btt/trace_complete.c

   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
  23 static inline void __out(FILE *ofp, __u64 tm, enum iop_type type,
  24                                         __u64 sec, __u32 nsec, int indent)
  25 {
  26         if (tm != (__u64)-1) {
  27                 if (indent)
  28                         fprintf(ofp, "         ");
  29                 fprintf(ofp, "%5d.%09lu %c %10llu+%-4u\n",
  30                         (int)SECONDS(tm), (unsigned long)NANO_SECONDS(tm),
  31                         type2c(type), (unsigned long long)sec, nsec);
  32         }
  33 }
  34
  35 static void display_io_track(FILE *ofp, struct io *iop)
  36 {
  37         fprintf(ofp, "%3d,%-3d: ", MAJOR(iop->t.device), MINOR(iop->t.device));
  38         __out(ofp, iop->t.time, IOP_Q, iop->t.sector, t_sec(&iop->t), 0);
  39
  40         if (iop->g_time != (__u64)-1)
  41                 __out(ofp, iop->g_time, IOP_G, iop->t.sector, t_sec(&iop->t),1);
  42         if (iop->i_time != (__u64)-1)
  43                 __out(ofp, iop->i_time, IOP_I, iop->t.sector, t_sec(&iop->t),1);
  44         if (iop->m_time != (__u64)-1)
  45                 __out(ofp, iop->m_time, IOP_M, iop->t.sector, t_sec(&iop->t),1);
  46
  47         __out(ofp, iop->d_time, IOP_D, iop->d_sec, iop->d_nsec, 1);
  48         __out(ofp, iop->c_time, IOP_C, iop->c_sec, iop->c_nsec, 1);
  49         fprintf(ofp, "\n");
  50 }
  51
  52 static void handle_complete(struct io *c_iop)
  53 {
  54         LIST_HEAD(head);
  55         struct list_head *p, *q;
  56
  57         update_blks(c_iop);
  58         update_cregion(&all_regions, c_iop->t.time);
  59         update_cregion(&c_iop->dip->regions, c_iop->t.time);
  60         if (c_iop->pip)
  61                 update_cregion(&c_iop->pip->regions, c_iop->t.time);
  62         aqd_complete(c_iop->dip->aqd_handle, BIT_TIME(c_iop->t.time));
  63
  64         dip_foreach_list(c_iop, IOP_Q, &head);
  65         list_for_each_safe(p, q, &head) {
  66                 struct io *q_iop = list_entry(p, struct io, f_head);
  67                 __u64 q2c = tdelta(q_iop->t.time, c_iop->t.time);
  68
  69                 c_iop->bytes_left -= q_iop->t.bytes;
  70
  71                 update_q2c(q_iop, q2c);
  72                 latency_q2c(q_iop->dip, q_iop->t.time, q2c);
  73
  74                 if (q_iop->d_time != (__u64)-1) {
  75                         __u64 d2c = tdelta(q_iop->d_time, c_iop->t.time);
  76
  77                         update_d2c(q_iop, d2c);
  78                         latency_d2c(q_iop->dip, c_iop->t.time, d2c);
  79                         iostat_complete(q_iop, c_iop);
  80                 }
  81
  82                 if (per_io_ofp) {
  83                         q_iop->c_time = c_iop->t.time;
  84                         q_iop->c_sec = c_iop->t.sector;
  85                         q_iop->c_nsec = t_sec(&c_iop->t);
  86                         display_io_track(per_io_ofp, q_iop);
  87                 }
  88
  89                 list_del(&q_iop->f_head);
  90                 io_release(q_iop);
  91         }
  92
  93         if (per_io_ofp)
  94                 fprintf(per_io_ofp,
  95                         "-----------------------------------------\n");
  96 }
  97
  98 void trace_complete(struct io *c_iop)
  99 {
 100         if (c_iop->t.bytes == 0)
 101                 return;
 102
 103         if (io_setup(c_iop, IOP_C))
 104                 handle_complete(c_iop);
 105
 106         io_release(c_iop);
 107 }