1#!/usr/sbin/dtrace -s 2/*- 3 * Copyright (c) 2015 George V. Neville-Neil 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 * 29 * The siftr D script collects data from the SIFTR kernel module. 30 * 31 * Usage: siftr 32 */ 33 34#pragma D option quiet 35tcp:kernel::siftr 36{ 37 printf("direction %s state %s local %d remote %d\n", 38 siftr_dir_string[args[0]->direction], 39 tcp_state_string[args[0]->conn_state], 40 args[0]->tcp_localport, 41 args[0]->tcp_foreignport); 42 printf("snd_cwnd %d snd_wnd %d rcv_wnd %d snd_bwnd %d snd_ssthresh %d\n", 43 args[0]->snd_cwnd, 44 args[0]->snd_wnd, 45 args[0]->rcv_wnd, 46 args[0]->snd_bwnd, 47 args[0]->snd_ssthresh); 48 printf("\tmax_seg_size %u smoothed_rtt %d sack_enabled %d\n", 49 args[0]->max_seg_size, 50 args[0]->smoothed_rtt, 51 args[0]->sack_enabled); 52 printf("\tsnd_scale %d rcv_scale %d flags 0x%x rxt_length %d\n", 53 args[0]->snd_scale, 54 args[0]->rcv_scale, 55 args[0]->flags, 56 args[0]->rxt_length); 57 printf("\tsnd_buf_hiwater %u snd_buf_cc %u rcv_buf_hiwater %u\n", 58 args[0]->snd_buf_hiwater, 59 args[0]->snd_buf_cc, 60 args[0]->rcv_buf_hiwater); 61 printf("\trcv_buf_cc %u sent_inflight_bytes %u t_segqlen %d\n", 62 args[0]->rcv_buf_cc, 63 args[0]->sent_inflight_bytes, 64 args[0]->t_segqlen); 65 printf("\tflowid %u flowtype %u\n", 66 args[0]->flowid, 67 args[0]->flowtype); 68} 69