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/*
* 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 <stdio.h>
#include <string.h>
#include <unistd.h>
#include "globals.h"
char bt_timeline_version[] = "0.99";
char *devices, *exes, *input_name, *output_name, *seek_name;
char *d2c_name, *q2c_name, *per_io_name;
double range_delta = 0.1;
FILE *ranges_ofp, *avgs_ofp, *per_io_ofp;
int ifd, verbose = 0;
unsigned long n_traces;
struct avgs_info all_avgs;
__u64 last_q = (__u64)-1;
unsigned int n_devs;
time_t genesis, last_vtrace;
LIST_HEAD(all_devs);
LIST_HEAD(all_procs);
LIST_HEAD(free_ios);
struct region_info all_regions = {
.qranges = LIST_HEAD_INIT(all_regions.qranges),
.cranges = LIST_HEAD_INIT(all_regions.cranges),
.qr_cur = NULL,
.cr_cur = NULL
};
int process(void);
int main(int argc, char *argv[])
{
handle_args(argc, argv);
init_dev_heads();
iostat_init();
if (process() || output_avgs(avgs_ofp) || output_ranges(ranges_ofp))
return 1;
return 0;
}
int process(void)
{
int ret = 0;
struct blk_io_trace *t;
struct io *iop = io_alloc();
genesis = last_vtrace = time(NULL);
while (!do_read(ifd, &iop->t, sizeof(struct blk_io_trace))) {
t = convert_to_cpu(&iop->t);
if (t->pdu_len > 0) {
iop->pdu = malloc(t->pdu_len);
if (do_read(ifd, iop->pdu, t->pdu_len)) {
ret = 1;
break;
}
}
add_trace(iop);
iop = io_alloc();
}
io_release(iop);
if (iostat_ofp) {
fprintf(iostat_ofp, "\n");
iostat_dump_stats(iostat_last_stamp, 1);
}
seek_clean();
latency_clean();
if (verbose) {
double tps = (double)n_traces / (double)(time(NULL) - genesis);
printf("%10lu traces @ %.1lf Ktps\n", n_traces, tps/1000.0);
}
return ret;
}
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