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#!/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"
# the cachestat BCC module uses kprobes that might attach to kernel symbols
# that are not present ... add to the list below as required
#
for symbol in account_page_dirtied
do
grep " T $symbol\$" /proc/kallsyms >/dev/null || _notrun "kernel does not contain required $symbol symbol"
done
# Only ext4 seems to be working currently:
# https://github.com/iovisor/bcc/issues/1993
fstype=$(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=$PCP_BINADM_DIR/pmsignal
cat <<EOF >$tmp.conf
# Installed by PCP QA test $seq on `date`
[pmda]
modules = cachestat
prefix = bcc.
[cachestat]
module = cachestat
cluster = 17
EOF
_pmdabcc_try_compile $tmp.conf
_prepare_pmda bcc
trap "_pmdabcc_cleanup; exit \$status" 0 1 2 3 15
_stop_auto_restart pmcd
# real QA test starts here
_pmdabcc_install <$tmp.conf
_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 $seq_full \
| _value_filter_nonzero
# Generate read activity the BCC cachestat module
dd if=${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 $seq_full \
| _value_filter_nonzero
_pmdabcc_remove
status=0
exit
|
