1 #!/usr/sbin/dtrace -s 2 /* 3 * nfswizard.d - nfs client activity wizard. 4 * Written using DTrace (Solaris 10 3/05). 5 * 6 * This examines activity caused by NFS client processes on the same server 7 * that you are running this script on. A detailed report is generated 8 * to explain various details of NFS client activity, including response 9 * times and file access. 10 * 11 * $Id: nfswizard.d,v 1.1.1.1 2015/09/30 22:01:06 christos Exp $ 12 * 13 * USAGE: nfswizard.d # hit Ctrl-C to end sample 14 * 15 * COPYRIGHT: Copyright (c) 2005, 2006 Brendan Gregg. 16 * 17 * CDDL HEADER START 18 * 19 * The contents of this file are subject to the terms of the 20 * Common Development and Distribution License, Version 1.0 only 21 * (the "License"). You may not use this file except in compliance 22 * with the License. 23 * 24 * You can obtain a copy of the license at Docs/cddl1.txt 25 * or http://www.opensolaris.org/os/licensing. 26 * See the License for the specific language governing permissions 27 * and limitations under the License. 28 * 29 * CDDL HEADER END 30 * 31 * 02-Dec-2005 Brendan Gregg Created this. 32 * 20-Apr-2006 " " Last update. 33 */ 34 35 #pragma D option quiet 36 37 dtrace:::BEGIN 38 { 39 printf("Tracing... Hit Ctrl-C to end.\n"); 40 scriptstart = walltimestamp; 41 timestart = timestamp; 42 } 43 44 io:nfs::start 45 { 46 /* tally file sizes */ 47 @file[args[2]->fi_pathname] = sum(args[0]->b_bcount); 48 49 /* time response */ 50 start[args[0]->b_addr] = timestamp; 51 52 /* overall stats */ 53 @rbytes = sum(args[0]->b_flags & B_READ ? args[0]->b_bcount : 0); 54 @wbytes = sum(args[0]->b_flags & B_READ ? 0 : args[0]->b_bcount); 55 @events = count(); 56 } 57 58 io:nfs::done 59 /start[args[0]->b_addr]/ 60 { 61 /* calculate and save response time stats */ 62 this->elapsed = timestamp - start[args[0]->b_addr]; 63 @maxtime = max(this->elapsed); 64 @avgtime = avg(this->elapsed); 65 @qnztime = quantize(this->elapsed / 1000); 66 } 67 68 dtrace:::END 69 { 70 /* print header */ 71 printf("NFS Client Wizard. %Y -> %Y\n\n", scriptstart, walltimestamp); 72 73 /* print read/write stats */ 74 printa("Read: %@d bytes ", @rbytes); 75 normalize(@rbytes, 1000000); 76 printa("(%@d Mb)\n", @rbytes); 77 printa("Write: %@d bytes ", @wbytes); 78 normalize(@wbytes, 1000000); 79 printa("(%@d Mb)\n\n", @wbytes); 80 81 /* print throughput stats */ 82 denormalize(@rbytes); 83 normalize(@rbytes, (timestamp - timestart) / 1000000); 84 printa("Read: %@d Kb/sec\n", @rbytes); 85 denormalize(@wbytes); 86 normalize(@wbytes, (timestamp - timestart) / 1000000); 87 printa("Write: %@d Kb/sec\n\n", @wbytes); 88 89 /* print time stats */ 90 printa("NFS I/O events: %@d\n", @events); 91 normalize(@avgtime, 1000000); 92 printa("Avg response time: %@d ms\n", @avgtime); 93 normalize(@maxtime, 1000000); 94 printa("Max response time: %@d ms\n\n", @maxtime); 95 printa("Response times (us):%@d\n", @qnztime); 96 97 /* print file stats */ 98 printf("Top 25 files accessed (bytes):\n"); 99 printf(" %-64s %s\n", "PATHNAME", "BYTES"); 100 trunc(@file, 25); 101 printa(" %-64s %@d\n", @file); 102 } 103