1 /* 2 * blktrace output analysis: generate a timeline & gather statistics 3 * 4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle (at) 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 void handle_issue(struct io *d_iop) 24 { 25 LIST_HEAD(head); 26 struct list_head *p, *q; 27 28 if (d_iop->dip->n_act_q != 0) 29 d_iop->dip->n_act_q--; 30 31 seeki_add(d_iop->dip->seek_handle, d_iop); 32 bno_dump_add(d_iop->dip->bno_dump_handle, d_iop); 33 iostat_issue(d_iop); 34 d_iop->dip->n_ds++; 35 if (!remapper_dev(d_iop->t.device)) 36 update_d_histo(d_iop->t.bytes); 37 aqd_issue(d_iop->dip->aqd_handle, BIT_TIME(d_iop->t.time)); 38 39 dip_foreach_list(d_iop, IOP_Q, &head); 40 list_for_each_safe(p, q, &head) { 41 struct io *q_iop = list_entry(p, struct io, f_head); 42 43 if (q_iop->i_time != (__u64)-1) 44 update_i2d(q_iop, tdelta(q_iop->i_time, d_iop->t.time)); 45 else if (q_iop->m_time != (__u64)-1) 46 update_m2d(q_iop, tdelta(q_iop->m_time, d_iop->t.time)); 47 48 d_iop->bytes_left -= q_iop->t.bytes; 49 list_del(&q_iop->f_head); 50 51 q_iop->d_time = d_iop->t.time; 52 q_iop->d_sec = d_iop->t.sector; 53 q_iop->d_nsec = t_sec(&d_iop->t); 54 55 if (output_all_data) 56 q2d_histo_add(q_iop->dip->q2d_priv, 57 d_iop->t.time - q_iop->t.time); 58 latency_q2d(q_iop->dip, d_iop->t.time, 59 d_iop->t.time - q_iop->t.time); 60 } 61 } 62 63 void trace_issue(struct io *d_iop) 64 { 65 if (d_iop->t.bytes == 0) 66 return; 67 68 if (io_setup(d_iop, IOP_D)) 69 handle_issue(d_iop); 70 71 io_release(d_iop); 72 73 } 74
