#!/bin/bash

[[ -z "$1" ]] && echo "Use: $0 <binary> [-c <core>] [-f <freq>] [-n <nruns>] [-l <log>] [-s]" && exit
[[ ! -f "$1" ]] && echo "Binary file not found, make sure to use 'make'" && exit
[[ ! -f "$1-stub" ]] && echo "Binary file for stubbed case not found, make sure to use 'make VARIANT=stub'" && exit

MDBENCH_BIN=$1
BIN_INFO="${MDBENCH_BIN#*-}" # $OPT_SCHEME-$TAG-$ISA-$PREC
OPT_SCHEME="${BIN_INFO%%-*}"
PREC="${BIN_INFO##*-}"
BIN_INFO="${BIN_INFO#*-}" # $TAG-$ISA-$PREC
BIN_INFO="${BIN_INFO%-*}" # $TAG-$ISA
TAG="${BIN_INFO%%-*}"
ISA="${BIN_INFO##*-}"
CORE="${CORE:-0}"
FREQ="${FREQ:-2.4}"
NRUNS="${NRUNS:-3}"
LOG="${LOG:-latencies_and_cfds.log}"
STUB_ONLY="${STUB_ONLY:-false}"

OPTIND=2
while getopts "c:f:n:l:s" flag; do
    case "${flag}" in
        c) CORE=${OPTARG};;
        f) FREQ=${OPTARG};;
        n) NRUNS=${OPTARG};;
        l) LOG=${OPTARG};;
        s) STUB_ONLY=true;;
    esac
done

# Other useful variables
MDBENCH_BIN=./MDBench-$OPT_SCHEME-$TAG-$ISA-$PREC
FIXED_PARAMS="--freq $FREQ"
CPU_VENDOR=$(lscpu | grep "Vendor ID" | tr -s ' ' | cut -d ' ' -f3)

if [ "$CPU_VENDOR" == "GenuineIntel" ]; then
    ALL_PREFETCHERS="HW_PREFETCHER,CL_PREFETCHER,DCU_PREFETCHER,IP_PREFETCHER"
    PREFETCHERS=("ALL HW_PREFETCHER CL_PREFETCHER DCU_PREFETCHER IP_PREFETCHER NONE")
else
    ALL_PREFETCHERS=""
    PREFETCHERS=("IGNORE")
fi

if [ "$OPT_SCHEME" == "gromacs" ]; then
    STUB1_NAME=stub-33
    STUB1_PARAMS="-na 4 -nn 33"
    STUB2_NAME=stub-128
    STUB2_PARAMS="-na 4 -nn 128"
else
    STUB1_NAME=stub-76
    STUB1_PARAMS="-nn 76"
    STUB2_NAME=stub-1024
    STUB2_PARAMS="-nn 1024"
fi

function run_benchmark() {
    BEST=10000000
    for i in $(seq $NRUNS); do
        RES=$(likwid-pin -c $CORE "$* $FIXED_PARAMS" 2>&1 | grep "Cycles/SIMD iteration" | cut -d ' ' -f3)
        if (( $(echo "$BEST > $RES" | bc -l ) )); then
            BEST=$RES
        fi
    done
}

echo "Tag: $TAG" | tee -a $LOG
echo "Optimization scheme: $OPT_SCHEME" | tee -a $LOG
echo "Instruction set: $ISA" | tee -a $LOG
echo "Precision: $PREC" | tee -a $LOG
echo "Binary: $MDBENCH_BIN(-stub)" | tee -a $LOG
echo "Frequency: $FREQ" | tee -a $LOG
echo "Number of runs: $NRUNS" | tee -a $LOG
echo "Run only stubbed cases: $STUB_ONLY" | tee -a $LOG

echo "Fixing frequencies..."
likwid-setFrequencies -f $FREQ -t 0

for p in $PREFETCHERS; do
    if [ "$p" != "IGNORE" ]; then
        if [ "$p" == "ALL" ]; then
            likwid-features -c $CORE -e $ALL_PREFETCHERS
        elif [ "$p" == "NONE" ]; then
            likwid-features -c $CORE -d $ALL_PREFETCHERS
        else
            likwid-features -c $CORE -d $ALL_PREFETCHERS
            likwid-features -c $CORE -e $p
        fi

        echo "Prefetcher settings: $p"
        likwid-features -c $CORE -l
    fi

    MSG="$p: "
    if [ "$STUB_ONLY" == "false" ]; then
        run_benchmark $MDBENCH_BIN
        MSG+="standard=$BEST, "
        run_benchmark $MDBENCH_BIN -i data/copper_melting/input_lj_cu_one_atomtype_20x20x20.dmp
        MSG+="melt=$BEST, "
        run_benchmark $MDBENCH_BIN -p data/argon_1000/mdbench_params.conf -i data/argon_1000/tprout.gro
        MSG+="argon=$BEST, "
    fi

    run_benchmark $MDBENCH_BIN-stub $STUB1_PARAMS
    MSG+="$STUB1_NAME=$BEST, "
    run_benchmark $MDBENCH_BIN-stub $STUB2_PARAMS
    MSG+="$STUB2_NAME=$BEST"
    echo $MSG | tee -a $LOG
done