#!/bin/sh
# PCP QA Test No. 1176
# Exercise the BCC PMDA cachestat module - install, remove and values.
#
# Copyright (c) 2018-2019 Red Hat.
#

seq=`basename $0`
echo "QA output created by $seq"

. ./common.bcc

_pmdabcc_check
_bcc_check_ArgString || _notrun "bcc is broken (ArgString bug) on this platform"

# Only ext4 seems to be working currently:
# https://github.com/iovisor/bcc/issues/1993
fstype=$(df --output=fstype $(dirname $tmp) | grep -v Type)
[ $fstype != ext4 ] && _notrun "only ext4 works reliably with cachestat"

write_size=`expr 20 \* 1024 \* 1024` # number of bytes to write into testfile
out_file=$tmp.tmpfile

status=1       # failure is the default!
signal=$PCP_BINADM_DIR/pmsignal
$sudo rm -rf $tmp.* $seq.full

_prepare_pmda bcc
trap "_pmdabcc_cleanup; exit \$status" 0 1 2 3 15
_stop_auto_restart pmcd

# real QA test starts here
cat <<EOF | _pmdabcc_install
# Installed by PCP QA test $seq on `date`
[pmda]
modules = cachestat
prefix = bcc.
[cachestat]
module = cachestat
cluster = 17
EOF

_pmdabcc_wait_for_metric

# Generate write activity the BCC cachestat module
dd if=/dev/zero of=${out_file} bs=${write_size} count=1 conv=fsync 2>/dev/null
echo "=== report metric values for writes ==="
pminfo -dfmtT bcc.mem.vmstat.dirtied 2>&1 | tee -a $here/$seq.full \
| _value_filter_nonzero

# Generate read activity the BCC cachestat module
dd if=${out_file} of=/dev/null bs=${write_size} count=1 2>/dev/null

echo "=== report metric values for cached reads ==="
pminfo -dfmtT bcc.mem.vmstat.hits 2>&1 | tee -a $here/$seq.full \
| _value_filter_nonzero

_pmdabcc_remove

status=0
exit
