Commit | Line | Data |
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63eba147 JA |
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 | ||
095181f2 JA |
23 | int dump_level; |
24 | LIST_HEAD(retries); | |
63eba147 | 25 | |
d76c5b81 | 26 | void __dump_iop(FILE *ofp, struct io *iop, int extra_nl) |
63eba147 | 27 | { |
d76c5b81 AB |
28 | fprintf(ofp, "%5d.%09lu %3d,%-3d %c %10llu+%-4u\n", |
29 | (int)SECONDS(iop->t.time), | |
30 | (unsigned long)NANO_SECONDS(iop->t.time), | |
31 | MAJOR(iop->t.device), MINOR(iop->t.device), type2c(iop->type), | |
32 | (unsigned long long)iop->t.sector, t_sec(&iop->t)); | |
33 | if (extra_nl) fprintf(ofp, "\n"); | |
63eba147 JA |
34 | } |
35 | ||
d76c5b81 | 36 | void __dump_iop2(FILE *ofp, struct io *a_iop, struct io *l_iop) |
63eba147 | 37 | { |
d76c5b81 AB |
38 | fprintf(ofp, "%5d.%09lu %3d,%-3d %c %10llu+%-4u <- (%3d,%-3d) %10llu\n", |
39 | (int)SECONDS(a_iop->t.time), | |
40 | (unsigned long)NANO_SECONDS(a_iop->t.time), | |
41 | MAJOR(a_iop->t.device), MINOR(a_iop->t.device), | |
42 | type2c(a_iop->type), (unsigned long long)a_iop->t.sector, | |
43 | t_sec(&a_iop->t), MAJOR(l_iop->t.device), | |
44 | MINOR(l_iop->t.device), (unsigned long long)l_iop->t.sector); | |
63eba147 JA |
45 | } |
46 | ||
d76c5b81 | 47 | void release_iops(struct list_head *rmhd) |
63eba147 | 48 | { |
095181f2 JA |
49 | struct io *x_iop; |
50 | struct list_head *p, *q; | |
51 | ||
d76c5b81 | 52 | list_for_each_safe(p, q, rmhd) { |
095181f2 JA |
53 | x_iop = list_entry(p, struct io, f_head); |
54 | LIST_DEL(&x_iop->f_head); | |
55 | io_release(x_iop); | |
56 | } | |
63eba147 JA |
57 | } |
58 | ||
d76c5b81 | 59 | void do_retries(__u64 now) |
63eba147 | 60 | { |
095181f2 JA |
61 | struct io *iop; |
62 | struct list_head *p, *q; | |
63 | ||
64 | list_for_each_safe(p, q, &retries) { | |
65 | iop = list_entry(p, struct io, retry); | |
d76c5b81 AB |
66 | ASSERT(iop->type == IOP_C); |
67 | ||
095181f2 | 68 | // iop could be gone after call... |
d76c5b81 | 69 | retry_complete(iop, now); |
63eba147 | 70 | } |
63eba147 JA |
71 | } |
72 | ||
d76c5b81 AB |
73 | static inline int retry_check_time(__u64 t) |
74 | { | |
75 | return next_retry_check && (t > next_retry_check); | |
76 | } | |
77 | ||
095181f2 | 78 | static void __add_trace(struct io *iop) |
63eba147 | 79 | { |
6eb42155 | 80 | time_t now = time(NULL); |
d76c5b81 AB |
81 | __u64 tstamp = iop->t.time; |
82 | int run_retry = retry_check_time(iop->t.time); | |
63eba147 | 83 | |
6eb42155 | 84 | n_traces++; |
21e47d90 | 85 | iostat_check_time(iop->t.time); |
6eb42155 ADB |
86 | |
87 | if (verbose && ((now - last_vtrace) > 0)) { | |
d76c5b81 AB |
88 | #if defined(DEBUG) |
89 | printf("%10lu t\tretries=|%10d|\ttree size=|%10d|\r", | |
90 | n_traces, list_len(&retries), rb_tree_size); | |
91 | #else | |
6eb42155 | 92 | printf("%10lu t\r", n_traces); |
d76c5b81 | 93 | #endif |
63eba147 | 94 | if ((n_traces % 1000000) == 0) printf("\n"); |
6eb42155 ADB |
95 | fflush(stdout); |
96 | last_vtrace = now; | |
63eba147 JA |
97 | } |
98 | ||
99 | switch (iop->t.action & 0xffff) { | |
095181f2 JA |
100 | case __BLK_TA_QUEUE: trace_queue(iop); break; |
101 | case __BLK_TA_REMAP: trace_remap(iop); break; | |
6dee1e20 | 102 | case __BLK_TA_GETRQ: trace_insert(iop); break; |
095181f2 JA |
103 | case __BLK_TA_BACKMERGE: trace_merge(iop); break; |
104 | case __BLK_TA_FRONTMERGE: trace_merge(iop); break; | |
105 | case __BLK_TA_REQUEUE: trace_requeue(iop); break; | |
106 | case __BLK_TA_ISSUE: trace_issue(iop); break; | |
107 | case __BLK_TA_COMPLETE: trace_complete(iop); break; | |
108 | default: | |
109 | io_release(iop); | |
110 | return; | |
63eba147 | 111 | } |
095181f2 | 112 | |
d76c5b81 AB |
113 | if (run_retry && !list_empty(&retries)) { |
114 | do_retries(tstamp); | |
115 | bump_retry(tstamp); | |
116 | } | |
63eba147 JA |
117 | } |
118 | ||
119 | void add_trace(struct io *iop) | |
120 | { | |
121 | if (iop->t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) { | |
d76c5b81 AB |
122 | if (iop->t.pid == 0) |
123 | add_process(0, "kernel"); | |
124 | else { | |
125 | char *slash = strchr(iop->pdu, '/'); | |
126 | if (slash) | |
127 | *slash = '\0'; | |
128 | ||
129 | add_process(iop->t.pid, iop->pdu); | |
130 | } | |
6eb42155 | 131 | io_release(iop); |
63eba147 | 132 | } |
f8d501e1 | 133 | else if (iop->t.action & BLK_TC_ACT(BLK_TC_PC)) |
6eb42155 | 134 | io_release(iop); |
001b2633 JA |
135 | else { |
136 | if (time_bounded) { | |
137 | if (BIT_TIME(iop->t.time) < t_astart) { | |
138 | io_release(iop); | |
139 | return; | |
140 | } | |
141 | else if (BIT_TIME(iop->t.time) > t_aend) { | |
142 | io_release(iop); | |
143 | done = 1; | |
144 | return; | |
145 | } | |
146 | } | |
63eba147 | 147 | __add_trace(iop); |
001b2633 | 148 | } |
63eba147 | 149 | } |