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1655 giacomo 1
/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   Massimiliano Giorgi <massy@gandalf.sssup.it>
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 *   Luca Abeni          <luca@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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/*
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 * Copyright (C) 2000 Massimiliano Giorgi
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 * CVS :        $Id: wait.c,v 1.1.1.1 2004-05-24 18:03:44 giacomo Exp $
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 */
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#include <stdio.h>
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#include <stdlib.h>
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#include "types.h"
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#include <trace.h>
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#include "util.h"
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/* This demo computes the distribution of the wait times on disk requests */
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#define MAXX 37000
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#define PREC 37000
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#define DELTA ((double)MAXX/(double)PREC)
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#include "distr.c"
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int task;
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long a=-1;
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int waitfunc(trc_event_t *ev)
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{
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  if (event_class(ev->event)!=TRC_CLASS_USER) return 0;
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  if (ev->x.usr.n!=task) return 0;
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  if (ev->event==TRC_USER1) {
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    a=ev->time;
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    return 0;
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  }
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  if (ev->event==TRC_USER2) {
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    if (a!=-1) d_insert(ev->time-a);
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    a=-1;
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  }
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  return 0;
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}
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int main(int argc, char *argv[])
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{
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  FILE *fout;
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  int res;  
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  if (argc!=4) {
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    fprintf(stderr,"missing filename!\n");
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    return -1;
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  }
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  d_init();
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  task=atoi(argv[2]);
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  res=read_trace(argv[1],waitfunc);
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  if (res==0) {
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    fout=fopen(argv[3],"wt");
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    if (fout!=NULL) {
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      d_dump(fout);
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      fclose(fout);
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    } else
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      fprintf(stderr,"can't create output file!\n");
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  } else
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    fprintf(stderr,"read_trace error\n");
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  return 0;
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}