1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
#!/usr/bin/sh
#
# fddist - file descriptor usage distributions.
# Written using DTrace (Solaris 10 3/05).
#
# This prints distributions for read and write events by file descriptor,
# by process. This can be used to determine which file descriptor a
# process is doing the most I/O with.
#
# $Id: fddist 3 2007-08-01 10:50:08Z brendan $
#
# USAGE: fddist [-r|-w] # hit Ctrl-C to end sample
#
# FIELDS:
# EXEC process name
# PID process ID
# value file descriptor
# count number of events
#
# BASED ON: /usr/demo/dtrace/lquantize.d
#
# SEE ALSO:
# DTrace Guide "Aggregations" chapter (docs.sun.com)
#
# PORTIONS: Copyright (c) 2005, 2006 Brendan Gregg.
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License"). You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at Docs/cddl1.txt
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# CDDL HEADER END
#
# 09-Jun-2005 Brendan Gregg Created this.
# 20-Apr-2006 " " Last update.
##############################
# --- Process Arguments ---
#
### Default variables
opt_read=0; opt_write=0
### Process options
while getopts hrw name
do
case $name in
r) opt_read=1 ;;
w) opt_write=1 ;;
h|?) cat <<-END >&2
USAGE: fddist [-r|-w]
-r # reads only
-w # writes only
eg,
fddist # default, r+w counts
fddist -r # read count only
END
exit 1
esac
done
shift `expr $OPTIND - 1`
### Option logic
if [ $opt_read -eq 0 -a $opt_write -eq 0 ]; then
opt_read=1; opt_write=1
fi
#################################
# --- Main Program, DTrace ---
#
/usr/sbin/dtrace -n '
#pragma D option quiet
inline int OPT_read = '$opt_read';
inline int OPT_write = '$opt_write';
inline int FDMAX = 255;
/* print header */
dtrace:::BEGIN
{
printf("Tracing ");
OPT_read && OPT_write ? printf("reads and writes") : 1;
OPT_read && ! OPT_write ? printf("reads") : 1;
! OPT_read && OPT_write ? printf("writes") : 1;
printf("... Hit Ctrl-C to end.\n");
}
/* sample reads */
syscall::*read*:entry
/OPT_read/
{
@Count[execname, pid] = lquantize(arg0, 0, FDMAX, 1);
}
/* sample writes */
syscall::*write*:entry
/OPT_write/
{
@Count[execname, pid] = lquantize(arg0, 0, FDMAX, 1);
}
/* print report */
dtrace:::END
{
printa("EXEC: %-16s PID: %d\n%@d\n",@Count);
}
'
|
