1/*
2 * blktrace output analysis: generate a timeline & gather statistics
3 *
4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
5 *
6 *  This program is free software; you can redistribute it and/or modify
7 *  it under the terms of the GNU General Public License as published by
8 *  the Free Software Foundation; either version 2 of the License, or
9 *  (at your option) any later version.
10 *
11 *  This program is distributed in the hope that it will be useful,
12 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14 *  GNU General Public License for more details.
15 *
16 *  You should have received a copy of the GNU General Public License
17 *  along with this program; if not, write to the Free Software
18 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19 *
20 */
21#include "globals.h"
22
23static void handle_issue(struct io *d_iop)
24{
25	LIST_HEAD(head);
26	struct list_head *p, *q;
27
28	if (d_iop->dip->n_act_q != 0)
29		d_iop->dip->n_act_q--;
30
31	seeki_add(d_iop->dip->seek_handle, d_iop);
32	bno_dump_add(d_iop->dip->bno_dump_handle, d_iop);
33	iostat_issue(d_iop);
34	d_iop->dip->n_ds++;
35	if (!remapper_dev(d_iop->t.device))
36		update_d_histo(d_iop->t.bytes);
37	aqd_issue(d_iop->dip->aqd_handle, BIT_TIME(d_iop->t.time));
38
39	dip_foreach_list(d_iop, IOP_Q, &head);
40	list_for_each_safe(p, q, &head) {
41		struct io *q_iop = list_entry(p, struct io, f_head);
42
43		if (q_iop->i_time != (__u64)-1)
44			update_i2d(q_iop, tdelta(q_iop->i_time, d_iop->t.time));
45		else if (q_iop->m_time != (__u64)-1)
46			update_m2d(q_iop, tdelta(q_iop->m_time, d_iop->t.time));
47
48		d_iop->bytes_left -= q_iop->t.bytes;
49		list_del(&q_iop->f_head);
50
51		q_iop->d_time = d_iop->t.time;
52		q_iop->d_sec = d_iop->t.sector;
53		q_iop->d_nsec = t_sec(&d_iop->t);
54
55		if (output_all_data)
56			q2d_histo_add(q_iop->dip->q2d_priv,
57						d_iop->t.time - q_iop->t.time);
58		latency_q2d(q_iop->dip, d_iop->t.time,
59						d_iop->t.time - q_iop->t.time);
60	}
61}
62
63void trace_issue(struct io *d_iop)
64{
65	if (d_iop->t.bytes == 0)
66		return;
67
68	if (io_setup(d_iop, IOP_D))
69		handle_issue(d_iop);
70
71	io_release(d_iop);
72
73}
74