blob: 3c2c878c8509d0a1c17a09345005ed520f7062fe [file] [log] [blame]
#!/bin/bash
########################
# Function definitions #
########################
## Print the logarithm base 2 of $1 on stdout.
function log2 {
local i
for ((i=0;i<64;i++))
do
if [ $((2**i)) = "$1" ]; then
echo $i
return 0
fi
done
echo error
return 1
}
## Print the size of the level 2 cache in bytes on stdout.
function get_cache_size {
local s
if [ -e /sys/devices/system/cpu/cpu0/cache/index2/size ]; then
s="$(</sys/devices/system/cpu/cpu0/cache/index2/size)"
else
s="$(cat /proc/cpuinfo|while read a b c d e ; do if [ "$a" = cache -a "$b" = size ]; then echo $d $e; break; fi; done)"
s="${s%B}"
fi
if [ "${s%M}" != "$s" ]; then
echo $((${s%M}*1024*1024))
elif [ "${s%K}" != "$s" ]; then
echo $((${s%K}*1024))
else
echo $s
fi
}
## Read zero or more lines from stdin, and print the average and standard
# deviation per column. n is the number of lines, m the number of columns.
# Each line must have the same number of columns.
function avgstddev {
awk '{n++;m=NF;for(i=1;i<=NF;i++){sum[i]+=$i;sumsq[i]+=$i*$i}}END{for(i=1;i<=m;i++){d=sumsq[i]/n-sum[i]*sum[i]/n/n;printf "%.2f %.2f ",sum[i]/n,(d>=0.0001?sqrt(d):0.01)}}'
}
## Query the virtual memory size for the last invocation of command $1 from
# the information logged by the kernel (BSD process accounting).
function query_cmd_vsz {
local pacct
if [ ! -e /usr/sbin/dump-acct ]; then
echo "Error: userspace tools for BSD process accounting have not been" >&2
echo "installed. Please install the acct package (Debian systems)." >&2
return 1
fi
if ! { dump-acct -h 2>&1 | grep -q -w format; }; then
echo "Error: the installed version of dump-acct is not recent enough." >&2
return 1
fi
if [ -e /var/log/account/pacct ]; then
pacct=/var/log/account/pacct
elif [ -e /var/account/pacct ]; then
pacct=/var/account/pacct
else
echo "Where is the pacct file ?" >&2
return 1
fi
/usr/sbin/dump-acct "${pacct}" | \
grep -- "^$(basename "$1").*|v3|" | \
cut -f8 -d'|' | \
tail -n 1 | \
{ read vsz; echo ${vsz:-0}; }
}
## Query the virtual memory size for the last invocation of command $1 from
# the information logged by the kernel (BSD process accounting).
function query_vsz {
local cmd tool
cmd="$(basename "$1")"
if [ "${cmd}" = "vg-in-place" ]; then
tool="tool-not-found"
for arg in "${@}"
do
if [ "${arg#--tool=}" != "${arg}" ]; then
tool="${arg#--tool=}"
break
fi
done
vsz_tool="$(query_cmd_vsz "${tool}")"
awk "END{print $(query_cmd_vsz ${cmd}) + ${vsz_tool:-0}}" \
</dev/null
else
query_cmd_vsz "${cmd}"
fi
}
## Echo all arguments on stderr, run the command passed in $1 .. ${$#} three
# times, pass the output of ${test_input} -p${p} to the command, write the
# command output to the file specified in ${test_output}, and print the
# runtime of the command on stdout.
function measure_runtime {
local i
echo "$@" >&2
if [ "${test_output}" != "" ]; then
echo "$@" >"${test_output}"
fi
for ((i=0;i<3;i++))
do
echo -n "$("${test_input:-true}" $p | \
/usr/bin/time --format="%e" "$@" 2>&1 | \
tee -a "${test_output:-/dev/null}" | \
tail -n 1) "
query_vsz "$@"
done
}
## Print the average runtime of the command passed in $5 .. ${$#}, the ratio
# of the runtime to $1 +/- $2 and the ratio of the VSZ to $3 +/- $4.
function print_runtime_ratio {
local tmp avg1="$1" stddev1="$2" vsz1="$3" vszdev1="$4"
local avg2 stddev2 vsz2 vszdev2
if [ "${avg1}" = "" -o "${stddev1}" = "" -o "${vsz1}" = "" -o "${vszdev1}" = "" ]; then
echo "Error: invalid arguments ($@)."
exit 1
fi
shift
shift
shift
shift
tmp="/tmp/test-timing.$$"
rm -f "${tmp}"
measure_runtime "$@" | avgstddev > "$tmp"
read avg2 stddev2 vsz2 vszdev2 < "$tmp"
echo "Average time: ${avg2} +/- ${stddev2} seconds / VSZ ${vsz2} +/- ${vszdev2} KB"
awk "END{printf "'"'"Ratio = %.2f +/- %.2f; VSZ ratio: %.2f +/- %.2f\n"'"'", ${avg2}/${avg1}, ${avg2}/${avg1}*(${stddev1}/${avg1}+${stddev2}/${avg2}), ${vsz2}/${vsz1}, ${vsz2}/${vsz1}*(${vszdev1}/${vsz1}+${vszdev2}/${vsz2})}" </dev/null
}