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 latency_out(FILE *ofp, __u64 tstamp, __u64 latency) 24 { 25 if (ofp) 26 fprintf(ofp, "%lf %lf\n", TO_SEC(tstamp), TO_SEC(latency)); 27 } 28 29 FILE *latency_open(__u32 device, char *name, char *post) 30 { 31 FILE *fp = NULL; 32 33 if (name) { 34 int mjr, mnr; 35 char oname[strlen(name) + 32]; 36 37 mjr = device >> MINORBITS; 38 mnr = device & ((1 << MINORBITS) - 1); 39 40 sprintf(oname, "%s_%03d,%03d_%s.dat", name, mjr, mnr, post); 41 if ((fp = my_fopen(oname, "w")) == NULL) 42 perror(oname); 43 else 44 add_file(fp, strdup(oname)); 45 } 46 47 return fp; 48 } 49 50 void latency_alloc(struct d_info *dip) 51 { 52 dip->q2d_ofp = latency_open(dip->device, q2d_name, "q2d"); 53 dip->d2c_ofp = latency_open(dip->device, d2c_name, "d2c"); 54 dip->q2c_ofp = latency_open(dip->device, q2c_name, "q2c"); 55 } 56 57 void latency_q2d(struct d_info *dip, __u64 tstamp, __u64 latency) 58 { 59 plat_x2c(dip->q2d_plat_handle, tstamp, latency); 60 latency_out(dip->q2d_ofp, tstamp, latency); 61 } 62 63 void latency_d2c(struct d_info *dip, __u64 tstamp, __u64 latency) 64 { 65 plat_x2c(dip->d2c_plat_handle, tstamp, latency); 66 latency_out(dip->d2c_ofp, tstamp, latency); 67 } 68 69 void latency_q2c(struct d_info *dip, __u64 tstamp, __u64 latency) 70 { 71 plat_x2c(dip->q2c_plat_handle, tstamp, latency); 72 latency_out(dip->q2c_ofp, tstamp, latency); 73 } 74
