, "socket names and addresses" },
#ifdef MT_SOOPTS
{ MT_SOOPTS, "socket options" },
#endif
#ifdef MT_RIGHTS
{ MT_RIGHTS, "access rights" },
#endif
#ifdef MT_IFADDR
{ MT_IFADDR, "interface addresses" }, /* XXX */
#endif
{ 0, 0 }
};
/*
* Print mbuf statistics.
*/
void
mbpr(u_long mbaddr, u_long mbtaddr __unused, u_long nmbcaddr, u_long nmbufaddr,
u_long mbhiaddr, u_long clhiaddr, u_long mbloaddr, u_long clloaddr,
u_long cpusaddr __unused, u_long pgsaddr, u_long mbpaddr)
{
int i, j, nmbufs, nmbclusters, page_size, num_objs;
u_int mbuf_hiwm, clust_hiwm, mbuf_lowm, clust_lowm;
u_long totspace[2], totused[2], totnum, totfree;
short nmbtypes;
size_t mlen;
long *mbtypes = NULL;
struct mbstat *mbstat = NULL;
struct mbpstat **mbpstat = NULL;
struct mbtypenames *mp;
bool *seen = NULL;
mlen = sizeof *mbstat;
if ((mbstat = malloc(mlen)) == NULL) {
warn("malloc: cannot allocate memory for mbstat");
goto err;
}
/*
* XXX: Unfortunately, for the time being, we have to fetch
* the total length of the per-CPU stats area via sysctl
* (regardless of whether we're looking at a core or not.
*/
if (sysctlbyname("kern.ipc.mb_statpcpu", NULL, &mlen, NULL, 0) < 0) {
warn("sysctl: retrieving mb_statpcpu len");
goto err;
}
num_objs = (int)(mlen / sizeof(struct mbpstat));
if ((mbpstat = calloc(num_objs, sizeof(struct mbpstat *))) == NULL) {
warn("calloc: cannot allocate memory for mbpstats pointers");
goto err;
}
if ((mbpstat[0] = calloc(num_objs, sizeof(struct mbpstat))) == NULL) {
warn("calloc: cannot allocate memory for mbpstats");
goto err;
}
if (mbaddr) {
if (kread(mbpaddr, (char *)mbpstat[0], mlen))
goto err;
if (kread(mbaddr, (char *)mbstat, sizeof mbstat))
goto err;
if (kread(nmbcaddr, (char *)&nmbclusters, sizeof(int)))
goto err;
if (kread(nmbufaddr, (char *)&nmbufs, sizeof(int)))
goto err;
if (kread(mbhiaddr, (char *)&mbuf_hiwm, sizeof(u_int)))
goto err;
if (kread(clhiaddr, (char *)&clust_hiwm, sizeof(u_int)))
goto err;
if (kread(mbloaddr, (char *)&mbuf_lowm, sizeof(u_int)))
goto err;
if (kread(clloaddr, (char *)&clust_lowm, sizeof(u_int)))
goto err;
if (kread(pgsaddr, (char *)&page_size, sizeof(int)))
goto err;
} else {
if (sysctlbyname("kern.ipc.mb_statpcpu", mbpstat[0], &mlen,
NULL, 0) < 0) {
warn("sysctl: retrieving mb_statpcpu");
goto err;
}
mlen = sizeof *mbstat;
if (sysctlbyname("kern.ipc.mbstat", mbstat, &mlen, NULL, 0)
< 0) {
warn("sysctl: retrieving mbstat");
goto err;
}
mlen = sizeof(int);
if (sysctlbyname("kern.ipc.nmbclusters", &nmbclusters, &mlen,
NULL, 0) < 0) {
warn("sysctl: retrieving nmbclusters");
goto err;
}
mlen = sizeof(int);
if (sysctlbyname("kern.ipc.nmbufs", &nmbufs, &mlen, NULL, 0)
< 0) {
warn("sysctl: retrieving nmbufs");
goto err;
}
mlen = sizeof(u_int);
if (sysctlbyname("kern.ipc.mbuf_hiwm", &mbuf_hiwm, &mlen,
NULL, 0) < 0) {
warn("sysctl: retrieving mbuf_hiwm");
goto err;
}
mlen = sizeof(u_int);
if (sysctlbyname("kern.ipc.clust_hiwm", &clust_hiwm, &mlen,
NULL, 0) < 0) {
warn("sysctl: retrieving clust_hiwm");
goto err;
}
mlen = sizeof(u_int);
if (sysctlbyname("kern.ipc.mbuf_lowm", &mbuf_lowm, &mlen,
NULL, 0) < 0) {
warn("sysctl: retrieving mbuf_lowm");
goto err;
}
mlen = sizeof(u_int);
if (sysctlbyname("kern.ipc.clust_lowm", &clust_lowm, &mlen,
NULL, 0) < 0) {
warn("sysctl: retrieving clust_lowm");
goto err;
}
mlen = sizeof(int);
if (sysctlbyname("hw.pagesize", &page_size, &mlen, NULL, 0)
< 0) {
warn("sysctl: retrieving hw.pagesize");
goto err;
}
}
nmbtypes = mbstat->m_numtypes;
if ((seen = calloc(nmbtypes, sizeof(*seen))) == NULL) {
warn("calloc: cannot allocate memory for mbtypes seen flag");
