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 void __run_issue(struct io *im_iop, struct io *d_iop, struct io *c_iop)
25 update_i2d(im_iop, tdelta(im_iop, d_iop));
26 run_im(im_iop, d_iop, c_iop);
30 static void __run_unissue(struct io *im_iop, struct io *d_iop,
33 unupdate_i2d(im_iop, tdelta(im_iop, d_iop));
34 run_unim(im_iop, d_iop, c_iop);
37 void run_issue(struct io *d_iop, __attribute__((__unused__))struct io *u_iop,
40 bilink_for_each_down(__run_issue, d_iop, c_iop, 1);
44 void run_unissue(struct io *d_iop,
45 __attribute__((__unused__))struct io *u_iop,
48 bilink_for_each_down(__run_unissue, d_iop, c_iop, 1);
52 int ready_issue(struct io *d_iop, struct io *c_iop)
54 if (d_iop->bytes_left > 0) {
57 struct list_head *p, *q;
59 dip_foreach_list(d_iop, IOP_I, &head);
60 dip_foreach_list(d_iop, IOP_M, &head);
61 list_for_each_safe(p, q, &head) {
62 im_iop = list_entry(p, struct io, f_head);
63 LIST_DEL(&im_iop->f_head);
65 ASSERT(d_iop->bytes_left >= im_iop->t.bytes);
66 if (ready_im(im_iop, c_iop)) {
67 bilink(im_iop, d_iop);
69 d_iop->bytes_left -= im_iop->t.bytes;
74 return d_iop->bytes_left == 0;
77 void trace_issue(struct io *d_iop)
79 if (io_setup(d_iop, IOP_D)) {
80 seeki_add(d_iop->dip->seek_handle, d_iop);
83 if (!remapper_dev(d_iop->t.device))
84 update_d_histo(d_iop->t.bytes);