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108 lines
3.0 KiB
108 lines
3.0 KiB
/*
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* blktrace output analysis: generate a timeline & gather statistics
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*
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* Copyright (C) 2006 Alan D. Brunelle <Alan.Brunelle@hp.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "globals.h"
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static void __add_trace(struct io *iop)
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{
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time_t now = time(NULL);
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last_t_seen = BIT_TIME(iop->t.time);
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n_traces++;
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iostat_check_time(iop->t.time);
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if (verbose && ((now - last_vtrace) > 0)) {
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printf("%10lu t (%6.2lf%%)\r", n_traces, pct_done());
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if ((n_traces % 1000000) == 0) printf("\n");
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fflush(stdout);
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last_vtrace = now;
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}
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switch (iop->t.action & 0xffff) {
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case __BLK_TA_QUEUE: trace_queue(iop); break;
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case __BLK_TA_REMAP: trace_remap(iop); break;
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case __BLK_TA_INSERT: trace_insert(iop); break;
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case __BLK_TA_GETRQ: trace_getrq(iop); break;
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case __BLK_TA_BACKMERGE: trace_merge(iop); break;
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case __BLK_TA_FRONTMERGE: trace_merge(iop); break;
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case __BLK_TA_REQUEUE: trace_requeue(iop); break;
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case __BLK_TA_ISSUE: trace_issue(iop); break;
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case __BLK_TA_COMPLETE: trace_complete(iop); break;
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case __BLK_TA_PLUG: trace_plug(iop); break;
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case __BLK_TA_UNPLUG_IO: trace_unplug_io(iop); break;
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case __BLK_TA_UNPLUG_TIMER: trace_unplug_timer(iop); break;
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case __BLK_TA_SLEEPRQ: trace_sleeprq(iop); break;
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default:
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io_release(iop);
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return;
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}
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}
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static void trace_message(struct io *iop)
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{
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char scratch[15];
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char msg[iop->t.pdu_len + 1];
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if (!io_setup(iop, IOP_M))
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return;
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memcpy(msg, iop->pdu, iop->t.pdu_len);
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msg[iop->t.pdu_len] = '\0';
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fprintf(msgs_ofp, "%s %5d.%09lu %s\n",
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make_dev_hdr(scratch, 15, iop->dip, 1),
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(int)SECONDS(iop->t.time),
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(unsigned long)NANO_SECONDS(iop->t.time), msg);
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}
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void add_trace(struct io *iop)
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{
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if (iop->t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) {
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if (iop->t.action == BLK_TN_PROCESS) {
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if (iop->t.pid == 0)
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process_alloc(0, "kernel");
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else {
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char *slash = strchr(iop->pdu, '/');
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if (slash)
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*slash = '\0';
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process_alloc(iop->t.pid, iop->pdu);
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}
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} else if (iop->t.action == BLK_TN_MESSAGE)
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trace_message(iop);
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io_release(iop);
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} else if (iop->t.action & BLK_TC_ACT(BLK_TC_PC)) {
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io_release(iop);
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} else {
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if (time_bounded) {
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if (BIT_TIME(iop->t.time) < t_astart) {
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io_release(iop);
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return;
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} else if (BIT_TIME(iop->t.time) > t_aend) {
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io_release(iop);
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done = 1;
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return;
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}
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}
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__add_trace(iop);
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}
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}
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