goto err;
}
if ((mbtypes = calloc(nmbtypes, sizeof(long *))) == NULL) {
warn("calloc: cannot allocate memory for mbtypes");
goto err;
}
for (i = 0; i < num_objs; i++)
mbpstat[i] = mbpstat[0] + i;
#undef MSIZE
#define MSIZE (mbstat->m_msize)
#undef MCLBYTES
#define MCLBYTES (mbstat->m_mclbytes)
#define GENLST (num_objs - 1)
printf("mbuf usage:\n");
totnum = mbpstat[GENLST]->mb_mbbucks * mbstat->m_mbperbuck;
totfree = mbpstat[GENLST]->mb_mbfree;
printf("\tGEN cache:\t%lu/%lu (in use/in pool)\n",
totnum - totfree, totnum);
for (j = 1; j < nmbtypes; j++)
mbtypes[j] += mbpstat[GENLST]->mb_mbtypes[j];
totspace[0] = mbpstat[GENLST]->mb_mbbucks * mbstat->m_mbperbuck * MSIZE;
for (i = 0; i < (num_objs - 1); i++) {
if (mbpstat[i]->mb_active == 0)
continue;
printf("\tCPU #%d cache:\t%lu/%lu (in use/in pool)\n", i,
(mbpstat[i]->mb_mbbucks * mbstat->m_mbperbuck -
mbpstat[i]->mb_mbfree),
(mbpstat[i]->mb_mbbucks * mbstat->m_mbperbuck));
totspace[0] += mbpstat[i]->mb_mbbucks*mbstat->m_mbperbuck*MSIZE;
totnum += mbpstat[i]->mb_mbbucks * mbstat->m_mbperbuck;
totfree += mbpstat[i]->mb_mbfree;
for (j = 1; j < nmbtypes; j++)
mbtypes[j] += mbpstat[i]->mb_mbtypes[j];
}
totused[0] = totnum - totfree;
printf("\tTotal:\t\t%lu/%lu (in use/in pool)\n", totused[0], totnum);
printf("\tMbuf cache high watermark: %d\n", mbuf_hiwm);
printf("\tMbuf cache low watermark: %d\n", mbuf_lowm);
printf("\tMaximum possible: %d\n", nmbufs);
printf("\tAllocated mbuf types:\n");
for (mp = mbtypenames; mp->mt_name; mp++) {
if (mbtypes[mp->mt_type]) {
seen[mp->mt_type] = YES;
printf("\t %lu mbufs allocated to %s\n",
mbtypes[mp->mt_type], mp->mt_name);
}
}
for (i = 1; i < nmbtypes; i++) {
if (!seen[i] && mbtypes[i])
printf("\t %lu mbufs allocated to <mbuf type: %d>\n",
mbtypes[i], i);
}
printf("\t%lu%% of mbuf map consumed\n", ((totspace[0] * 100) / (nmbufs
* MSIZE)));
printf("mbuf cluster usage:\n");
totnum = mbpstat[GENLST]->mb_clbucks * mbstat->m_clperbuck;
totfree = mbpstat[GENLST]->mb_clfree;
printf("\tGEN cache:\t%lu/%lu (in use/in pool)\n",
totnum - totfree, totnum);
totspace[1] = mbpstat[GENLST]->mb_clbucks*mbstat->m_clperbuck*MCLBYTES;
for (i = 0; i < (num_objs - 1); i++) {
if (mbpstat[i]->mb_active == 0)
continue;
printf("\tCPU #%d cache:\t%lu/%lu (in use/in pool)\n", i,
(mbpstat[i]->mb_clbucks * mbstat->m_clperbuck -
mbpstat[i]->mb_clfree),
(mbpstat[i]->mb_clbucks * mbstat->m_clperbuck));
totspace[1] += mbpstat[i]->mb_clbucks * mbstat->m_clperbuck
* MCLBYTES;
totnum += mbpstat[i]->mb_clbucks * mbstat->m_clperbuck;
totfree += mbpstat[i]->mb_clfree;
}
totused[1] = totnum - totfree;
printf("\tTotal:\t\t%lu/%lu (in use/in pool)\n", totused[1], totnum);
printf("\tCluster cache high watermark: %d\n", clust_hiwm);
printf("\tCluster cache low watermark: %d\n", clust_lowm);
printf("\tMaximum possible: %d\n", nmbclusters);
printf("\t%lu%% of cluster map consumed\n", ((totspace[1] * 100) /
(nmbclusters * MCLBYTES)));
printf("%lu KBytes of wired memory reserved (%lu%% in use)\n",
(totspace[0] + totspace[1]) / 1024, ((totused[0] * MSIZE +
totused[1] * MCLBYTES) * 100) / (totspace[0] + totspace[1]));
printf("%lu requests for memory denied\n", mbstat->m_drops);
printf("%lu requests for memory delayed\n", mbstat->m_wait);
printf("%lu calls to protocol drain routines\n", mbstat->m_drain);
err:
if (mbtypes != NULL)
free(mbtypes);
if (seen != NULL)
free(seen);
if (mbstat != NULL)
free(mbstat);
if (mbpstat != NULL) {
if (mbpstat[0] != NULL)
free(mbpstat[0]);
free(mbpstat);
}
return;
}
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