/*

 * blktrace output analysis: generate a timeline & gather statistics

 *

 * (C) Copyright 2007 Hewlett-Packard Development Company, L.P.

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include "globals.h"

#define Q2D_MAX_HISTO 9

struct q2d_info {

	unsigned long nhistos;

	unsigned long histos[Q2D_MAX_HISTO + 1];

};

void q2d_histo_add(void *priv, __u64 q2d_in)

{

	int index;

	struct q2d_info *q2dp = priv;

	double q2d = BIT_TIME(q2d_in);

	long msec = (long)(q2d / 0.001);

	switch (msec) {

	default:          index = 9; break;

	case 500 ... 999: index = 8; break;

	case 250 ... 499: index = 7; break;

	case 100 ... 249: index = 6; break;

	case  75 ...  99: index = 5; break;

	case  50 ...  74: index = 4; break;

	case  25 ...  49: index = 3; break;

	case  10 ...  24: index = 2; break;

	case   5 ...   9: index = 1; break;

	case   0 ...   4: index = 0; break;

	}

	q2dp->histos[index]++;

	q2dp->nhistos++;

}

void *q2d_alloc(void)

{

	struct q2d_info *q2dp = malloc(sizeof(*q2dp));

	return memset(q2dp, 0, sizeof(*q2dp));

}

void q2d_free(void *priv)

{

	free(priv);

}

void q2d_display_header(FILE *fp)

{

	fprintf(fp, "%5s ", "<.005");

	fprintf(fp, "%5s ", "<.010");

	fprintf(fp, "%5s ", "<.025");

	fprintf(fp, "%5s ", "<.050");

	fprintf(fp, "%5s ", "<.075");

	fprintf(fp, "%5s ", "<.100");

	fprintf(fp, "%5s ", "<.250");

	fprintf(fp, "%5s ", "<.500");

	fprintf(fp, "%5s ", "< 1.0");

	fprintf(fp, "%5s ", ">=1.0\n");

}

void q2d_display_dashes(FILE *fp)

{

	int i;

	for (i = 0; i <= Q2D_MAX_HISTO; i++)

		fprintf(fp, "===== ");

	fprintf(fp, "\n");

}

void q2d_display(FILE *fp, void *priv)

{

	int i;

	struct q2d_info *q2dp = priv;

	double nh = (double)q2dp->nhistos;

	for (i = 0; i <= Q2D_MAX_HISTO; i++) {

		double p = 100.0 * (double)q2dp->histos[i] / nh;

		fprintf(fp, "%5.1lf ", p);

	}

	fprintf(fp, "\n");

}

int q2d_ok(void *priv)

{

	struct q2d_info *q2dp = priv;

	return q2dp && q2dp->nhistos > 0;

}

void q2d_acc(void *a1, void *a2)

{

	int i;

	struct q2d_info *ap = a1;

	struct q2d_info *tp = a2;

	for (i = 0; i <= Q2D_MAX_HISTO; i++)

		ap->histos[i] += tp->histos[i];

	ap->nhistos += tp->nhistos;

}