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109 lines
3.2 KiB
Bash
109 lines
3.2 KiB
Bash
#!/bin/bash
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set -euo pipefail
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IFS=$'\n\t'
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declare -A event_map
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event_map[Ir]="TotalInstructionsExecuted,executions\n"
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event_map[I1mr]="L1_InstrReadCacheMisses,misses/op\n"
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event_map[ILmr]="LL_InstrReadCacheMisses,misses/op\n"
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event_map[Dr]="TotalMemoryReads,reads\n"
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event_map[D1mr]="L1_DataReadCacheMisses,misses/op\n"
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event_map[DLmr]="LL_DataReadCacheMisses,misses/op\n"
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event_map[Dw]="TotalMemoryWrites,writes\n"
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event_map[D1mw]="L1_DataWriteCacheMisses,misses/op\n"
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event_map[DLmw]="LL_DataWriteCacheMisses,misses/op\n"
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event_map[Bc]="ConditionalBranchesExecuted,executions\n"
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event_map[Bcm]="ConditionalBranchMispredictions,mispredictions/op\n"
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event_map[Bi]="IndirectBranchesExecuted,executions\n"
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event_map[Bim]="IndirectBranchMispredictions,mispredictions/op\n"
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now_ms() {
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echo -n $(date +%s%N | cut -b1-13)
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}
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# Run cachegrind on a given benchmark and echo the results.
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ITERATION_COUNT=$4
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START_TIME=$(now_ms)
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ARGS=( "$@" )
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REST_ARGS="${ARGS[@]:4}"
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valgrind \
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--quiet \
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--tool=cachegrind \
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"$1" "$2" $REST_ARGS>/dev/null
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ARGS=( "$@" )
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REST_ARGS="${ARGS[@]:4}"
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TIME_ELAPSED=$(bc <<< "$(now_ms) - ${START_TIME}")
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# Generate report using cg_annotate and extract the header and totals of the
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# recorded events valgrind was configured to record.
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CG_RESULTS=$(cg_annotate $(ls -t cachegrind.out.* | head -1))
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CG_HEADERS=$(grep -B2 'PROGRAM TOTALS$' <<< "$CG_RESULTS" | head -1 | sed -E 's/\s+/\n/g' | sed '/^$/d')
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CG_TOTALS=$(grep 'PROGRAM TOTALS$' <<< "$CG_RESULTS" | head -1 | grep -Po '[0-9,]+\s' | tr -d ', ')
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TOTALS_ARRAY=($CG_TOTALS)
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HEADERS_ARRAY=($CG_HEADERS)
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declare -A header_map
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for i in "${!TOTALS_ARRAY[@]}"; do
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header_map[${HEADERS_ARRAY[$i]}]=$i
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done
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# Map the results to the format that the benchmark script expects.
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for i in "${!TOTALS_ARRAY[@]}"; do
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TOTAL=${TOTALS_ARRAY[$i]}
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# Labels and unit descriptions are packed together in the map.
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EVENT_TUPLE=${event_map[${HEADERS_ARRAY[$i]}]}
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IFS=$',' read -d '\n' -ra EVENT_VALUES < <(printf "%s" "$EVENT_TUPLE")
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EVENT_NAME="${EVENT_VALUES[0]}"
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UNIT="${EVENT_VALUES[1]}"
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case ${HEADERS_ARRAY[$i]} in
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I1mr | ILmr)
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REF=${TOTALS_ARRAY[header_map["Ir"]]}
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OPS_PER_SEC=$(bc -l <<< "$TOTAL / $REF")
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;;
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D1mr | DLmr)
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REF=${TOTALS_ARRAY[header_map["Dr"]]}
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OPS_PER_SEC=$(bc -l <<< "$TOTAL / $REF")
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;;
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D1mw | DLmw)
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REF=${TOTALS_ARRAY[header_map["Dw"]]}
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OPS_PER_SEC=$(bc -l <<< "$TOTAL / $REF")
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;;
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Bcm)
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REF=${TOTALS_ARRAY[header_map["Bc"]]}
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OPS_PER_SEC=$(bc -l <<< "$TOTAL / $REF")
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;;
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Bim)
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REF=${TOTALS_ARRAY[header_map["Bi"]]}
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OPS_PER_SEC=$(bc -l <<< "$TOTAL / $REF")
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;;
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*)
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OPS_PER_SEC=$(bc -l <<< "$TOTAL")
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;;
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esac
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STD_DEV="0%"
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RUNS="1"
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if [[ $OPS_PER_SEC =~ ^[+-]?[0-9]*$ ]]
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then # $OPS_PER_SEC is integer
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printf "%s#%s x %.0f %s ±%s (%d runs sampled)\n" \
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"$3" "$EVENT_NAME" "$OPS_PER_SEC" "$UNIT" "$STD_DEV" "$RUNS"
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else # $OPS_PER_SEC is float
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printf "%s#%s x %.10f %s ±%s (%d runs sampled)\n" \
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"$3" "$EVENT_NAME" "$OPS_PER_SEC" "$UNIT" "$STD_DEV" "$RUNS"
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fi
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done
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