[blktrace.git] / btt / latency.c

/*
 * blktrace output analysis: generate a timeline & gather statistics
 *
 * Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
 *
 *  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 "globals.h"

static inline void latency_out(FILE *ofp, __u64 tstamp, __u64 latency)
{
	if (ofp)
		fprintf(ofp, "%lf %lf\n", TO_SEC(tstamp), TO_SEC(latency));
}

FILE *latency_open(__u32 device, char *name, char *post)
{
	FILE *fp = NULL;

	if (name) {
		int mjr, mnr;
		char oname[strlen(name) + 32];

		mjr = device >> MINORBITS;
		mnr = device & ((1 << MINORBITS) - 1);

		sprintf(oname, "%s_%03d,%03d_%s.dat", name, mjr, mnr, post);
		if ((fp = my_fopen(oname, "w")) == NULL)
			perror(oname);
		else
			add_file(fp, strdup(oname));
	}

	return fp;
}

void latency_alloc(struct d_info *dip)
{
	dip->q2d_ofp = latency_open(dip->device, q2d_name, "q2d");
	dip->d2c_ofp = latency_open(dip->device, d2c_name, "d2c");
	dip->q2c_ofp = latency_open(dip->device, q2c_name, "q2c");
}

void latency_q2d(struct d_info *dip, __u64 tstamp, __u64 latency)
{
	plat_x2c(dip->q2d_plat_handle, tstamp, latency);
	latency_out(dip->q2d_ofp, tstamp, latency);
}

void latency_d2c(struct d_info *dip, __u64 tstamp, __u64 latency)
{
	plat_x2c(dip->d2c_plat_handle, tstamp, latency);
	latency_out(dip->d2c_ofp, tstamp, latency);
}

void latency_q2c(struct d_info *dip, __u64 tstamp, __u64 latency)
{
	plat_x2c(dip->q2c_plat_handle, tstamp, latency);
	latency_out(dip->q2c_ofp, tstamp, latency);
}
Commit	Line	Data
b2ecdd0f ADB	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
b2ecdd0f ADB	23	static 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
	29	FILE latency_open(__u32 device, char name, char *post)
	30	{
c053af42	31	FILE *fp = NULL;
b2ecdd0f	32
c053af42 AB	33	if (name) {
	34	int mjr, mnr;
	35	char oname[strlen(name) + 32];
b2ecdd0f	36
c053af42 AB	37	mjr = device >> MINORBITS;
c053af42 AB	38	mnr = device & ((1 << MINORBITS) - 1);
b2ecdd0f	39
c053af42 AB	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	}
b2ecdd0f ADB	46
	47	return fp;
	48	}
	49
c053af42	50	void latency_alloc(struct d_info *dip)
b2ecdd0f	51	{
e47ada10	52	dip->q2d_ofp = latency_open(dip->device, q2d_name, "q2d");
b2ecdd0f ADB	53	dip->d2c_ofp = latency_open(dip->device, d2c_name, "d2c");
	54	dip->q2c_ofp = latency_open(dip->device, q2c_name, "q2c");
	55	}
	56
e47ada10 AB	57	void 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
b2ecdd0f ADB	63	void latency_d2c(struct d_info *dip, __u64 tstamp, __u64 latency)
b2ecdd0f ADB	64	{
2baef508	65	plat_x2c(dip->d2c_plat_handle, tstamp, latency);
b2ecdd0f ADB	66	latency_out(dip->d2c_ofp, tstamp, latency);
	67	}
	68
	69	void latency_q2c(struct d_info *dip, __u64 tstamp, __u64 latency)
	70	{
2baef508	71	plat_x2c(dip->q2c_plat_handle, tstamp, latency);
b2ecdd0f ADB	72	latency_out(dip->q2c_ofp, tstamp, latency);
b2ecdd0f ADB	73	}