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 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 __u64 d_time = (__u64)-1; 57 FILE *pit_fp = c_iop->dip->pit_fp; 58 59 update_blks(c_iop); 60 update_cregion(&all_regions, c_iop->t.time); 61 update_cregion(&c_iop->dip->regions, c_iop->t.time); 62 if (c_iop->pip) 63 update_cregion(&c_iop->pip->regions, c_iop->t.time); 64 aqd_complete(c_iop->dip->aqd_handle, BIT_TIME(c_iop->t.time)); 65 66 dip_foreach_list(c_iop, IOP_Q, &head); 67 list_for_each_safe(p, q, &head) { 68 struct io *q_iop = list_entry(p, struct io, f_head); 69 __u64 q2c = tdelta(q_iop->t.time, c_iop->t.time); 70 71 c_iop->bytes_left -= q_iop->t.bytes; 72 73 update_q2c(q_iop, q2c); 74 latency_q2c(q_iop->dip, q_iop->t.time, q2c); 75 76 if (q_iop->d_time != (__u64)-1) { 77 __u64 d2c = tdelta(q_iop->d_time, c_iop->t.time); 78 79 update_d2c(q_iop, d2c); 80 latency_d2c(q_iop->dip, c_iop->t.time, d2c); 81 iostat_complete(q_iop, c_iop); 82 83 d_time = q_iop->d_time; 84 } 85 86 if (per_io_ofp) { 87 q_iop->c_time = c_iop->t.time; 88 q_iop->c_sec = c_iop->t.sector; 89 q_iop->c_nsec = t_sec(&c_iop->t); 90 display_io_track(per_io_ofp, q_iop); 91 } 92 93 if (q_iop->dip->pit_fp) { 94 fprintf(pit_fp, "%d.%09lu ", 95 (int)SECONDS(q_iop->t.time), 96 (unsigned long)NANO_SECONDS(q_iop->t.time)); 97 } 98 99 list_del(&q_iop->f_head); 100 io_release(q_iop); 101 } 102 103 if (per_io_ofp) 104 fprintf(per_io_ofp, 105 "-----------------------------------------\n"); 106 107 if (c_iop->dip->pit_fp) { 108 fprintf(pit_fp, "| %d.%09lu | %d.%09lu\n", 109 (int)SECONDS(d_time), 110 (unsigned long)NANO_SECONDS(d_time), 111 (int)SECONDS(c_iop->t.time), 112 (unsigned long)NANO_SECONDS(c_iop->t.time)); 113 } 114 } 115 116 void trace_complete(struct io *c_iop) 117 { 118 if (c_iop->t.bytes == 0) 119 return; 120 121 if (io_setup(c_iop, IOP_C)) 122 handle_complete(c_iop); 123 124 io_release(c_iop); 125 } 126
