1 /* 2 * Copyright (c) 2003, 2004 Hiten Pandya <hmp@backplane.com>. 3 * 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following 12 * 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 * 18 * THIS SOFTWARE IS PROVIDED BY HITEN PANDYA AND CONTRIBUTORS "AS IS" AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL HITEN PANDYA OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 25 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 26 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 27 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 28 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * $DragonFly: src/test/pcpu/ncache-stats.c,v 1.2 2004/06/28 02:57:11 drhodus Exp $ 31 */ 32 33 #include <sys/param.h> 34 #include <sys/nchstats.h> 35 #include <sys/sysctl.h> 36 37 #include <stdio.h> 38 #include <stdlib.h> 39 #include <strings.h> 40 #include <err.h> 41 #include <kvm.h> 42 43 #define _NCH_ENT(t, n, tt) \ 44 printf("%-20s", t); \ 45 for (i = 1; i <= ncpus; ++i) { \ 46 printf("%-9ld%s", nch[i-1]. ## n, "\t"); \ 47 if (i == ncpus) \ 48 printf("(%-9ld)\n", tt. ## n); \ 49 } \ 50 51 /* 52 * Aggregate the per-cpu counters we retrieved via sysctl(2) 53 * to give the total across the CPUs. Use a nasty trick to 54 * aggregate the counters in the structure! YYY 55 */ 56 #if 0 57 static void 58 nch_cpuagg(struct nchstats *unagg, struct nchstats *ttl, int cpucnt) 59 { 60 int i, off, siz; 61 siz = sizeof(struct nchstats); 62 63 if (!unagg && !ttl) 64 return; 65 66 bzero(ttl, siz); 67 68 /* kick hmp@ for this nasty loop! :-) */ 69 for (i = 0; i < cpucnt; ++i) { 70 for (off = 0; off < siz; off += sizeof(u_long)) { 71 *(u_long *)((char *)(*(&ttl)) + off) += 72 *(u_long *)((char *)&unagg[i] + off); 73 } 74 } 75 } 76 #endif 77 78 int main(void) 79 { 80 int i, ncpus; 81 struct nchstats *nch, total; 82 size_t nch_len = SMP_MAXCPU * sizeof(struct nchstats); 83 u_long nchtotal; 84 85 nch = malloc(nch_len); 86 if (!nch) 87 exit(-1); 88 89 /* retrieve the statistics */ 90 if (sysctlbyname("vfs.cache.nchstats", nch, &nch_len, NULL, 0) < 0) { 91 warn("sysctl"); 92 exit(-1); 93 } else { 94 nch = realloc(nch, nch_len); 95 if (!nch) 96 exit(-1); 97 } 98 99 ncpus = nch_len / sizeof(struct nchstats); 100 101 #if defined(DEBUG) 102 printf("Number of processors = %d\n", ncpus); 103 #endif 104 105 kvm_nch_cpuagg(nch, &total, ncpus); 106 nchtotal = total.ncs_goodhits + total.ncs_neghits + 107 total.ncs_badhits + total.ncs_falsehits + 108 total.ncs_miss + total.ncs_long; 109 110 printf("VFS Name Cache Effectiveness Statistics\n"); 111 printf("%9ld total name lookups\n",nchtotal); 112 113 printf("%-20s", "COUNTER"); 114 115 for (i = 1; i <= ncpus; ++i) { 116 printf("%3s-%-2d%s", "CPU", i, "\t"); 117 if (i == ncpus) 118 printf("\t%-9s\n", "TOTAL"); 119 } 120 121 _NCH_ENT("goodhits", ncs_goodhits, total); 122 _NCH_ENT("neghits", ncs_neghits, total); 123 _NCH_ENT("badhits", ncs_badhits, total); 124 _NCH_ENT("falsehits", ncs_falsehits, total); 125 _NCH_ENT("misses", ncs_miss, total); 126 _NCH_ENT("longnames", ncs_long, total); 127 _NCH_ENT("passes 2", ncs_pass2, total); 128 _NCH_ENT("2-passes", ncs_2passes, total); 129 130 free(nch); 131 132 return 0; 133 } 134