1e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat/* 2e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * blktrace output analysis: generate a timeline & gather statistics 3e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * 4e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com> 5e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * 6e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * This program is free software; you can redistribute it and/or modify 7e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * it under the terms of the GNU General Public License as published by 8e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * the Free Software Foundation; either version 2 of the License, or 9e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * (at your option) any later version. 10e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * 11e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * This program is distributed in the hope that it will be useful, 12e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * but WITHOUT ANY WARRANTY; without even the implied warranty of 13e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * GNU General Public License for more details. 15e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * 16e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * You should have received a copy of the GNU General Public License 17e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * along with this program; if not, write to the Free Software 18e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat * 20e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat */ 21e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat#include "globals.h" 22e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 23e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat#define BKT_WIDTH 5 24e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat#define MAX_BKT 19 25e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat#define EXCESS_BKT 20 26e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat#define NBKTS (EXCESS_BKT + 1) 27e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 28e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehatstruct hist_bkt { 29e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat __u32 dev; 30e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat int hist[NBKTS * sizeof(int)]; 31e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat}; 32e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 33e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehatvoid *unplug_hist_alloc(__u32 device) 34e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat{ 35e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat struct hist_bkt *hbp; 36e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 37e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat if (unplug_hist_name == NULL) return NULL; 38e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 39e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat hbp = malloc(sizeof(*hbp)); 40e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat hbp->dev = device; 41e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat memset(hbp->hist, 0, NBKTS * sizeof(int)); 42e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 43e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat return hbp; 44e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat} 45e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 46e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehatvoid unplug_hist_add(struct io *u_iop) 47e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat{ 48e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat struct d_info *dip; 49e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 50e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat dip = __dip_find(u_iop->t.device); 51e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat if (dip && dip->up_hist_handle) { 52e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat __u64 *val = u_iop->pdu; 53e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat int idx, n_unplugs = be64_to_cpu(*val); 54e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat struct hist_bkt *hbp = dip->up_hist_handle; 55e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 56e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat idx = (n_unplugs / BKT_WIDTH); 57e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat if (idx > EXCESS_BKT) 58e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat idx = EXCESS_BKT; 59e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 60e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat hbp->hist[idx]++; 61e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat } 62e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat} 63e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 64e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehatvoid unplug_hist_free(void *arg) 65e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat{ 66e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat if (arg) { 67e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat FILE *fp; 68e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat struct hist_bkt *hbp = arg; 69e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat int mjr = hbp->dev >> MINORBITS; 70e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat int mnr = hbp->dev & ((1 << MINORBITS) - 1); 71e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat char *oname = malloc(strlen(unplug_hist_name) + 32); 72e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 73e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat sprintf(oname, "%s_%03d,%03d.dat", unplug_hist_name, mjr, mnr); 74e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat if ((fp = my_fopen(oname, "w")) != NULL) { 75e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat int i; 76e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 77e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat for (i = 0; i < NBKTS; i++) 78e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat fprintf(fp, "%d %d\n", i, hbp->hist[i]); 79e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat fclose(fp); 80e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 81e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat } else 82e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat perror(oname); 83e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat 84e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat free(oname); 85e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat free(hbp); 86e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat } 87e20e1347b9914aa05e30548c15d7cd5e412cc0e2San Mehat} 88