Date: Wed, 29 Apr 2015 18:07:59 +0000 (UTC) From: "George V. Neville-Neil" <gnn@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r282242 - head/share/dtrace Message-ID: <201504291807.t3TI7xif045357@svn.freebsd.org>
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Author: gnn Date: Wed Apr 29 18:07:58 2015 New Revision: 282242 URL: https://svnweb.freebsd.org/changeset/base/282242 Log: Brief demo script showing the various values that can be read via the new SIFTR statically defined tracepoint (SDT). Reviewed by: bz, markj Added: head/share/dtrace/siftr (contents, props changed) Added: head/share/dtrace/siftr ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/share/dtrace/siftr Wed Apr 29 18:07:58 2015 (r282242) @@ -0,0 +1,68 @@ +#!/usr/sbin/dtrace -s +/*- + * Copyright (c) 2015 George V. Neville-Neil + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + * + * The siftr D script collects data from the SIFTR kernel module. + * + * Usage: siftr + */ + +#pragma D option quiet +tcp:kernel::siftr +{ + printf("direction %s state %s local %d remote %d\n", + siftr_dir_string[args[0]->direction], + tcp_state_string[args[0]->conn_state], + args[0]->tcp_localport, + args[0]->tcp_foreignport); + printf("snd_cwnd %d snd_wnd %d rcv_wnd %d snd_bwnd %d snd_ssthresh %d\n", + args[0]->snd_cwnd, + args[0]->snd_wnd, + args[0]->rcv_wnd, + args[0]->snd_bwnd, + args[0]->snd_ssthresh); + printf("\tmax_seg_size %u smoothed_rtt %d sack_enabled %d\n", + args[0]->max_seg_size, + args[0]->smoothed_rtt, + args[0]->sack_enabled); + printf("\tsnd_scale %d rcv_scale %d flags 0x%x rxt_length %d\n", + args[0]->snd_scale, + args[0]->rcv_scale, + args[0]->flags, + args[0]->rxt_length); + printf("\tsnd_buf_hiwater %u snd_buf_cc %u rcv_buf_hiwater %u\n", + args[0]->snd_buf_hiwater, + args[0]->snd_buf_cc, + args[0]->rcv_buf_hiwater); + printf("\trcv_buf_cc %u sent_inflight_bytes %u t_segqlen %d\n", + args[0]->rcv_buf_cc, + args[0]->sent_inflight_bytes, + args[0]->t_segqlen); + printf("\tflowid %u flowtype %u\n", + args[0]->flowid, + args[0]->flowtype); +}
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