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/*
* blktrace output analysis: generate a timeline & gather statistics
*
* (C) Copyright 2009 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 files {
FILE *fp;
char *nm;
};
struct rstat {
struct list_head head;
struct files files[2];
unsigned long long ios, nblks;
long long base_sec;
};
static struct rstat *sys_info;
static LIST_HEAD(rstats);
static int do_open(struct files *fip, char *bn, char *pn)
{
fip->nm = malloc(strlen(bn) + 16);
sprintf(fip->nm, "%s_%s.dat", bn, pn);
fip->fp = my_fopen(fip->nm, "w");
if (fip->fp) {
add_file(fip->fp, fip->nm);
return 0;
}
free(fip->nm);
return -1;
}
static int init_rsip(struct rstat *rsip, struct d_info *dip)
{
char *nm = dip ? dip->dip_name : "sys";
rsip->base_sec = -1;
rsip->ios = rsip->nblks = 0;
if (do_open(&rsip->files[0], nm, "iops_fp") ||
do_open(&rsip->files[1], nm, "mbps_fp"))
return -1;
list_add_tail(&rsip->head, &rstats);
return 0;
}
static void rstat_emit(struct rstat *rsip, double cur)
{
double mbps;
/*
* I/Os per second is easy: just the ios
*/
fprintf(rsip->files[0].fp, "%lld %llu\n", rsip->base_sec, rsip->ios);
/*
* MB/s we convert blocks to mb...
*/
mbps = ((double)rsip->nblks * 512.0) / (1024.0 * 1024.0);
fprintf(rsip->files[1].fp, "%lld %lf\n", rsip->base_sec, mbps);
rsip->base_sec = (unsigned long long)cur;
rsip->ios = rsip->nblks = 0;
}
static void __add(struct rstat *rsip, double cur, unsigned long long nblks)
{
if (rsip->base_sec < 0)
rsip->base_sec = (long long)cur;
else if (((long long)cur - rsip->base_sec) >= 1)
rstat_emit(rsip, cur);
rsip->ios++;
rsip->nblks += nblks;
}
void *rstat_alloc(struct d_info *dip)
{
struct rstat *rsip = malloc(sizeof(*rsip));
if (!init_rsip(rsip, dip))
return rsip;
free(rsip);
return NULL;
}
void rstat_free(void *ptr)
{
struct rstat *rsip = ptr;
rstat_emit(rsip, last_t_seen);
list_del(&rsip->head);
free(rsip);
}
void rstat_add(void *ptr, double cur, unsigned long long nblks)
{
if (ptr != NULL)
__add((struct rstat *)ptr, cur, nblks);
__add(sys_info, cur, nblks);
}
int rstat_init(void)
{
sys_info = rstat_alloc(NULL);
return sys_info != NULL;
}
void rstat_exit(void)
{
struct list_head *p, *q;
list_for_each_safe(p, q, &rstats) {
struct rstat *rsip = list_entry(p, struct rstat, head);
rstat_free(rsip);
}
}
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