I have observed in a system of mine a phenomenon that I’m hesitant to even try and classify.<\/p>\n
This system is a older AMD64.<\/p>\n
I can run a certain very-high-cpu-using process at nice 0 (normal priority) and the system core will rapidly heat up to 64 degrees C (it used to go considerably hotter and then go into thermal shutdown, but I put it in a case with a obscene number of fans, and even added a couple of extra well-placed CPU fans, and now it stops at 64).<\/p>\n
Or, I can run the same process at nice 19 – getting almost the same amount of work done<\/em> – the process still gets 96% of the CPU, and still performs it’s task at very close to the same rate (maybe 15% slower) – and have the CPU sit at 40 degrees C just as it does when the system is idle. I have observed in a system of mine a phenomenon that I’m hesitant to even try and classify. This system is a older AMD64. I can run a certain very-high-cpu-using process at nice 0 (normal priority) and the system core will rapidly heat up to 64 degrees C (it used to go considerably hotter and […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/posts\/1920"}],"collection":[{"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/comments?post=1920"}],"version-history":[{"count":0,"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/posts\/1920\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/media?parent=1920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/categories?post=1920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sheer.us\/weblogs\/wp-json\/wp\/v2\/tags?post=1920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\nCan anyone explain this? Does that last 15% really cost that much?<\/p>\n","protected":false},"excerpt":{"rendered":"