{"id":4508,"date":"2023-08-01T11:35:37","date_gmt":"2023-08-01T11:35:37","guid":{"rendered":"https:\/\/picockpit.com\/raspberry-pi\/?p=4508"},"modified":"2023-08-01T11:35:39","modified_gmt":"2023-08-01T11:35:39","slug":"python-dispatch-making-the-gil-optional","status":"publish","type":"post","link":"https:\/\/picockpit.com\/raspberry-pi\/sv\/python-dispatch-making-the-gil-optional\/","title":{"rendered":"Python Dispatch: G\u00f6r GIL valfri"},"content":{"rendered":"<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-1024x576.png\" alt=\"\" class=\"wp-image-4511\" srcset=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-1024x576.png 1024w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-300x169.png 300w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-768x432.png 768w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch-18x10.png 18w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/Python-Dispatch.png 1200w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p>Styrningsr\u00e5det har gjort f\u00f6ljande<a href=\"https:\/\/discuss.python.org\/t\/a-steering-council-notice-about-pep-703-making-the-global-interpreter-lock-optional-in-cpython\/30474\"> ett stort tillk\u00e4nnagivande om framtiden f\u00f6r Python<\/a>. De har n\u00e4mligen beslutat att g\u00f6ra Global Interpreter Lock (GIL) valfritt i CPython och s\u00e5 sm\u00e5ningom ta bort GIL helt och h\u00e5llet.<\/p>\n\n\n\n<p>Detta \u00e4r ett enormt beslut som kommer att f\u00f6r\u00e4ndra Python i grunden.<\/p>\n\n\n\n<p>D\u00e4rf\u00f6r kommer jag i det h\u00e4r inl\u00e4gget att g\u00e5 igenom vad GIL \u00e4r, dess f\u00f6rdelar och nackdelar och vad framtiden har att erbjuda.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">GIL<\/h2>\n\n\n\n<p>L\u00e5t mig g\u00e5 igenom det globala tolkl\u00e5set ett ord i taget i omv\u00e4nd ordning, med b\u00f6rjan med <em>l\u00e5s<\/em> och d\u00e4refter <em>tolk<\/em> och slutligen, <em>global<\/em>.<\/p>\n\n\n\n<p>Ett l\u00e5s \u00e4r en mekanism som g\u00f6r att endast en tr\u00e5d kan k\u00f6ras \u00e5t g\u00e5ngen. S\u00e5 n\u00e4r en tr\u00e5d f\u00e5r tag i l\u00e5set f\u00e5r den exklusiv \u00e5tkomst till Python-tolken.<\/p>\n\n\n\n<p>En <a href=\"https:\/\/picockpit.com\/raspberry-pi\/whats-the-difference-between-micropython-circuitpython-cpython-anyway\/\">tolken \u00e4r programmet f\u00f6r att exekvera Python-kod<\/a>.<\/p>\n\n\n\n<p>Ordet \"global\" syftar h\u00e4r p\u00e5 tolkl\u00e5sets omfattning. Eftersom tolkl\u00e5set \u00e4r globalt garanterar det att endast en tr\u00e5d \u00e5t g\u00e5ngen exekverar Python-kod inom en och samma process.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1.png\" alt=\"\" class=\"wp-image-4520\" width=\"451\" height=\"345\" srcset=\"https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1.png 645w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1-300x229.png 300w, https:\/\/picockpit.com\/raspberry-pi\/wp-content\/uploads\/2023\/08\/image-1-16x12.png 16w\" sizes=\"auto, (max-width: 451px) 100vw, 451px\" \/><figcaption class=\"wp-element-caption\">Kredit: <a href=\"https:\/\/statusneo.com\/concurrency-in-python-threading-processes-and-asyncio\/\">StatusNeo<\/a>.<\/figcaption><\/figure>\n<\/div>\n\n\n<p>GIL \u00e4r allts\u00e5 en mekanism som f\u00f6rhindrar att flera tr\u00e5dar k\u00f6rs samtidigt genom tolken. Men varf\u00f6r skulle man vilja det?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">F\u00f6rdelar<\/h2>\n\n\n\n<p>Den fr\u00e4msta f\u00f6rdelen med GIL \u00e4r att det g\u00f6r saker enklare. Det \u00e4r l\u00e4ttare att hantera minnet, det \u00e4r l\u00e4ttare att hantera tr\u00e5dar och det \u00e4r l\u00e4ttare att skapa moduler.<\/p>\n\n\n\n<p>Utan GIL kan du snabbt st\u00f6ta p\u00e5 problem med multitr\u00e5dning. Om du inte s\u00e4tter in r\u00e4tt lokala l\u00e5s f\u00f6r varje tr\u00e5d kan det sluta med att Python kraschar eller att n\u00e5got annat minne i datorn skadas.<\/p>\n\n\n\n<p>Och om du inte anv\u00e4nder multithreading \u00e4r GIL till stor hj\u00e4lp, eftersom den ser till att allt g\u00e5r smidigt.