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
__add_trace(struct io * iop)23 static void __add_trace(struct io *iop)
24 {
25 time_t now = time(NULL);
26
27 n_traces++;
28 iostat_check_time(iop->t.time);
29
30 if (verbose && ((now - last_vtrace) > 0)) {
31 printf("%10lu t (%6.2lf%%)\r", n_traces, pct_done());
32 if ((n_traces % 1000000) == 0) printf("\n");
33 fflush(stdout);
34 last_vtrace = now;
35 }
36
37 switch (iop->t.action & 0xffff) {
38 case __BLK_TA_QUEUE: trace_queue(iop); break;
39 case __BLK_TA_REMAP: trace_remap(iop); break;
40 case __BLK_TA_INSERT: trace_insert(iop); break;
41 case __BLK_TA_GETRQ: trace_getrq(iop); break;
42 case __BLK_TA_BACKMERGE: trace_merge(iop); break;
43 case __BLK_TA_FRONTMERGE: trace_merge(iop); break;
44 case __BLK_TA_REQUEUE: trace_requeue(iop); break;
45 case __BLK_TA_ISSUE: trace_issue(iop); break;
46 case __BLK_TA_COMPLETE: trace_complete(iop); break;
47 case __BLK_TA_PLUG: trace_plug(iop); break;
48 case __BLK_TA_UNPLUG_IO: trace_unplug_io(iop); break;
49 case __BLK_TA_UNPLUG_TIMER: trace_unplug_timer(iop); break;
50 case __BLK_TA_SLEEPRQ: trace_sleeprq(iop); break;
51 default:
52 io_release(iop);
53 return;
54 }
55 }
56
trace_message(struct io * iop)57 static void trace_message(struct io *iop)
58 {
59 char scratch[15];
60 char msg[iop->t.pdu_len + 1];
61
62 if (!io_setup(iop, IOP_M))
63 return;
64
65 memcpy(msg, iop->pdu, iop->t.pdu_len);
66 msg[iop->t.pdu_len] = '\0';
67
68 fprintf(msgs_ofp, "%s %5d.%09lu %s\n",
69 make_dev_hdr(scratch, 15, iop->dip, 1),
70 (int)SECONDS(iop->t.time),
71 (unsigned long)NANO_SECONDS(iop->t.time), msg);
72 }
73
add_trace(struct io * iop)74 void add_trace(struct io *iop)
75 {
76 if (iop->t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) {
77 if (iop->t.action == BLK_TN_PROCESS) {
78 if (iop->t.pid == 0)
79 process_alloc(0, "kernel");
80 else {
81 char *slash = strchr(iop->pdu, '/');
82 if (slash)
83 *slash = '\0';
84
85 process_alloc(iop->t.pid, iop->pdu);
86 }
87 } else if (iop->t.action == BLK_TN_MESSAGE)
88 trace_message(iop);
89 io_release(iop);
90 } else if (iop->t.action & BLK_TC_ACT(BLK_TC_PC)) {
91 io_release(iop);
92 } else {
93 if (time_bounded) {
94 if (BIT_TIME(iop->t.time) < t_astart) {
95 io_release(iop);
96 return;
97 } else if (BIT_TIME(iop->t.time) > t_aend) {
98 io_release(iop);
99 done = 1;
100 return;
101 }
102 }
103 __add_trace(iop);
104 }
105 }
106