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/sys/sys/nchstats.h,v 1.3 2004/07/16 05:04:36 hmp Exp $ 35 */ 36 #ifndef _SYS_NCHSTATS_H_ 37 #define _SYS_NCHSTATS_H_ 38 39 /* 40 * Statistics on the usefulness of namei caches. 41 * (per-cpu) 42 * 43 * Allocated in an array so make sure this is cache-aligned. 44 */ 45 struct nchstats { 46 unsigned long ncs_goodhits; /* hits that we can really use */ 47 unsigned long ncs_neghits; /* negative hits that we can use */ 48 unsigned long ncs_badhits; /* hits we must drop */ 49 unsigned long ncs_falsehits; /* hits with id mismatch */ 50 unsigned long ncs_miss; /* misses */ 51 unsigned long ncs_longhits; /* path lookup hits */ 52 unsigned long ncs_longmiss; /* path lookup misses */ 53 unsigned long ncs_unused; /* number of times we attempt it */ 54 } __cachealign; 55 56 #endif /* _SYS_NCHSTATS_H_ */ 57