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/*
* 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(char *str)
{
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(str) + 32);
sprintf(oname, "%s.dat", str);
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;
}
}
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