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 struct bno_dump { 24 FILE *rfp, *wfp, *cfp; 25 }; 26 27 static FILE *bno_dump_open(__u32 device, char rwc) 28 { 29 FILE *fp; 30 char *oname; 31 int mjr, mnr; 32 33 mjr = device >> MINORBITS; 34 mnr = device & ((1 << MINORBITS) - 1); 35 36 oname = malloc(strlen(bno_dump_name) + 32); 37 sprintf(oname, "%s_%03d,%03d_%c.dat", bno_dump_name, mjr, mnr, rwc); 38 if ((fp = my_fopen(oname, "w")) == NULL) 39 perror(oname); 40 else 41 add_file(fp, oname); 42 return fp; 43 } 44 45 static inline void bno_dump_write(FILE *fp, struct io *iop) 46 { 47 fprintf(fp, "%15.9lf %lld %lld\n", BIT_TIME(iop->t.time), 48 (long long)BIT_START(iop), (long long)BIT_END(iop)); 49 } 50 51 void *bno_dump_alloc(__u32 device) 52 { 53 struct bno_dump *bdp; 54 55 if (bno_dump_name == NULL) return NULL; 56 57 bdp = malloc(sizeof(*bdp)); 58 bdp->rfp = bno_dump_open(device, 'r'); 59 bdp->wfp = bno_dump_open(device, 'w'); 60 bdp->cfp = bno_dump_open(device, 'c'); 61 62 return bdp; 63 } 64 65 void bno_dump_free(void *param) 66 { 67 free(param); 68 } 69 70 void bno_dump_add(void *handle, struct io *iop) 71 { 72 struct bno_dump *bdp = handle; 73 74 if (bdp) { 75 FILE *fp = IOP_READ(iop) ? bdp->rfp : bdp->wfp; 76 77 if (fp) 78 bno_dump_write(fp, iop); 79 if (bdp->cfp) 80 bno_dump_write(bdp->cfp, iop); 81 } 82 } 83
