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| # | |
| # cpu-technologie.R, 8 Nov 20 | |
| # | |
| # Data from: | |
| # Andrew Danowitz and Kyle Kelley and James Mao and John P. Stevenson and Mark Horowitz | |
| # CPU DB: Recording Microprocessor History | |
| # | |
| # Example from: | |
| # Evidence-based Software Engineering: based on the publicly available data | |
| # Derek M. Jones | |
| # | |
| # TAG cpu_Silicon device_atoms cpu_transistors frequency_evolution cpu_characteristics device_fabrication | |
| source("ESEUR_config.r") | |
| pal_col=rainbow(2) | |
| cpu=read.csv(paste0(ESEUR_dir, "benchmark/cpu-technologie.csv.xz"), as.is=TRUE) | |
| # 0.54307nm is the lattice size for Silicon atoms. | |
| # The lattice has a diamond cubic structure, so individuals atoms | |
| # are closer to each other than this. | |
| cpu$Si_atoms=cpu$feature_size*1000/0.54307 | |
| plot(cpu$year, cpu$Si_atoms, log="y", col=pal_col[2], | |
| xlim=c(1980, 2015), | |
| xlab="Year", ylab="Feature size (in Silicon atoms)\n") | |
| fs_mod=glm(log(Si_atoms) ~ year, data=cpu, subset=(year >=1990)) | |
| summary(fs_mod) | |
| years=1990:2010 | |
| pred=predict(fs_mod, new=data.frame(year=years)) | |
| lines(years, exp(pred), col=pal_col[1]) | |