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
38 #define N_HIST_BKTS 1025
40 #define BIT_TIME(t) ((double)SECONDS(t) + ((double)NANO_SECONDS(t) / 1.0e9))
42 #define BIT_START(iop) ((iop)->t.sector)
43 #define BIT_END(iop) ((iop)->t.sector + ((iop)->t.bytes >> 9))
44 #define IOP_READ(iop) ((iop)->t.action & BLK_TC_ACT(BLK_TC_READ))
45 #define IOP_RW(iop) (IOP_READ(iop) ? 1 : 0)
47 #define TO_SEC(nanosec) ((double)(nanosec) / 1.0e9)
48 #define TO_MSEC(nanosec) (1000.0 * TO_SEC(nanosec))
51 #define DBG_PING() dbg_ping()
52 #define ASSERT(truth) do { \
60 #define LIST_DEL(hp) list_del(hp)
64 #define LIST_DEL(hp) do { \
65 ASSERT((hp)->next != NULL); \
66 ASSERT(!list_empty(hp)); \
82 #define N_IOP_TYPES (IOP_I + 1)
85 struct file_info *next;
97 struct list_head head;
103 __u64 min, max, total;
111 struct avg_info q2a; /* Q to (A or X) */
112 struct avg_info q2i; /* Q to (I or M) */
113 struct avg_info i2d; /* (I or M) to D */
116 struct avg_info blks; /* Blocks transferred */
120 struct list_head head; /* on: qranges OR cranges */
125 struct list_head qranges;
126 struct list_head cranges;
130 struct region_info regions;
131 struct avgs_info avgs;
139 unsigned int host, bus, target, lun, irq, cpu;
141 char device[32], node[32], pci[32], devno[32];
145 __u64 rqm[2], ios[2], sec[2], wait, svctm;
146 double last_qu_change, last_dev_change, tot_qusz, idle_time;
147 int cur_qusz, cur_dev;
152 double rqm_s[2], ios_s[2], sec_s[2];
153 double avgrq_sz, avgqu_sz, await, svctm, p_util;
157 struct list_head all_head, hash_head;
159 struct region_info regions;
161 void *q2q_handle, *seek_handle, *bno_dump_handle, *unplug_hist_handle;
163 FILE *d2c_ofp, *q2c_ofp;
164 struct avgs_info avgs;
165 struct stats stats, all_stats;
166 __u64 last_q, n_qs, n_ds;
167 __u64 n_act_q, t_act_q; /* # currently active when Q comes in */
171 int is_plugged, nplugs, n_timer_unplugs;
172 double start_time, last_plug, plugged_time, end_time;
176 struct rb_node rb_node;
177 struct list_head f_head;
181 __u64 bytes_left, i_time, gm_time, d_time, c_time, d_sec, c_sec;
182 __u32 d_nsec, c_nsec;
184 struct blk_io_trace t;
186 int linked, is_getrq;
189 #if defined(COUNT_IOS)
190 struct list_head cio_head;
196 extern char bt_timeline_version[], *devices, *exes, *input_name, *output_name;
197 extern char *seek_name, *iostat_name, *d2c_name, *q2c_name, *per_io_name;
198 extern char *bno_dump_name, *unplug_hist_name;
199 extern double range_delta;
200 extern FILE *ranges_ofp, *avgs_ofp, *iostat_ofp, *per_io_ofp;
201 extern int verbose, done, time_bounded, output_all_data, seek_absolute;
202 extern unsigned int n_devs;
203 extern unsigned long n_traces;
204 extern struct list_head all_devs, all_procs;
205 extern struct avgs_info all_avgs;
207 extern struct region_info all_regions;
208 extern struct list_head free_ios;
209 extern __u64 iostat_interval, iostat_last_stamp;
210 extern time_t genesis, last_vtrace;
211 extern double t_astart, t_aend;
212 extern __u64 q_histo[N_HIST_BKTS], d_histo[N_HIST_BKTS];
214 extern int rb_tree_size;
216 #if defined(COUNT_IOS)
217 extern unsigned long nios_reused, nios_alloced, nios_freed;
218 extern struct list_head cios;
222 void handle_args(int argc, char *argv[]);
225 int dev_map_read(char *fname);
226 struct devmap *dev_map_find(__u32 device);
227 void dev_map_exit(void);
231 void dump_rb_trees(void);
233 void init_dev_heads(void);
234 struct d_info *dip_add(__u32 device, struct io *iop);
235 void dip_rem(struct io *iop);
236 struct d_info *__dip_find(__u32 device);
237 void dip_foreach_list(struct io *iop, enum iop_type type, struct list_head *hd);
238 void dip_foreach(struct io *iop, enum iop_type type,
239 void (*fnc)(struct io *iop, struct io *this), int rm_after);
240 struct io *dip_find_sec(struct d_info *dip, enum iop_type type, __u64 sec);
