{"id":389,"date":"2018-05-03T20:53:06","date_gmt":"2018-05-03T18:53:06","guid":{"rendered":"https:\/\/www.gianlucamancusi.com\/?p=389"},"modified":"2018-05-03T20:53:32","modified_gmt":"2018-05-03T18:53:32","slug":"is-moores-law-accurate-enough","status":"publish","type":"post","link":"https:\/\/www.gianlucamancusi.com\/wordpress\/2018\/05\/03\/is-moores-law-accurate-enough\/","title":{"rendered":"Is moore’s law accurate enough?"},"content":{"rendered":"

During my university studies, Moore’s Law was very often mentioned and each time it always seemed to me a rough approximation but it makes sense.\u00a0For those who do not know Moore noticed that the number of transistors per square inch on integrated circuits had doubled every year since their invention.<\/em><\/p>\n

Moore’s prediction proved accurate for several decades, and has been used in the semiconductor industry to guide long-term planning and to set targets for research and development.<\/p>\n

I think that there are physical limits to the development of integrated circuits that can not be ignored. Such as the area and power to be dissipated.<\/p>\n

\"\"
This chart plots the processor performance relative to the VAX 11\/780 as measured by SPECint benchmarks. Reproduced from [28]. Copyright c Elsevier, Inc. All rights reserved.<\/figcaption><\/figure>As you can see, the beginning is slower and we are now slowing down, this is naturally described by an already known mathematical function, call logistic<\/strong> function.<\/p>\n

\"\"<\/p>\n

where<\/p>\n

    \n
  • e<\/i>\u00a0= the\u00a0natural logarithm\u00a0base (also known as\u00a0Euler’s number),<\/li>\n
  • x<\/i>0<\/sub>\u00a0= the\u00a0x<\/i>-value of the sigmoid’s midpoint,<\/li>\n
  • L<\/i>\u00a0= the curve’s maximum value, and<\/li>\n
  • k<\/i>\u00a0= the steepness of the curve<\/li>\n<\/ul>\n

    In its simplest form with k = 1<\/em>, x0 = 1 <\/em>and L = 1<\/em>:<\/p>\n

    \"\"<\/p>\n

    This is the graph of the function when the parameter k changes:<\/p>\n

    \"\"<\/p>\n

    With k = 2 we obtain a double growth every year, as stated by the moore law.<\/p>\n

    \"\"<\/p>\n

    We can therefore say that there is an area of initial growth and a saturation zone after which the phenomenon no longer grows.<\/p>\n

    At the center we find a zone of linear growth.
    \nPersonally I think the moore law is in the linear growth zone.<\/p>\n

    \"\"<\/p>\n

    This is Moore’s law model extended through the use of the logistic function that describes each natural trend. Tell me what you think about.<\/p>\n

    \"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

    During my university studies, Moore’s Law was very often mentioned and each time it always seemed to me a rough approximation but it makes sense.\u00a0For those who do not know Moore noticed that the number of transistors per square inch on integrated circuits had doubled every year since their invention. Moore’s prediction proved accurate for…<\/p>\n","protected":false},"author":1,"featured_media":400,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"footnotes":""},"categories":[12],"tags":[],"aioseo_notices":[],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/posts\/389"}],"collection":[{"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/comments?post=389"}],"version-history":[{"count":5,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/posts\/389\/revisions"}],"predecessor-version":[{"id":404,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/posts\/389\/revisions\/404"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/media\/400"}],"wp:attachment":[{"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/media?parent=389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/categories?post=389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gianlucamancusi.com\/wordpress\/wp-json\/wp\/v2\/tags?post=389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}