| #!/bin/bash |
| |
| # |
| # Copyright (C) 2007 Karel Zak <kzak@redhat.com> |
| # |
| # This file is part of util-linux-ng. |
| # |
| # This file 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 file 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. |
| # |
| TS_TOPDIR="$(dirname $0)/../.." |
| TS_DESC="mtab lock" |
| |
| . $TS_TOPDIR/functions.sh |
| ts_init "$*" |
| ts_skip_nonroot |
| |
| # |
| # Be careful with number of processes. Don't forget that there is time limit |
| # when the mount waits on the mtab lock. If you define too much processes some |
| # of them will fail with timeout. |
| # |
| # Note: the original version (< 2.13) of util-linux is completely useless for |
| # this test (maximum for this old version is NLOOPS=10 and NPROCESSES=5 (2-way |
| # 2GHz machine)). It has terrible performance due a bad timeouts implemntation |
| # in lock_mtab(). |
| # |
| NLOOPS=1000 |
| NPROCESSES=50 |
| |
| |
| > $TS_OUTPUT.debug |
| echo 0 > $TS_OUTPUT |
| SYNCTIME=$(( $(date +%s) + 10 )) |
| |
| for id in $(seq 0 $(( $NPROCESSES - 1 ))); do |
| $TS_CMD_MTABLOCK $id $SYNCTIME $TS_OUTPUT $NLOOPS >> $TS_OUTPUT.debug 2>&1 & |
| done |
| |
| wait |
| |
| ts_finalize |
| |
