PI Berechnen

PI Berechnung auf 5000 Kommastellen. Dies lastet jedoch nur einen Core aus.

time echo "scale=5000; a(1)*4" | bc -l

Ergebnisse:

Hardware	CPU	Zeit
Selfmade Bender	AMD x3 415e @ 2,5Ghz	37 Sec
Selfmade bastardo	Via C6 @ 530Mhz	213 Sec
Dell Workstation	Intel P4 @ 3Ghz	53 Sec
Lenovo X390	Intel i5-8265U @ 1,6Ghz	16 Sec
HP DL380 G8	Intel Xeon E5-2620 @ 2Ghz	28 Sec
Dell R7525	AMD Epyc 7452 @ 3,35Ghz	16 Sec
Raspberry Zero	ARMv6 rev7 @ 700Mhz	146 Sec
Raspberry Pi 1	???	196 Sec
Raspberry Pi 3	???	67 Sec
Raspberry Pi 4	ARMv7 rev3 @ 2Ghz (OC)	37 Sec

Server bender 3x CPU AMD X3 415e @ 2,50Ghz: 37,5 Sec
Server bastardo 1x CPU VIA C6 (Nehemiah) @ 532Mhz: 213 Sec
Workstation trojar 1x CPU P4 @ 3Ghz: 53,9 Sec
Lenovo X390 i5-8265U CPU @ 1.60GHz: 16,5 Sec
HP DL380 G8 Xeon CPU E5-2620 0 @ 2.00GHz: 28 Sec
Dell R7525 AMD EPYC 7452 32-Core: 16 Sec
Raspberry 1: 3m 47 Sec
Raspberry 3: 1m 16 Sec
Raspberry 4: 37 Sec

time echo "scale=10000; a(1)*4" | bc -l

Ergebnisse:

Hardware	CPU	Zeit
Lenovo T460s	Intel i7-6600U	37 Sec
Lenovo X390	Intel i5-8265U @ 1,6Ghz	94 Sec
HP DL380 G8	Intel Xeon E5-2620 @ 2Ghz	168 Sec
HP Microsurf G10	AMD Opteron X3431	2,10Ghz	157 Sec
Dell R7525	AMD Epyc 7452 @ 3,35Ghz	96 Sec

PI Multi Start

for i in $(seq <cpucores>)  ; do echo "scale=5000; a(1)*4" | bc -l & done

Beispiel für 32 Cores:
for i in $(seq 32)  ; do echo "scale=5000; a(1)*4" | bc -l & done