4 * cc -I/usr/src/sys slabinfo.c -o ~/bin/slabinfo -lkvm
8 * dump kernel slab allocator pcpu data and chains
10 * Copyright (c) 2012 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,
34 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
35 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
36 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
37 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
38 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
39 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 #define _KERNEL_STRUCTURES
44 #include <sys/param.h>
46 #include <sys/malloc.h>
47 #include <sys/signalvar.h>
48 #include <sys/vnode.h>
49 #include <sys/namecache.h>
50 #include <sys/globaldata.h>
51 #include <machine/globaldata.h>
52 #include <sys/slaballoc.h>
55 #include <vm/vm_page.h>
56 #include <vm/vm_kern.h>
57 #include <vm/vm_page.h>
58 #include <vm/vm_object.h>
59 #include <vm/swap_pager.h>
60 #include <vm/vnode_pager.h>
79 int slzonedump(kvm_t
*kd
, SLZoneList
*list
);
80 void kkread(kvm_t
*kd
, u_long addr
, void *buf
, size_t nbytes
);
83 main(int ac
, char **av
)
85 const char *corefile
= NULL
;
86 const char *sysfile
= NULL
;
95 struct privatespace
**psary
;
97 while ((ch
= getopt(ac
, av
, "M:N:dv")) != -1) {
112 fprintf(stderr
, "%s [-M core] [-N system]\n", av
[0]);
119 if ((kd
= kvm_open(sysfile
, corefile
, NULL
, O_RDONLY
, "kvm:")) == NULL
) {
123 if (kvm_nlist(kd
, Nl
) != 0) {
128 kkread(kd
, Nl
[1].n_value
, &ncpus
, sizeof(int));
132 psary
= malloc(sizeof(void *) * ncpus
);
133 kkread(kd
, Nl
[0].n_value
, psary
, sizeof(void *) * ncpus
);
135 for (i
= 0; i
< ncpus
; ++i
) {
136 kkread(kd
, (long)psary
[i
], &gd
, sizeof(gd
));
137 printf("CPU %02d (NFreeZones=%d) {\n",
138 i
, gd
.gd_slab
.NFreeZones
);
139 totalfree
+= gd
.gd_slab
.NFreeZones
;
141 for (j
= 0; j
< NZONES
; ++j
) {
142 printf(" Zone %02d {\n", j
);
143 totalzones
+= slzonedump(kd
, &gd
.gd_slab
.ZoneAry
[j
]);
147 printf(" FreeZone {\n");
148 totalzones
+= slzonedump(kd
, &gd
.gd_slab
.FreeZones
);
151 printf(" FreeOVZon {\n");
152 totalzones
+= slzonedump(kd
, &gd
.gd_slab
.FreeOvZones
);
157 printf("TotalZones %d x 131072 = %jd\n",
158 totalzones
, (intmax_t)totalzones
* 131072LL);
159 printf("TotalFree %d x 131072 = %jd\n",
160 totalfree
, (intmax_t)totalfree
* 131072LL);
165 slzonedump(kvm_t
*kd
, SLZoneList
*list
)
171 kslz
= TAILQ_FIRST(list
);
174 kkread(kd
, (u_long
)kslz
, &slz
, sizeof(slz
));
175 printf("\t{ magic=%08x cpu=%d chunking=%d NFree=%d/%d RCnt=%d}\n",
176 slz
.z_Magic
, slz
.z_Cpu
, slz
.z_ChunkSize
,
177 slz
.z_NFree
, slz
.z_NMax
, slz
.z_RCount
);
178 kslz
= TAILQ_NEXT(&slz
, z_Entry
);
185 kkread(kvm_t
*kd
, u_long addr
, void *buf
, size_t nbytes
)
187 if (kvm_read(kd
, addr
, buf
, nbytes
) != nbytes
) {