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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 "globals.h"
static void __add_trace(struct io *iop)
{
time_t now = time(NULL);
n_traces++;
iostat_check_time(iop->t.time);
if (verbose && ((now - last_vtrace) > 0)) {
printf("%10lu t (%6.2lf%%)\r", n_traces, pct_done());
if ((n_traces % 1000000) == 0) printf("\n");
fflush(stdout);
last_vtrace = now;
}
switch (iop->t.action & 0xffff) {
case __BLK_TA_QUEUE: trace_queue(iop); break;
case __BLK_TA_REMAP: trace_remap(iop); break;
case __BLK_TA_INSERT: trace_insert(iop); break;
case __BLK_TA_GETRQ: trace_getrq(iop); break;
case __BLK_TA_BACKMERGE: trace_merge(iop); break;
case __BLK_TA_FRONTMERGE: trace_merge(iop); break;
case __BLK_TA_REQUEUE: trace_requeue(iop); break;
case __BLK_TA_ISSUE: trace_issue(iop); break;
case __BLK_TA_COMPLETE: trace_complete(iop); break;
case __BLK_TA_PLUG: trace_plug(iop); break;
case __BLK_TA_UNPLUG_IO: trace_unplug_io(iop); break;
case __BLK_TA_UNPLUG_TIMER: trace_unplug_timer(iop); break;
case __BLK_TA_SLEEPRQ: trace_sleeprq(iop); break;
default:
io_release(iop);
return;
}
}
static void trace_message(struct io *iop)
{
char scratch[15];
char msg[iop->t.pdu_len + 1];
if (!io_setup(iop, IOP_M))
return;
memcpy(msg, iop->pdu, iop->t.pdu_len);
msg[iop->t.pdu_len] = '\0';
fprintf(msgs_ofp, "%s %5d.%09lu %s\n",
make_dev_hdr(scratch, 15, iop->dip, 1),
(int)SECONDS(iop->t.time),
(unsigned long)NANO_SECONDS(iop->t.time), msg);
}
void add_trace(struct io *iop)
{
if (iop->t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) {
if (iop->t.action == BLK_TN_PROCESS) {
if (iop->t.pid == 0)
process_alloc(0, "kernel");
else {
char *slash = strchr(iop->pdu, '/');
if (slash)
*slash = '\0';
process_alloc(iop->t.pid, iop->pdu);
}
} else if (iop->t.action == BLK_TN_MESSAGE)
trace_message(iop);
io_release(iop);
} else if (iop->t.action & BLK_TC_ACT(BLK_TC_PC)) {
io_release(iop);
} else {
if (time_bounded) {
if (BIT_TIME(iop->t.time) < t_astart) {
io_release(iop);
return;
} else if (BIT_TIME(iop->t.time) > t_aend) {
io_release(iop);
done = 1;
return;
}
}
__add_trace(iop);
}
}
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