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  • Author Author: clem57
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What are you doing for Pi day? 3.14.15 (US)

clem57

I decided to compare Pi calculations on various SBC's

 

     time echo "scale=2015;4 * a(1)" | bc -l    Thanks

 

First up is X86 (I7 P55 home built):

 

 

real0m2.742s
user0m2.721s
sys0m0.002s
osZorin(ubuntu)
cpuIntelRegistered CoreTm i7 CPU 860 @ 2.80GHz × 8

 

pcDuino 3 :

 

 

real0m15.425s
user0m15.310s
sys0m0.010s
osUbuntu 3.4.79+
cpu

ARMv71 Rev 4

(1 Ghz)

 

Raspberry Pi Model B+ :

 

 

real0m24.225s
user0m24.260s
sys0m0.010s
osPidora 3.12.22
cpu

ARMv6hl.bcm2708

(700 Mhz)

 

Raspberry Pi Model 2 :

 

 

real0m15.536s
user0m15.536s
sys0m0.020s
osRasbian 3.18.7-v7+
cpu

armv7l.BCM2709 Rev 5

(900 Mhz)

 

 

Raspberry Pi Model 2 to find 9,999 digits of Pi:

 

real15m30.628s
user15m29.690s
sys0m0.510s

 

Not bad... Compared to X86!

 

===> More added here 3/16/15:

 

Atmel Sama5d4 :

 

 

real0m23.087s
user0m23.060s
sys0m0.000s
osYocto 3.10.0
cpu

armv7l A5 cortex

(563 Mhz)

 

===> More added here 7/16/16           Note: 2015 digits

 

Pine 64 Kickstarter :

 

 

real0m10.716s
user0m10.530s
sys0m0.000s
osdebianpine64 3.10.65-7-pine64-longsleep
cpu

AArch64 Processor rev 4 (Quad)

(1.2 Ghz)

fp asimd aes pmull sha1 sha2 crc32

 

Raspberry Pi  Model 3:

 

real0m8.073s
user0m8.020s
sys0m0.000s
osraspberrypi 4.4.15-v7+ #897
cpu

ARMv7 Processor rev 4 (v7l) (Quad)

(1.2 Ghz)

half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32

 

 

 

 

What do you think?

Attachments:
Pi 9999 digits X86.txt.zip
Parents

  • I think I'll just act out the classic mnemonic for remembering the first digits of pi: how I need a drink (alcoholic of course) after the heavy lectures involving quantum mechanics.

     

    Count the letters in each word: 3 1 4 1 5 9 2 6 5 3... Mnemonics like this work because pi's first 0 digit is the 32nd decimal place.

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  • I think I'll just act out the classic mnemonic for remembering the first digits of pi: how I need a drink (alcoholic of course) after the heavy lectures involving quantum mechanics.

     

    Count the letters in each word: 3 1 4 1 5 9 2 6 5 3... Mnemonics like this work because pi's first 0 digit is the 32nd decimal place.

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