2 * blktrace output analysis: generate a timeline & gather statistics
4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
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.
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.
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
23 static inline void __update_q2c(struct io *q_iop, struct io *c_iop)
25 __u64 q2c = tdelta(q_iop, c_iop);
27 update_q2c(q_iop, q2c);
28 latency_q2c(q_iop->dip, q_iop->t.time, q2c);
31 void run_queue(struct io *q_iop, struct io *c_iop, struct list_head *rmhd)
34 struct io *a_iop = bilink_first_down(q_iop, &blp);
37 run_remap(a_iop, c_iop, rmhd);
41 __update_q2c(q_iop, c_iop);
44 list_add_tail(&q_iop->f_head, rmhd);
47 int ready_queue(struct io *q_iop, struct io *c_iop)
51 if (!list_empty(&q_iop->down_list))
54 a_iop = dip_find_sec(q_iop->dip, IOP_A, BIT_START(q_iop));
58 if (!ready_remap(a_iop, c_iop))
61 ASSERT(q_iop->t.bytes == a_iop->t.bytes);
67 void trace_queue(struct io *q_iop)
69 if (io_setup(q_iop, IOP_Q)) {
70 update_lq(&last_q, &all_avgs.q2q, q_iop->t.time);
71 update_qregion(&all_regions, q_iop->t.time);
72 dip_update_q(q_iop->dip, q_iop);