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_g(struct io *g_iop) 24 { 25 struct io *q_iop; 26 27 iostat_getrq(g_iop); 28 29 q_iop = dip_find_sec(g_iop->dip, IOP_Q, g_iop->t.sector); 30 if (q_iop) { 31 q_iop->g_time = g_iop->t.time; 32 update_q2g(q_iop, tdelta(q_iop->t.time, g_iop->t.time)); 33 if (q_iop->s_time != 0) 34 update_s2g(q_iop, tdelta(q_iop->s_time, g_iop->t.time)); 35 } 36 } 37 38 static void handle_s(struct io *s_iop) 39 { 40 struct io *q_iop = dip_find_sec(s_iop->dip, IOP_Q, s_iop->t.sector); 41 42 if (q_iop) 43 q_iop->s_time = s_iop->t.time; 44 } 45 46 static void handle_i(struct io *i_iop) 47 { 48 struct io *q_iop = dip_find_sec(i_iop->dip, IOP_Q, i_iop->t.sector); 49 50 if (q_iop) { 51 q_iop->i_time = i_iop->t.time; 52 if (q_iop->g_time != (__u64)-1) 53 update_g2i(q_iop, tdelta(q_iop->g_time, i_iop->t.time)); 54 } 55 } 56 57 static void handle_m(struct io *m_iop) 58 { 59 struct io *q_iop; 60 61 iostat_merge(m_iop); 62 63 q_iop = dip_find_sec(m_iop->dip, IOP_Q, m_iop->t.sector); 64 if (q_iop) { 65 q_iop->m_time = m_iop->t.time; 66 update_q2m(q_iop, tdelta(q_iop->t.time, m_iop->t.time)); 67 } 68 69 if (m_iop->dip->n_act_q != 0) 70 m_iop->dip->n_act_q--; 71 } 72 73 void trace_sleeprq(struct io *s_iop) 74 { 75 if (s_iop->t.bytes == 0) 76 return; 77 if (io_setup(s_iop, IOP_S)) 78 handle_s(s_iop); 79 io_release(s_iop); 80 } 81 82 void trace_getrq(struct io *g_iop) 83 { 84 if (g_iop->t.bytes == 0) 85 return; 86 if (io_setup(g_iop, IOP_G)) 87 handle_g(g_iop); 88 io_release(g_iop); 89 } 90 91 void trace_insert(struct io *i_iop) 92 { 93 if (i_iop->t.bytes == 0) 94 return; 95 if (io_setup(i_iop, IOP_I)) 96 handle_i(i_iop); 97 io_release(i_iop); 98 } 99 100 void trace_merge(struct io *m_iop) 101 { 102 if (m_iop->t.bytes == 0) 103 return; 104 if (io_setup(m_iop, IOP_M)) 105 handle_m(m_iop); 106 io_release(m_iop); 107 } 108
