[blktrace.git] / btt / trace.c

/*
 * 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);
	}
}
Commit	Line	Data
63eba147 JA	1	/*
	2	* blktrace output analysis: generate a timeline & gather statistics
	3	*
	4	* Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*
	20	*/
	21	#include "globals.h"
	22
095181f2	23	static void __add_trace(struct io *iop)
63eba147	24	{
6eb42155	25	time_t now = time(NULL);
63eba147	26
6eb42155	27	n_traces++;
21e47d90	28	iostat_check_time(iop->t.time);
6eb42155 ADB	29
6eb42155 ADB	30	if (verbose && ((now - last_vtrace) > 0)) {
32ff7e3b	31	printf("%10lu t (%6.2lf%%)\r", n_traces, pct_done());
63eba147	32	if ((n_traces % 1000000) == 0) printf("\n");
6eb42155 ADB	33	fflush(stdout);
6eb42155 ADB	34	last_vtrace = now;
63eba147 JA	35	}
	36
	37	switch (iop->t.action & 0xffff) {
095181f2 JA	38	case __BLK_TA_QUEUE: trace_queue(iop); break;
095181f2 JA	39	case __BLK_TA_REMAP: trace_remap(iop); break;
4c48f14e AB	40	case __BLK_TA_INSERT: trace_insert(iop); break;
4c48f14e AB	41	case __BLK_TA_GETRQ: trace_getrq(iop); break;
095181f2 JA	42	case __BLK_TA_BACKMERGE: trace_merge(iop); break;
	43	case __BLK_TA_FRONTMERGE: trace_merge(iop); break;
	44	case __BLK_TA_REQUEUE: trace_requeue(iop); break;
	45	case __BLK_TA_ISSUE: trace_issue(iop); break;
	46	case __BLK_TA_COMPLETE: trace_complete(iop); break;
b2822cea AB	47	case __BLK_TA_PLUG: trace_plug(iop); break;
	48	case __BLK_TA_UNPLUG_IO: trace_unplug_io(iop); break;
	49	case __BLK_TA_UNPLUG_TIMER: trace_unplug_timer(iop); break;
354db430	50	case __BLK_TA_SLEEPRQ: trace_sleeprq(iop); break;
8b10aae0 AB	51	default:
8b10aae0 AB	52	io_release(iop);
095181f2	53	return;
63eba147 JA	54	}
	55	}
	56
84a26fcd AB	57	static void trace_message(struct io *iop)
	58	{
	59	char scratch[15];
	60	char msg[iop->t.pdu_len + 1];
	61
	62	if (!io_setup(iop, IOP_M))
	63	return;
	64
	65	memcpy(msg, iop->pdu, iop->t.pdu_len);
	66	msg[iop->t.pdu_len] = '\0';
	67
	68	fprintf(msgs_ofp, "%s %5d.%09lu %s\n",
	69	make_dev_hdr(scratch, 15, iop->dip, 1),
	70	(int)SECONDS(iop->t.time),
	71	(unsigned long)NANO_SECONDS(iop->t.time), msg);
	72	}
	73
63eba147 JA	74	void add_trace(struct io *iop)
	75	{
	76	if (iop->t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) {
4c48f14e	77	if (iop->t.action == BLK_TN_PROCESS) {
8b10aae0	78	if (iop->t.pid == 0)
c053af42	79	process_alloc(0, "kernel");
4c48f14e AB	80	else {
	81	char *slash = strchr(iop->pdu, '/');
	82	if (slash)
	83	*slash = '\0';
	84
c053af42	85	process_alloc(iop->t.pid, iop->pdu);
4c48f14e	86	}
c053af42	87	} else if (iop->t.action == BLK_TN_MESSAGE)
84a26fcd	88	trace_message(iop);
6eb42155	89	io_release(iop);
c053af42	90	} else if (iop->t.action & BLK_TC_ACT(BLK_TC_PC)) {
6eb42155	91	io_release(iop);
c053af42	92	} else {
001b2633 JA	93	if (time_bounded) {
	94	if (BIT_TIME(iop->t.time) < t_astart) {
	95	io_release(iop);
	96	return;
c053af42	97	} else if (BIT_TIME(iop->t.time) > t_aend) {
001b2633 JA	98	io_release(iop);
	99	done = 1;
	100	return;
	101	}
	102	}
63eba147	103	__add_trace(iop);
001b2633	104	}
63eba147	105	}