diff options
Diffstat (limited to 'btt/trace.c')
| -rw-r--r-- | btt/trace.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/btt/trace.c b/btt/trace.c new file mode 100644 index 0000000..e18a887 --- /dev/null +++ b/btt/trace.c @@ -0,0 +1,105 @@ +/* + * 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); + } +} |