[blktrace.git] / btt / plat.c

/*
 * blktrace output analysis: generate a timeline & gather statistics
 *
 * (C) Copyright 2008 Hewlett-Packard Development Company, L.P.
 * 	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"

struct plat_info {
	long nl;
	FILE *fp;
	double first_ts, last_ts, tl;
};

void *plat_alloc(struct d_info *dip, char *post)
{
	char *oname;
	struct plat_info *pp;

	if (plat_freq <= 0.0) return NULL;

	pp = malloc(sizeof(*pp));
	pp->nl = 0;
	pp->first_ts = pp->last_ts = pp->tl = -1.0;

	oname = malloc(strlen(dip->dip_name) + strlen(post) + 32);
	sprintf(oname, "%s%s_plat.dat", dip->dip_name, post);
	if ((pp->fp = my_fopen(oname, "w")) == NULL) {
		perror(oname);
		return NULL;
	}
	add_file(pp->fp, oname);

	return pp;
}

void plat_free(void *info)
{
	struct plat_info *pp = info;

	if (pp == NULL) return;

	if (pp->first_ts != -1.0) {
		double delta = pp->last_ts - pp->first_ts;

		fprintf(pp->fp, "%lf %lf\n",
			pp->first_ts + (delta / 2), pp->tl / pp->nl);
	}
	free(info);
}

void plat_x2c(void *info, __u64 ts, __u64 latency)
{
	double now = TO_SEC(ts);
	double lat = TO_SEC(latency);
	struct plat_info *pp = info;

	if (pp == NULL) return;

	if (pp->first_ts == -1.0) {
		pp->first_ts = pp->last_ts = now;
		pp->nl = 1;
		pp->tl = lat;
	} else if ((now - pp->first_ts) >= plat_freq) {
		double delta = pp->last_ts - pp->first_ts;

		fprintf(pp->fp, "%lf %lf\n",
			pp->first_ts + (delta / 2), pp->tl / pp->nl);

		pp->first_ts = pp->last_ts = now;
		pp->nl = 1;
		pp->tl = lat;
	} else {
		pp->last_ts = now;
		pp->nl += 1;
		pp->tl += lat;
	}
}
Commit	Line	Data
2baef508 AB	1	/*
	2	* blktrace output analysis: generate a timeline & gather statistics
	3	*
	4	* (C) Copyright 2008 Hewlett-Packard Development Company, L.P.
	5	* Alan D. Brunelle <alan.brunelle@hp.com>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	*/
	22	#include "globals.h"
	23
	24	struct plat_info {
	25	long nl;
	26	FILE *fp;
	27	double first_ts, last_ts, tl;
	28	};
	29
a155ab98	30	void plat_alloc(struct d_info dip, char *post)
2baef508 AB	31	{
	32	char *oname;
	33	struct plat_info *pp;
	34
	35	if (plat_freq <= 0.0) return NULL;
	36
	37	pp = malloc(sizeof(*pp));
	38	pp->nl = 0;
	39	pp->first_ts = pp->last_ts = pp->tl = -1.0;
	40
a155ab98 AB	41	oname = malloc(strlen(dip->dip_name) + strlen(post) + 32);
a155ab98 AB	42	sprintf(oname, "%s%s_plat.dat", dip->dip_name, post);
99bb5ebc	43	if ((pp->fp = my_fopen(oname, "w")) == NULL) {
2baef508 AB	44	perror(oname);
	45	return NULL;
	46	}
c053af42	47	add_file(pp->fp, oname);
2baef508 AB	48
	49	return pp;
	50	}
	51
c053af42	52	void plat_free(void *info)
2baef508 AB	53	{
	54	struct plat_info *pp = info;
	55
	56	if (pp == NULL) return;
	57
	58	if (pp->first_ts != -1.0) {
	59	double delta = pp->last_ts - pp->first_ts;
	60
	61	fprintf(pp->fp, "%lf %lf\n",
	62	pp->first_ts + (delta / 2), pp->tl / pp->nl);
	63	}
	64	free(info);
	65	}
	66
2baef508 AB	67	void plat_x2c(void *info, __u64 ts, __u64 latency)
	68	{
	69	double now = TO_SEC(ts);
	70	double lat = TO_SEC(latency);
	71	struct plat_info *pp = info;
	72
	73	if (pp == NULL) return;
	74
	75	if (pp->first_ts == -1.0) {
	76	pp->first_ts = pp->last_ts = now;
	77	pp->nl = 1;
	78	pp->tl = lat;
c053af42	79	} else if ((now - pp->first_ts) >= plat_freq) {
2baef508 AB	80	double delta = pp->last_ts - pp->first_ts;
	81
	82	fprintf(pp->fp, "%lf %lf\n",
	83	pp->first_ts + (delta / 2), pp->tl / pp->nl);
	84
	85	pp->first_ts = pp->last_ts = now;
	86	pp->nl = 1;
	87	pp->tl = lat;
c053af42	88	} else {
2baef508 AB	89	pp->last_ts = now;
	90	pp->nl += 1;
	91	pp->tl += lat;
	92	}
	93	}