test/pcpu/ncache-stats.c

   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
  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 }