<\/p>\n\n\n\n<p>S\u00e5 GIL h\u00e5ller saker och ting enkla och s\u00e4kra.<\/p>\n\n\n\n<p>Varf\u00f6r skulle du d\u00e5 inte vilja det?<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Nackdelar<\/h2>\n\n\n\n<p>Avv\u00e4gningen h\u00e4r \u00e4r enkelhet mot snabbhet.<\/p>\n\n\n\n<p>Genom att f\u00f6rhindra multitr\u00e5dning g\u00f6r GIL CPython l\u00e5ngsammare och mindre h\u00f6gpresterande \u00e4n vissa andra spr\u00e5k (som C++, Go och Rust).<\/p>\n\n\n\n<p>S\u00e4rskilt med den explosionsartade utvecklingen av AI under de senaste m\u00e5naderna blir GIL ett allt st\u00f6rre problem n\u00e4r det g\u00e4ller att exekvera program snabbt och effektivt.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" hcb-fetch-image-from=\"https:\/\/www.youtube.com\/watch?v=9OOJcTp8dqE\" title=\"Keynote: Python med flera tr\u00e5dar utan GIL - presenterad av Sam Gross\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/9OOJcTp8dqE?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">GIL:s framtid<\/h2>\n\n\n\n<p>S\u00e5 nu n\u00e4r styrningsr\u00e5det har meddelat att de har accepterat <a href=\"https:\/\/peps.python.org\/pep-0703\/#alternatives\">Python Enhancement Proposal (PEP) 703, skrivet av Sam Gross<\/a>Vi \u00e4r p\u00e5 v\u00e4g in p\u00e5 ok\u00e4nt vatten.<\/p>\n\n\n\n<p>Otaliga till\u00e4gg har skrivits med GIL i \u00e5tanke. Alla standarder som s\u00e4tts med CPython \u00e4r beroende av GIL. Alla bygger i CPython med GIL i centrum f\u00f6r sina program (antingen avsiktligt eller inte).<\/p>\n\n\n\n<p>Styrningsr\u00e5det g\u00f6r d\u00e4rf\u00f6r inledningsvis GIL frivilligt, men p\u00e5 l\u00e5ng sikt planerar de att fasa ut GIL helt och h\u00e5llet. <\/p>\n\n\n\n<p>Som de uttryckte det i inl\u00e4gget: \"Vi vill inte skapa en permanent uppdelning mellan with-GIL och no-GIL builds (och till\u00e4ggsmoduler).\"<\/p>\n\n\n\n<p>Detta kommer att f\u00f6r\u00e4ndra Python fullst\u00e4ndigt och, kanske mest intressant, p\u00e5 s\u00e4tt som ingen \u00e4nnu vet. Brett Cannon, <a href=\"https:\/\/discuss.python.org\/t\/poll-feedback-to-the-sc-on-making-cpython-free-threaded-and-pep-703\/28540\">i en enk\u00e4t till k\u00e4rnutvecklarteamet<\/a>, skrev att \"att g\u00f6ra Python fritt tr\u00e5dat... har m\u00e5nga ok\u00e4nda faktorer. Vi vet inte hur mycket kod som implicit f\u00f6rlitar sig p\u00e5 GIL, eller tr\u00e5d-os\u00e4ker p\u00e5 subtila s\u00e4tt som maskeras av GIL.\"<\/p>\n\n\n\n<p>GIL f\u00f6rsvinner - vad tar den med sig?<\/p>\n\n\n\n<p>Och, \u00e4nnu viktigare, hur kommer det nya CPython att se ut?<\/p>\n<div class=\"shariff shariff-align-center shariff-widget-align-left shariff-buttonstretch\"><ul class=\"shariff-buttons theme-white orientation-horizontal buttonsize-medium\"><li class=\"shariff-button twitter shariff-nocustomcolor\" style=\"background-color:#595959\"><a href=\"https:\/\/twitter.com\/share?url=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fsv%2Fpython-dispatch-making-the-gil-optional%2F&text=Python%20Dispatch%3A%20Making%20the%20GIL%20Optional\" title=\"Dela p\u00e5 X\" aria-label=\"Dela p\u00e5 X\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#000; color:#000\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#000\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 24 24\"><path fill=\"#000\" d=\"M14.258 10.152L23.176 0h-2.113l-7.747 8.813L7.133 0H0l9.352 13.328L0 23.973h2.113l8.176-9.309 6.531 9.309h7.133zm-2.895 3.293l-.949-1.328L2.875 1.56h3.246l6.086 8.523.945 1.328 7.91 11.078h-3.246zm0 0\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#000\">dela<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button facebook shariff-nocustomcolor\" style=\"background-color:#4273c8\"><a href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fsv%2Fpython-dispatch-making-the-gil-optional%2F\" title=\"Dela p\u00e5 Facebook\" aria-label=\"Dela p\u00e5 