1 /*
2 * Copyright (c) 2003, 2004 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Hiten Pandya <hmp@backplane.com>.
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 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $DragonFly: src/test/pcpu/ncache-stats.c,v 1.6 2005/05/01 03:01:20 hmp Exp $
35 */
36
37 #include <sys/param.h>
38 #include <sys/nchstats.h>
39 #include <sys/sysctl.h>
40
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <strings.h>
44 #include <err.h>
45 #include <kvm.h>
46
47 #define _NCH_ENT(t, n, tt) \
48 printf("%-20s", t); \
49 for (i = 1; i <= ncpus; ++i) { \
50 printf("%-9ld%s", nch[i-1].n, "\t"); \
51 if (i == ncpus) \
52 printf("(%-9ld)\n", tt.n); \
53 } \
54
55
main(void)56 int main(void)
57 {
58 int i, ncpus;
59 struct nchstats *nch, total;
60 size_t nch_len = SMP_MAXCPU * sizeof(struct nchstats);
61 u_long nchtotal;
62
63 nch = malloc(nch_len);
64 if (nch == NULL)
65 exit(-1);
66
67 /* retrieve the statistics */
68 if (sysctlbyname("vfs.cache.nchstats", nch, &nch_len, NULL, 0) < 0) {
69 warn("sysctl");
70 exit(-1);
71 } else {
72 nch = reallocf(nch, nch_len);
73 if (nch == NULL)
74 exit(-1);
75 }
76
77 ncpus = nch_len / sizeof(struct nchstats);
78
79 #if defined(DEBUG)
80 printf("Number of processors = %d\n", ncpus);
81 #endif
82
83 kvm_nch_cpuagg(nch, &total, ncpus);
84 nchtotal = total.ncs_goodhits + total.ncs_neghits +
85 total.ncs_badhits + total.ncs_falsehits +
86 total.ncs_miss + total.ncs_long;
87
88 printf("VFS Name Cache Effectiveness Statistics\n");
89 printf("%9ld total name lookups\n",nchtotal);
90
91 printf("%-20s", "COUNTER");
92
93 for (i = 1; i <= ncpus; ++i) {
94 printf("%3s-%-2d%s", "CPU", i, "\t");
95 if (i == ncpus)
96 printf("\t%-9s\n", "TOTAL");
97 }
98
99 _NCH_ENT("goodhits", ncs_goodhits, total);
100 _NCH_ENT("neghits", ncs_neghits, total);
101 _NCH_ENT("badhits", ncs_badhits, total);
102 _NCH_ENT("falsehits", ncs_falsehits, total);
103 _NCH_ENT("misses", ncs_miss, total);
104 _NCH_ENT("longnames", ncs_long, total);
105 _NCH_ENT("passes 2", ncs_pass2, total);
106 _NCH_ENT("2-passes", ncs_2passes, total);
107
108 free(nch);
109
110 return 0;
111 }
112