1 /* 2 * blktrace output analysis: generate a timeline & gather statistics 3 * 4 * (C) Copyright 2008 Hewlett-Packard Development Company, L.P. 5 * Alan D. Brunelle <alan.brunelle (at) hp.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 20 * 21 */ 22 #include "globals.h" 23 24 struct plat_info { 25 long nl; 26 FILE *fp; 27 double first_ts, last_ts, tl; 28 }; 29 30 void *plat_alloc(char *str) 31 { 32 char *oname; 33 struct plat_info *pp; 34 35 if (plat_freq <= 0.0) return NULL; 36 37 pp = malloc(sizeof(*pp)); 38 pp->nl = 0; 39 pp->first_ts = pp->last_ts = pp->tl = -1.0; 40 41 oname = malloc(strlen(str) + 32); 42 sprintf(oname, "%s.dat", str); 43 if ((pp->fp = my_fopen(oname, "w")) == NULL) { 44 perror(oname); 45 return NULL; 46 } 47 add_file(pp->fp, oname); 48 49 return pp; 50 } 51 52 void plat_free(void *info) 53 { 54 struct plat_info *pp = info; 55 56 if (pp == NULL) return; 57 58 if (pp->first_ts != -1.0) { 59 double delta = pp->last_ts - pp->first_ts; 60 61 fprintf(pp->fp, "%lf %lf\n", 62 pp->first_ts + (delta / 2), pp->tl / pp->nl); 63 } 64 free(info); 65 } 66 67 void plat_x2c(void *info, __u64 ts, __u64 latency) 68 { 69 double now = TO_SEC(ts); 70 double lat = TO_SEC(latency); 71 struct plat_info *pp = info; 72 73 if (pp == NULL) return; 74 75 if (pp->first_ts == -1.0) { 76 pp->first_ts = pp->last_ts = now; 77 pp->nl = 1; 78 pp->tl = lat; 79 } else if ((now - pp->first_ts) >= plat_freq) { 80 double delta = pp->last_ts - pp->first_ts; 81 82 fprintf(pp->fp, "%lf %lf\n", 83 pp->first_ts + (delta / 2), pp->tl / pp->nl); 84 85 pp->first_ts = pp->last_ts = now; 86 pp->nl = 1; 87 pp->tl = lat; 88 } else { 89 pp->last_ts = now; 90 pp->nl += 1; 91 pp->tl += lat; 92 } 93 } 94
