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 __add_trace(struct io *iop)
25 time_t now = time(NULL);
28 iostat_check_time(iop->t.time);
30 if (verbose && ((now - last_vtrace) > 0)) {
33 printf("%10lu t\ttree size=|%10d|\r",
34 n_traces, rb_tree_size);
36 printf("%10lu t\r", n_traces);
39 if ((n_traces % 1000000) == 0) printf("\n");
44 switch (iop->t.action & 0xffff) {
45 case __BLK_TA_QUEUE: trace_queue(iop); break;
46 case __BLK_TA_REMAP: trace_remap(iop); break;
47 case __BLK_TA_INSERT: trace_insert(iop); break;
48 case __BLK_TA_GETRQ: trace_getrq(iop); break;
49 case __BLK_TA_BACKMERGE: trace_merge(iop); break;
50 case __BLK_TA_FRONTMERGE: trace_merge(iop); break;
51 case __BLK_TA_REQUEUE: trace_requeue(iop); break;
52 case __BLK_TA_ISSUE: trace_issue(iop); break;
53 case __BLK_TA_COMPLETE: trace_complete(iop); break;
54 case __BLK_TA_PLUG: trace_plug(iop); break;
55 case __BLK_TA_UNPLUG_IO: trace_unplug_io(iop); break;
56 case __BLK_TA_UNPLUG_TIMER: trace_unplug_timer(iop); break;
63 void add_trace(struct io *iop)
65 if (iop->t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) {
66 if (iop->t.action == BLK_TN_PROCESS) {
68 add_process(0, "kernel");
70 char *slash = strchr(iop->pdu, '/');
74 add_process(iop->t.pid, iop->pdu);
79 else if (iop->t.action & BLK_TC_ACT(BLK_TC_PC))
83 if (BIT_TIME(iop->t.time) < t_astart) {
87 else if (BIT_TIME(iop->t.time) > t_aend) {