diff options
Diffstat (limited to 'contrib/diskdevstat')
| -rwxr-xr-x | contrib/diskdevstat | 60 |
1 files changed, 55 insertions, 5 deletions
diff --git a/contrib/diskdevstat b/contrib/diskdevstat index 1c98fd5..3652555 100755 --- a/contrib/diskdevstat +++ b/contrib/diskdevstat @@ -2,6 +2,12 @@ # # diskdevstat: A simple systemtap script to record harddisk activity # of processes and display statistics for read/write operations +# +# Usage: diskdevstat [Update interval] [Total duration] [Display histogram at the end] +# +# Update interval and total duration are in seconds. Display histogram only requires a +# 3rd option to exist to be enabled. +# # Copyright (C) 2008, 2009 Red Hat, Inc. # Authors: Phil Knirsch # @@ -9,12 +15,12 @@ # 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 # @@ -23,7 +29,19 @@ # Boston, MA 02110-1301, USA. # -global ifavg, iflast +global ifavg, iflast, rtime, interval, duration, histogram + +probe begin +{ + rtime = 0; + interval = 5; + duration = 86400; + histogram = 0; + +%( $# > 0 %? interval = $1; %) +%( $# > 1 %? duration = $2; %) +%( $# > 2 %? histogram = 1; %) +} probe vfs.write { @@ -91,8 +109,40 @@ function print_activity() print("\n") } -probe timer.s(5), end, error +function print_histogram() +{ + foreach ([type, pid, dev, exec, uid] in ifavg-) { + nxmit = @count(ifavg[0, pid, dev, exec, uid]) + nrecv = @count(ifavg[1, pid, dev, exec, uid]) + if (type == 0 || nxmit == 0) { + printf("%5d %5d %-7s %-15s\n", pid, uid, dev, exec) + if (nxmit > 0) { + printf(" WRITE histogram\n") + print(@hist_log(ifavg[0, pid, dev, exec, uid])) + } + if (nrecv > 0) { + printf(" READ histogram\n") + print(@hist_log(ifavg[1, pid, dev, exec, uid])) + } + } + } +} + +probe timer.s(1) { - print_activity() + rtime = rtime + 1; + if (rtime % interval == 0) { + print_activity() + } + if (rtime >= duration) { + exit(); + } } +probe end, error +{ + if (histogram == 1) { + print_histogram(); + } + exit(); +} |