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#!/bin/bash
# Watch CPU temperature while compiling
#
# Author: Peter Wu <lekensteyn@gmail.com>
# Created: 2013-07-31
GITREPO=${GITREPO:-$HOME/Linux-src/linux}
SRCDIR=${SRCDIR:-/tmp/linux-src}
BUILDDIR=${BUILDDIR:-/tmp/linux-build}
LOGDIR=${LOGDIR:-.}
for arg; do
# Clear all arguments in order to print usage message.
case $arg in
--help|-h)
set --
break
;;
esac
if ! [[ $arg -gt 0 ]]; then
echo "Invalid number: $arg" >&2
exit 1
fi
done
if [ $# -lt 2 ]; then
cat <<EOF
Usage: $0 repetitions cores1 [cores2 ... coresN]
Use at least three repetitions to get a reliable average. Specify a
number of cores to test. For example, to compare a dual core against a
quad core CPU, I used the following:
$0 3 4 8 12 16
Timings and results will be written to stdout.
The following environment vars are available:
# Path to Linux git repository (to fetch sources from). Unused if
# SRCDIR is given which contains a 'version' file.
GITREPO=$GITREPO
# Directory to build the kernel from. If there is no 'version' file,
# the directory will be removed and created from sources in GITREPO.
SRCDIR=$SRCDIR
# Output directory for object files.
BUILDDIR=$BUILDDIR
# Directory to store temperature readings.
LOGDIR=$LOGDIR
EOF
exit 1
fi
# Begin logic
if ! [ -e "$SRCDIR/version" ]; then
if [ -d "$SRCDIR/.git" ]; then
echo "$SRCDIR is a git repo, which I will not delete." >&2
echo "Create the 'version' file in the SRCDIR directory" >&2
echo "or specify a different target SRCDIR." >&2
exit 1
fi
rm -rf "$SRCDIR"
mkdir "$SRCDIR"
if ! (cd "$GITREPO" && git describe) > "$SRCDIR/version"; then
echo "$GITREPO is not a git repo? Aborting!" >&2
exit 1
fi
(cd "$GITREPO" && time git archive HEAD) | tar x -C "$SRCDIR"
fi
cat "$SRCDIR/version"
mk() {
make -C "$SRCDIR" O="$BUILDDIR" "$@"
}
get_temps() {
cat /sys/devices/platform/coretemp.0/temp*_input |
tr '\n' '\t' | sed 's/\t$/\n/'
}
temp_logger() {
local name=$1
mkdir -p "$LOGDIR"
while sleep 1; do
get_temps
done > "$LOGDIR/$name"
}
run() {
local tag jobs sec1 sec2 logpid templog
tag=$1
jobs=$2
templog="temps-$tag-$jobs"
rm -rf "$BUILDDIR"
mkdir "$BUILDDIR"
mk defconfig >/dev/null 2>&1
echo
echo "Running $tag-$jobs"
temp_logger "$templog" & logpid=$!
trap "kill $logpid" EXIT
{ time {
sec1=$(date +%s)
mk -j$jobs bzImage modules >/dev/null 2>&1
sec2=$(date +%s)
echo "jobs=$jobs secs=$((sec2-sec1))"
echo -n "loadavg: "
cut -d\ -f1-3 /proc/loadavg
}; } 2>&1
kill $logpid; wait $logpid 2>/dev/null
# Very simple statistics
echo "Temperature (min / avg / max):"
awk '
{
for (i=0; i<NF; i++) {
sum[i] += $i / 1000;
if (max[i] < $i) max[i] = $i;
if (min[i] == "" || min[i] > $i) min[i] = $i;
}
count++;
}
END {
for (i in sum) {
avg = sum[i] / count;
print min[i] / 1000, "/", avg, "/", max[i] / 1000
}
}
' "$LOGDIR/$templog"
}
resdir="res-$(date +%Y%m%d-%H%M%S)"
mkdir -v "$resdir"
cd "$resdir"
trials=$1; shift
for ((trial_no=1; trial_no<=trials; trial_no++)); do
for jobs; do
run $trial_no $jobs
done
done
#rm -rf "$BUILDDIR" "$SRCDIR"
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