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 1.3 2004/07/16 05:04:36 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 /* 56 * Aggregate the per-cpu counters we retrieved via sysctl(2) 57 * to give the total across the CPUs. Use a nasty trick to 58 * aggregate the counters in the structure! YYY 59 */ 60 #if 0 61 static void 62 nch_cpuagg(struct nchstats *unagg, struct nchstats *ttl, int cpucnt) 63 { 64 int i, off, siz; 65 siz = sizeof(struct nchstats); 66 67 if (!unagg && !ttl) 68 return; 69 70 bzero(ttl, siz); 71 72 /* kick hmp@ for this nasty loop! :-) */ 73 for (i = 0; i < cpucnt; ++i) { 74 for (off = 0; off < siz; off += sizeof(u_long)) { 75 *(u_long *)((char *)(*(&ttl)) + off) += 76 *(u_long *)((char *)&unagg[i] + off); 77 } 78 } 79 } 80 #endif 81 82 int main(void) 83 { 84 int i, ncpus; 85 struct nchstats *nch, total; 86 size_t nch_len = SMP_MAXCPU * sizeof(struct nchstats); 87 u_long nchtotal; 88 89 nch = malloc(nch_len); 90 if (!nch) 91 exit(-1); 92 93 /* retrieve the statistics */ 94 if (sysctlbyname("vfs.cache.nchstats", nch, &nch_len, NULL, 0) < 0) { 95 warn("sysctl"); 96 exit(-1); 97 } else { 98 nch = realloc(nch, nch_len); 99 if (!nch) 100 exit(-1); 101 } 102 103 ncpus = nch_len / sizeof(struct nchstats); 104 105 #if defined(DEBUG) 106 printf("Number of processors = %d\n", ncpus); 107 #endif 108 109 kvm_nch_cpuagg(nch, &total, ncpus); 110 nchtotal = total.ncs_goodhits + total.ncs_neghits + 111 total.ncs_badhits + total.ncs_falsehits + 112 total.ncs_miss + total.ncs_long; 113 114 printf("VFS Name Cache Effectiveness Statistics\n"); 115 printf("%9ld total name lookups\n",nchtotal); 116 117 printf("%-20s", "COUNTER"); 118 119 for (i = 1; i <= ncpus; ++i) { 120 printf("%3s-%-2d%s", "CPU", i, "\t"); 121 if (i == ncpus) 122 printf("\t%-9s\n", "TOTAL"); 123 } 124 125 _NCH_ENT("goodhits", ncs_goodhits, total); 126 _NCH_ENT("neghits", ncs_neghits, total); 127 _NCH_ENT("badhits", ncs_badhits, total); 128 _NCH_ENT("falsehits", ncs_falsehits, total); 129 _NCH_ENT("misses", ncs_miss, total); 130 _NCH_ENT("longnames", ncs_long, total); 131 _NCH_ENT("passes 2", ncs_pass2, total); 132 _NCH_ENT("2-passes", ncs_2passes, total); 133 134 free(nch); 135 136 return 0; 137 } 138