1/*
2 * blktrace output analysis: generate a timeline & gather statistics
3 *
4 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@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
23static 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
29FILE *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
50void 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
57void 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
63void 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
69void 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