The holes in the wall are now patched and painted and other damage repaired so it's difficult to tell where Fido ran the wiring for the J5040 router. That leaves time for the Graviton 4.The Graviton 4 is now in general release. While waiting for funding and approval to spin up a 4-core virtual machine, I thought I'd test the Pentium J5040 in the soft router that Fido just installed for the dog house.
The hourly price of the amortized Pi 4 computers in the micro cloud is directly related to energy use. Around here summer on-peak rates are about 6 times higher than winter and off-peak. There is also the fact that generating heat in summer is not as useful as during winter.
The dog developer insists on multiplying maximum amps by volts to obtain watts, so 3*5 yields 15 watts for a Pi 4. It's worth noting the power used by the NAS from which the Pi 4 mounts its root and home directories is also involved. According to Fido, adding another Pi doesn't appreciably change the power consumption used by the NAS; on the paw, that NAS would not exist if not for the micro cloud. As a point of comparison, I'll use 30 watts total per Pi 4 instance and electricity priced at an excessive 0.4 per kWh. The result is a spot price of
30*0.4/1000=0.012 US$ per hour
for use of a single-tenant Pi 4 instance. Note that networking and data ingress egress costs are zero because the Pi cloud is on premise. In comparison the 4-core r8g.xlarge Graviton 4 instance on the Amazon EC2 cloud is 0.23564 US$ per hour, or in other words 20 times more costly.
The result of running Pi Chart on the Graviton 4 is
Code:
$ ./pichart-openmp -t "Graviton 4"pichart -- Raspberry Pi Performance OPENMP version 40Prime Sieve P=14630843 Workers=4 Sec=0.143106 Mops=6528.95Merge Sort N=16777216 Workers=8 Sec=0.343817 Mops=1171.13Fourier Transform N=4194304 Workers=4 Sec=0.045897 Mflops=10052.4Lorenz 96 N=32768 K=16384 Workers=4 Sec=0.0954031 Mflops=33764.4The Graviton 4 has Raspberry Pi ratio=200.418Making pie charts...done.Code:
Fido's Lorenz 96 Pi Race V19 0:🐕 9150.42 1: 🐩 9147.31 2: 🦛 9076.17 3: 🦒 9140.85Finished! Average Mflops per core: 9128.69 Standard deviation: 30.5164 Fast to slow core ratio: 1.00818 Raspberry Pi 4B ratio: 31.4625 Total Mflops: 36514.8The Gravition 4 is on average about 6 times faster than a Pi 4 when performing the Pi Chart calculations.
Statistics: Posted by ejolson — Thu Jul 18, 2024 4:20 pm