1 #!/usr/sbin/dtrace -s 2 /* 3 * dnlcps.d - DNLC stats by process. 4 * Written in DTrace (Solaris 10 3/05). 5 * 6 * The DNLC is the Directory Name Lookup Cache. Filename lookups often 7 * return a hit from here, before needing to traverse the regular file 8 * system cache or go to disk. 9 * 10 * dnlcps.d prints DNLC statistics by process. 11 * 12 * $Id: dnlcps.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 13 * 14 * USAGE: dnlcps.d # wait several seconds, then hit Ctrl-C 15 * 16 * FIELDS: 17 * PID Process ID 18 * CMD Command name 19 * value 0 == miss, 1 == hit 20 * count number of occurrences 21 * 22 * COPYRIGHT: Copyright (c) 2006 Brendan Gregg. 23 * 24 * CDDL HEADER START 25 * 26 * The contents of this file are subject to the terms of the 27 * Common Development and Distribution License, Version 1.0 only 28 * (the "License"). You may not use this file except in compliance 29 * with the License. 30 * 31 * You can obtain a copy of the license at Docs/cddl1.txt 32 * or http://www.opensolaris.org/os/licensing. 33 * See the License for the specific language governing permissions 34 * and limitations under the License. 35 * 36 * CDDL HEADER END 37 * 38 * 27-Mar-2004 Brendan Gregg Created this. 39 * 14-Jun-2005 " " Rewrote this a lot. 40 * 18-Feb-2006 " " Last update. 41 */ 42 43 #pragma D option quiet 44 45 /* 46 * Print header 47 */ 48 dtrace:::BEGIN 49 { 50 printf("Tracing... Hit Ctrl-C to end.\n"); 51 } 52 53 /* 54 * DNLC return 55 */ 56 fbt:genunix:dnlc_lookup:return 57 { 58 this->code = arg1 == 0 ? 0 : 1; 59 @Result[execname, pid] = lquantize(this->code, 0, 1, 1); 60 } 61 62 /* 63 * Print report 64 */ 65 dtrace:::END 66 { 67 printa(" CMD: %-16s PID: %d\n%@d\n", @Result); 68 } 69