Facebook\" role=\"button\" rel=\"nofollow\" class=\"shariff-link\" style=\"; background-color:#3b5998; color:#3b5998\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#3b5998\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 18 32\"><path fill=\"#3b5998\" d=\"M17.1 0.2v4.7h-2.8q-1.5 0-2.1 0.6t-0.5 1.9v3.4h5.2l-0.7 5.3h-4.5v13.6h-5.5v-13.6h-4.5v-5.3h4.5v-3.9q0-3.3 1.9-5.2t5-1.8q2.6 0 4.1 0.2z\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#3b5998\">dela<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button telegram shariff-nocustomcolor\" style=\"background-color:#4084A6\"><a href=\"https:\/\/telegram.me\/share\/url?url=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fsv%2Fpython-dispatch-making-the-gil-optional%2F&text=Python%20Dispatch%3A%20Making%20the%20GIL%20Optional\" title=\"Dela p\u00e5 Telegram\" aria-label=\"Dela p\u00e5 Telegram\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#0088cc; color:#0088cc\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#0088cc\"><svg width=\"32px\" height=\"20px\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 32 32\"><path fill=\"#0088cc\" d=\"M30.8 6.5l-4.5 21.4c-.3 1.5-1.2 1.9-2.5 1.2L16.9 24l-3.3 3.2c-.4.4-.7.7-1.4.7l.5-7L25.5 9.2c.6-.5-.1-.8-.9-.3l-15.8 10L2 16.7c-1.5-.5-1.5-1.5.3-2.2L28.9 4.3c1.3-.5 2.3.3 1.9 2.2z\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#0088cc\">dela<\/span>&nbsp;<\/a><\/li><li class=\"shariff-button reddit shariff-nocustomcolor\" style=\"background-color:#ff5700\"><a href=\"https:\/\/www.reddit.com\/submit?url=https%3A%2F%2Fpicockpit.com%2Fraspberry-pi%2Fsv%2Fpython-dispatch-making-the-gil-optional%2F\" title=\"Dela p\u00e5 Reddit\" aria-label=\"Dela p\u00e5 Reddit\" role=\"button\" rel=\"noopener nofollow\" class=\"shariff-link\" style=\"; background-color:#ff4500; color:#ff4500\" target=\"_blank\"><span class=\"shariff-icon\" style=\"fill:#ff4500\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 512 512\"><path fill=\"#ff4500\" d=\"M440.3 203.5c-15 0-28.2 6.2-37.9 15.9-35.7-24.7-83.8-40.6-137.1-42.3L293 52.3l88.2 19.8c0 21.6 17.6 39.2 39.2 39.2 22 0 39.7-18.1 39.7-39.7s-17.6-39.7-39.7-39.7c-15.4 0-28.7 9.3-35.3 22l-97.4-21.6c-4.9-1.3-9.7 2.2-11 7.1L246.3 177c-52.9 2.2-100.5 18.1-136.3 42.8-9.7-10.1-23.4-16.3-38.4-16.3-55.6 0-73.8 74.6-22.9 100.1-1.8 7.9-2.6 16.3-2.6 24.7 0 83.8 94.4 151.7 210.3 151.7 116.4 0 210.8-67.9 210.8-151.7 0-8.4-.9-17.2-3.1-25.1 49.9-25.6 31.5-99.7-23.8-99.7zM129.4 308.9c0-22 17.6-39.7 39.7-39.7 21.6 0 39.2 17.6 39.2 39.7 0 21.6-17.6 39.2-39.2 39.2-22 .1-39.7-17.6-39.7-39.2zm214.3 93.5c-36.4 36.4-139.1 36.4-175.5 0-4-3.5-4-9.7 0-13.7 3.5-3.5 9.7-3.5 13.2 0 27.8 28.5 120 29 149 0 3.5-3.5 9.7-3.5 13.2 0 4.1 4 4.1 10.2.1 13.7zm-.8-54.2c-21.6 0-39.2-17.6-39.2-39.2 0-22 17.6-39.7 39.2-39.7 22 0 39.7 17.6 39.7 39.7-.1 21.5-17.7 39.2-39.7 39.2z\"\/><\/svg><\/span><span class=\"shariff-text\" style=\"color:#ff4500\">dela<\/span>&nbsp;<\/a><\/li><\/ul><\/div>","protected":false},"excerpt":{"rendered":"<p>Styrningsr\u00e5det har gjort ett stort tillk\u00e4nnagivande om Pythons framtid. De har n\u00e4mligen beslutat att g\u00f6ra Global Interpreter Lock (GIL) valfritt i CPython och s\u00e5 sm\u00e5ningom ta bort GIL helt och h\u00e5llet. Detta \u00e4r ett stort beslut som kommer att f\u00f6r\u00e4ndra Python i grunden. D\u00e4rf\u00f6r kommer jag i det h\u00e4r inl\u00e4gget att g\u00e5 igenom vad GIL \u00e4r, dess...<\/p>","protected":false},"author":2,"featured_media":4511,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1193,1721],"tags":[1726,1727,477,1731,1732,996,1729,1722,14,1723,1728,1725,476,1730,1724],"class_list":["post-4508","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","category-python-dispatch","tag-async","tag-asynchronous-programming","tag-circuitpython","tag-concurrency","tag-concurrent-programming","tag-cpython","tag-gil","tag-global-interpreter-lock","tag-micropython","tag-multithreading","tag-parallel-programming","tag-parallelism","tag-python","tag-python-dispatch","tag-single-threading"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Python 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