small CPU benchmark with PI, bc and time.

CPUBENCH() { local CPU="${1:-1}"; local SCALE="${2:-5000}"; { for LOOP in `seq 1 $CPU`; do { time echo "scale=${SCALE}; 4*a(1)" | bc -l -q | grep -v ^"[0-9]" & } ; done }; echo "Cores: $CPU"; echo "Digit: $SCALE" ;}
# 4 cores with 2500 pi digits CPUBENCH 4 2500 . every core will use 100% cpu and you can see how fast they calculate it. if you do 50000 digitits and more it can take hours or days
Sample Output
CPUBENCH 3 5000
Cores: 3
Digit: 5000

real	0m18.680s
user	0m18.678s
sys	0m0.005s

real	0m18.901s
user	0m18.869s
sys	0m0.035s

real	0m18.902s
user	0m18.899s
sys	0m0.005s

1
By: emphazer
2018-05-14 17:30:37

1 Alternatives + Submit Alt

  • Broken in two parts, first get the number of cores with cat /proc/cpuinfo |grep proc|wc -l and create a integer sequence with that number (xargs seq), then have GNU parallel loop that many times over the given command. Cheers! Show Sample Output


    -2
    time cat /proc/cpuinfo |grep proc|wc -l|xargs seq|parallel -N 0 echo "scale=4000\; a\(1\)\*4" '|' bc -l
    kostis · 2018-12-06 05:15:24 2

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