1#!/bin/ksh -p
2#
3# CDDL HEADER START
4#
5# The contents of this file are subject to the terms of the
6# Common Development and Distribution License (the "License").
7# You may not use this file except in compliance with the License.
8#
9# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10# or http://www.opensolaris.org/os/licensing.
11# See the License for the specific language governing permissions
12# and limitations under the License.
13#
14# When distributing Covered Code, include this CDDL HEADER in each
15# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16# If applicable, add the following below this CDDL HEADER, with the
17# fields enclosed by brackets "[]" replaced with your own identifying
18# information: Portions Copyright [yyyy] [name of copyright owner]
19#
20# CDDL HEADER END
21#
22
23#
24# Copyright (c) 2017, Lawrence Livermore National Security, LLC.
25#
26
27. $STF_SUITE/include/libtest.shlib
28. $STF_SUITE/include/math.shlib
29
30#
31# DESCRIPTION:
32# Ensure stats presented in /proc/spl/kstat/zfs/dbufstats are correct
33# based on /proc/spl/kstat/zfs/dbufs.
34#
35# STRATEGY:
36# 1. Generate a file with random data in it
37# 2. Store output from dbufs kstat
38# 3. Store output from dbufstats kstat
39# 4. Compare stats presented in dbufstats with stat generated using
40#    dbufstat and the dbufs kstat output
41#
42
43DBUFSTATS_FILE=$(mktemp $TEST_BASE_DIR/dbufstats.out.XXXXXX)
44DBUFS_FILE=$(mktemp $TEST_BASE_DIR/dbufs.out.XXXXXX)
45
46function cleanup
47{
48	log_must rm -f $TESTDIR/file $DBUFS_FILE $DBUFSTATS_FILE
49}
50
51function testdbufstat # stat_name dbufstat_filter
52{
53        name=$1
54        filter=""
55
56        [[ -n "$2" ]] && filter="-F $2"
57
58	if is_linux; then
59		from_dbufstat=$(grep -w "$name" "$DBUFSTATS_FILE" |
60		    awk '{ print $3 }')
61	else
62		from_dbufstat=$(awk "/dbufstats\.$name:/ { print \$2 }" \
63		    "$DBUFSTATS_FILE")
64	fi
65	from_dbufs=$(dbufstat -bxn -i "$DBUFS_FILE" "$filter" | wc -l)
66
67	within_tolerance $from_dbufstat $from_dbufs 15 \
68	    || log_fail "Stat $name exceeded tolerance"
69}
70
71verify_runnable "both"
72
73log_assert "dbufstats produces correct statistics"
74
75log_onexit cleanup
76
77log_must file_write -o create -f "$TESTDIR/file" -b 1048576 -c 20 -d R
78sync_all_pools
79
80log_must eval "kstat dbufs > $DBUFS_FILE"
81log_must eval "kstat dbufstats '' > $DBUFSTATS_FILE"
82
83for level in {0..11}; do
84	testdbufstat "cache_level_$level" "dbc=1,level=$level"
85done
86
87testdbufstat "cache_count" "dbc=1"
88testdbufstat "hash_elements" ""
89
90log_pass "dbufstats produces correct statistics passed"
91