4 * cc -I/usr/src/sys zallocinfo.c -o /usr/local/bin/zallocinfo -lkvm
8 * Print the slab structure and chains for all cpus.
10 * Copyright (c) 2010 The DragonFly Project. All rights reserved.
12 * This code is derived from software contributed to The DragonFly Project
13 * by Matthew Dillon <dillon@backplane.com>
15 * Redistribution and use in source and binary forms, with or without
16 * modification, are permitted provided that the following conditions
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in
23 * the documentation and/or other materials provided with the
25 * 3. Neither the name of The DragonFly Project nor the names of its
26 * contributors may be used to endorse or promote products derived
27 * from this software without specific, prior written permission.
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
32 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
33 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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35 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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43 #define _KERNEL_STRUCTURES_
44 #include <sys/param.h>
46 #include <sys/malloc.h>
47 #include <sys/slaballoc.h>
48 #include <sys/signalvar.h>
49 #include <sys/globaldata.h>
50 #include <machine/globaldata.h>
53 #include <vm/vm_page.h>
54 #include <vm/vm_kern.h>
55 #include <vm/vm_object.h>
56 #include <vm/swap_pager.h>
57 #include <vm/vnode_pager.h>
78 static void dumpslab(kvm_t *kd, int cpu, struct SLGlobalData *slab);
79 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
82 main(int ac, char **av)
84 const char *corefile = NULL;
85 const char *sysfile = NULL;
86 struct SLGlobalData slab;
93 while ((ch = getopt(ac, av, "M:N:dv")) != -1) {
108 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
115 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
119 if (kvm_nlist(kd, Nl) != 0) {
124 kkread(kd, Nl[1].n_value, &ncpus, sizeof(ncpus));
126 for (cpu = 0; cpu < ncpus; cpu++) {
128 * Get the CPU_prvspace base pointer, that is the address to
129 * CPU_prvspace[i] from where other addresses can be built
131 kkread(kd, Nl[0].n_value + cpu * sizeof(baseptr),
132 &baseptr, sizeof(baseptr));
133 /* Now get globaldata struct for the current cpu */
134 kkread(kd, baseptr + offsetof(struct mdglobaldata, mi.gd_slab),
135 &slab, sizeof(slab));
136 dumpslab(kd, cpu, &slab);
143 dumpslab(kvm_t *kd, int cpu, struct SLGlobalData *slab)
145 struct SLZone *zonep;
157 printf("cpu %d NFreeZones=%d JunkIndex=%d\n", cpu, slab->NFreeZones,
160 for (z = 0; z < NZONES; z++) {
161 for (pass = 1; pass <= 2; ++pass) {
162 zonep = TAILQ_FIRST(&slab->ZoneAry[z]);
167 kkread(kd, (u_long)zonep, &zone, sizeof(zone));
171 printf(" zone %2d", z);
172 printf(" chunk=%-5d elms=%-4d ",
173 zone.z_ChunkSize, zone.z_NMax);
175 } else if (pass == 2 && first == 0) {
181 printf(" %d", zone.z_NFree);
182 extra += zone.z_NFree * zone.z_ChunkSize;
184 chunkp = zone.z_RChunks;
187 kkread(kd, (u_long)chunkp, &chunk, sizeof(chunk));
188 chunkp = chunk.c_Next;
194 printf(" [rc=%d", xcount);
195 extra += xcount * zone.z_ChunkSize;
197 chunkp = zone.z_LChunks;
200 kkread(kd, (u_long)chunkp, &chunk, sizeof(chunk));
201 chunkp = chunk.c_Next;
210 printf("lc=%d", rcount);
212 extra += rcount * zone.z_ChunkSize;
214 if (rcount || xcount) {
218 zonep = TAILQ_NEXT(&zone, z_Entry);
220 if (first == 0 && pass == 1)
221 printf(" %6jdK free:", (intmax_t)(extra - save) / 1024);
222 if (first == 0 && pass == 2)
226 printf(" TotalUnused %jd.%03dM\n",
227 (intmax_t)extra / 1024 / 1024,
228 (int)(extra % 1024) * 999 / 1024);
232 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
234 if (kvm_read(kd, addr, buf, nbytes) != nbytes) {