241 void dip_foreach_out(void (*func)(struct d_info *, void *), void *arg);
242 void dip_plug(__u32 dev, double cur_time);
243 void dip_unplug(__u32 dev, double cur_time, int is_timer);
247 int rb_insert(struct rb_root *root, struct io *iop);
248 struct io *rb_find_sec(struct rb_root *root, __u64 sec);
249 void rb_foreach(struct rb_node *n, struct io *iop,
250 void (*fnc)(struct io *iop, struct io *this),
251 struct list_head *head);
254 void iostat_init(void);
255 void iostat_getrq(struct io *iop);
256 void iostat_merge(struct io *iop);
257 void iostat_issue(struct io *iop);
258 void iostat_unissue(struct io *iop);
259 void iostat_complete(struct io *d_iop, struct io *c_iop);
260 void iostat_check_time(__u64 stamp);
261 void iostat_dump_stats(__u64 stamp, int all);
264 void latency_init(struct d_info *dip);
265 void latency_clean(void);
266 void latency_d2c(struct d_info *dip, __u64 tstamp, __u64 latency);
267 void latency_q2c(struct d_info *dip, __u64 tstamp, __u64 latency);
270 int in_devices(struct blk_io_trace *t);
271 void add_file(struct file_info **fipp, FILE *fp, char *oname);
272 void clean_files(struct file_info **fipp);
273 void add_buf(void *buf);
274 void clean_bufs(void);
278 void setup_ifile(char *fname);
279 void cleanup_ifile(void);
280 int next_trace(struct blk_io_trace *t, void **pdu);
283 int output_avgs(FILE *ofp);
284 int output_ranges(FILE *ofp);
285 char *make_dev_hdr(char *pad, size_t len, struct d_info *dip);
288 void add_process(__u32 pid, char *name);
289 struct p_info *find_process(__u32 pid, char *name);
290 void pip_update_q(struct io *iop);
291 void pip_foreach_out(void (*f)(struct p_info *, void *), void *arg);
295 void *bno_dump_init(__u32 device);
296 void bno_dump_exit(void *param);
297 void bno_dump_add(void *handle, struct io *iop);
298 void bno_dump_clean(void);
301 void q2d_histo_add(void *priv, __u64 q2d);
302 void *q2d_init(void);
303 void q2d_release(void *priv);
304 void q2d_display_header(FILE *fp);
305 void q2d_display_dashes(FILE *fp);
306 void q2d_display(FILE *fp, void *priv);
307 int q2d_ok(void *priv);
308 void q2d_acc(void *a1, void *a2);
311 void *seeki_init(char *str);
312 void seeki_exit(void *param);
313 void seek_clean(void);
314 void seeki_add(void *handle, struct io *iop);
315 double seeki_mean(void *handle);
316 long long seeki_nseeks(void *handle);
317 long long seeki_median(void *handle);
318 int seeki_mode(void *handle, struct mode *mp);
321 void add_trace(struct io *iop);
323 /* trace_complete.c */
324 void trace_complete(struct io *c_iop);
327 void run_im(struct io *im_iop, struct io *d_iop, struct io *c_iop);
328 void run_unim(struct io *im_iop, struct io *d_iop, struct io *c_iop);
329 int ready_im(struct io *im_iop, struct io *c_iop);
330 void trace_insert(struct io *i_iop);
331 void trace_merge(struct io *m_iop);
332 void trace_getrq(struct io *g_iop);
335 void run_issue(struct io *d_iop, struct io *u_iop, struct io *c_iop);
336 void run_unissue(struct io *d_iop, struct io *u_iop, struct io *c_iop);
337 int ready_issue(struct io *d_iop, struct io *c_iop);
338 void trace_issue(struct io *d_iop);
341 void trace_plug(struct io *p_iop);
342 void trace_unplug_io(struct io *u_iop);
343 void trace_unplug_timer(struct io *u_iop);
346 void run_queue(struct io *q_iop, struct io *u_iop, struct io *c_iop);
347 int ready_queue(struct io *q_iop, struct io *c_iop);
348 void trace_queue(struct io *q_iop);
351 void run_remap(struct io *a_iop, struct io *u_iop, struct io *c_iop);
352 int ready_remap(struct io *a_iop, struct io *c_iop);
353 void trace_remap(struct io *a_iop);
355 /* trace_requeue.c */
356 void trace_requeue(struct io *r_iop);
359 void *unplug_hist_init(__u32 device);
360 void unplug_hist_exit(void *arg);
361 void unplug_hist_add(struct io *u_iop);