cmb_bench_cpu.sh

#!/bin/sh
: ${THREADS:=$( getconf _NPROCESSORS_ONLN )} ${SET:=38} ${AC:=}
ABORTED=
S=$( date +%s )
T=$( cmb -otr $SET )
C=$(( $T / $THREADS ))
printf "Started: %s\n" "$( date )"
printf "Spawning $THREADS threads to to solve C(%d,S)... " "$SET"
for n in $( seq 1 $THREADS ); do
    cmd="cmb -oSr"
    if [ "$AC" ]; then # All-core stress test
        $cmd $SET &
    else
        [ $n -eq $THREADS ] || cmd="$cmd -c $C"
        $cmd -i $(( $C * ($n - 1) + 1 )) $SET &
    fi
    pids="$pids $!"
done
interrupt()
{
    printf "\nAborted.\n"
    exec 2> /dev/null
    kill $pids
    ABORTED=1
}
trap interrupt SIGINT
printf "done\n"
printf "Total combinations in C(%d,S) is %'d\n" "$SET" "$T"
if [ "$AC" ]; then # All-core stress test
    printf "Each thread working on %'d combinations\n" "$T"
else
    printf "Each thread working on %'d combinations\n" "$C"
fi
printf "Waiting for threads to complete. Press Ctrl-C to cancel test.\n"
n=20
while :; do
    running=
    for pid in $pids; do
        kill -0 $pid 2> /dev/null && running=1 && break
    done
    [ "$running" ] || break
    if [ $(( $n % 20 )) -eq 0 ]; then
        printf "%s -- load: %.2f\n" "$( date )" \
            "$( uptime | awk '($0=$(NF-2)) sub(/,$/,"")' )"
        n=1
    else
        n=$(( $n + 1 ))
    fi
    sleep 0.5
done
E=$(( $( date +%s ) - $S ))
[ "$ABORTED" ] || printf "Solved C(%d,S): %s\n" "$SET" "$( date )"
min=$(( $E / 60 ))
sec=$(( $E - 60 * $min ))
printf "Elapsed Time: %dm%ds\n" "$min" "$sec"