1/*
2 * blktrace output analysis: generate a timeline & gather statistics
3 *
4 * (C) Copyright 2007 Hewlett-Packard Development Company, L.P.
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 <stdio.h>
22#include <stdlib.h>
23#include <string.h>
24
25#include "globals.h"
26
27#define Q2D_MAX_HISTO 9
28struct q2d_info {
29	unsigned long nhistos;
30	unsigned long histos[Q2D_MAX_HISTO + 1];
31};
32
33void q2d_histo_add(void *priv, __u64 q2d_in)
34{
35	int index;
36	struct q2d_info *q2dp = priv;
37	double q2d = BIT_TIME(q2d_in);
38	long msec = (long)(q2d / 0.001);
39
40	switch (msec) {
41	default:          index = 9; break;
42	case 500 ... 999: index = 8; break;
43	case 250 ... 499: index = 7; break;
44	case 100 ... 249: index = 6; break;
45	case  75 ...  99: index = 5; break;
46	case  50 ...  74: index = 4; break;
47	case  25 ...  49: index = 3; break;
48	case  10 ...  24: index = 2; break;
49	case   5 ...   9: index = 1; break;
50	case   0 ...   4: index = 0; break;
51	}
52
53	q2dp->histos[index]++;
54	q2dp->nhistos++;
55}
56
57void *q2d_alloc(void)
58{
59	struct q2d_info *q2dp = malloc(sizeof(*q2dp));
60
61	return memset(q2dp, 0, sizeof(*q2dp));
62}
63
64void q2d_free(void *priv)
65{
66	free(priv);
67}
68
69void q2d_display_header(FILE *fp)
70{
71	fprintf(fp, "%5s ", "<.005");
72	fprintf(fp, "%5s ", "<.010");
73	fprintf(fp, "%5s ", "<.025");
74	fprintf(fp, "%5s ", "<.050");
75	fprintf(fp, "%5s ", "<.075");
76	fprintf(fp, "%5s ", "<.100");
77	fprintf(fp, "%5s ", "<.250");
78	fprintf(fp, "%5s ", "<.500");
79	fprintf(fp, "%5s ", "< 1.0");
80	fprintf(fp, "%5s ", ">=1.0\n");
81}
82
83void q2d_display_dashes(FILE *fp)
84{
85	int i;
86
87	for (i = 0; i <= Q2D_MAX_HISTO; i++)
88		fprintf(fp, "===== ");
89	fprintf(fp, "\n");
90}
91
92void q2d_display(FILE *fp, void *priv)
93{
94	int i;
95	struct q2d_info *q2dp = priv;
96	double nh = (double)q2dp->nhistos;
97
98	for (i = 0; i <= Q2D_MAX_HISTO; i++) {
99		double p = 100.0 * (double)q2dp->histos[i] / nh;
100		fprintf(fp, "%5.1lf ", p);
101	}
102	fprintf(fp, "\n");
103}
104
105int q2d_ok(void *priv)
106{
107	struct q2d_info *q2dp = priv;
108
109	return q2dp && q2dp->nhistos > 0;
110}
111
112void q2d_acc(void *a1, void *a2)
113{
114	int i;
115	struct q2d_info *ap = a1;
116	struct q2d_info *tp = a2;
117
118	for (i = 0; i <= Q2D_MAX_HISTO; i++)
119		ap->histos[i] += tp->histos[i];
120	ap->nhistos += tp->nhistos;
121}
122