{"id":43865,"date":"2024-06-25T16:57:17","date_gmt":"2024-06-25T20:57:17","guid":{"rendered":"https:\/\/mjtsai.com\/blog\/?p=43865"},"modified":"2024-06-25T16:57:17","modified_gmt":"2024-06-25T20:57:17","slug":"visionos-throttles-cpu-based-on-microphones","status":"publish","type":"post","link":"https:\/\/mjtsai.com\/blog\/2024\/06\/25\/visionos-throttles-cpu-based-on-microphones\/","title":{"rendered":"visionOS Throttles CPU Based on Microphones"},"content":{"rendered":"<p><a href=\"https:\/\/x.com\/ShinyQuagsire\/status\/1804647261151907900\">Shiny Quagsire<\/a> (via <a href=\"https:\/\/news.ycombinator.com\/item?id=40764816\">Hacker News<\/a>):<\/p>\n<blockquote cite=\"https:\/\/x.com\/ShinyQuagsire\/status\/1804647261151907900\">\n<p>visionOS 2 (or RealityKit) seems to have gotten way more aggressive about power throttling (or my battery\/cable are having issues idk), so ALVR seems to throttle to 45Hz at much lower PPDs despite being totally fine thermally.<\/p>\n<p>lolll I found the answer, I was getting fucked by the userexperienced. Apparently it dictates thermal limits based on fan limits, and it sets fan limits based on <em>how much it hears the fans in the mics<\/em><\/p>\n<p>If I blast white noise, fan speeds stay at max + no throttle<\/p>\n<\/blockquote>\n\n<p><a href=\"https:\/\/news.ycombinator.com\/item?id=40765335\">rickdeckard<\/a>:<\/p>\n<blockquote cite=\"https:\/\/news.ycombinator.com\/item?id=40765335\"><p>Quite smart idea, not for throttling when the fans are heard, but SPEEDING THEM UP while they are NOT heard, based on the noise floor of the current environment.<\/p><p>This, combined with an assessment how much of the environment the user currently hears (i.e. maybe he is watching a movie), could provide a lot of headroom for additional cooling without bothering the user.<\/p><\/blockquote>","protected":false},"excerpt":{"rendered":"<p>Shiny Quagsire (via Hacker News): visionOS 2 (or RealityKit) seems to have gotten way more aggressive about power throttling (or my battery\/cable are having issues idk), so ALVR seems to throttle to 45Hz at much lower PPDs despite being totally fine thermally. lolll I found the answer, I was getting fucked by the userexperienced. Apparently [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"apple_news_api_created_at":"2024-06-25T20:57:19Z","apple_news_api_id":"474f3e0d-b165-4bd1-b19a-ba6aa39ba4e0","apple_news_api_modified_at":"2024-06-25T20:57:19Z","apple_news_api_revision":"AAAAAAAAAAD\/\/\/\/\/\/\/\/\/\/w==","apple_news_api_share_url":"https:\/\/apple.news\/AR08-DbFlS9Gxmrpqo5uk4A","apple_news_coverimage":0,"apple_news_coverimage_caption":"","apple_news_is_hidden":false,"apple_news_is_paid":false,"apple_news_is_preview":false,"apple_news_is_sponsored":false,"apple_news_maturity_rating":"","apple_news_metadata":"\"\"","apple_news_pullquote":"","apple_news_pullquote_position":"","apple_news_slug":"","apple_news_sections":"\"\"","apple_news_suppress_video_url":false,"apple_news_use_image_component":false,"footnotes":""},"categories":[2],"tags":[2402,95,1211,260,1942,2403,2603],"class_list":["post-43865","post","type-post","status-publish","format-standard","hentry","category-technology","tag-apple-vision-pro","tag-audio","tag-microphone","tag-processors","tag-thermal","tag-visionos","tag-visionos-2"],"apple_news_notices":[],"_links":{"self":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/43865","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/comments?post=43865"}],"version-history":[{"count":1,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/43865\/revisions"}],"predecessor-version":[{"id":43866,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/posts\/43865\/revisions\/43866"}],"wp:attachment":[{"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/media?parent=43865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/categories?post=43865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mjtsai.com\/blog\/wp-json\/wp\/v2\/tags?post=43865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}