--- title: Arm Working On "TLBID" For Linux To Increase Performance... description: Arm has sent an initial set of Linux kernel patches to support TLBI Domains (TLBID), a mechanism that lets Translation Lookaside Buffer invalidation target... canonical: https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Arm Working On "TLBID" For Linux To Increase Performance On High Core Count CPUs | daily.dev og:description: Arm has sent an initial set of Linux kernel patches to support TLBI Domains (TLBID), a mechanism that lets Translation Lookaside Buffer invalidation target... og:url: https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx og:image: https://api.daily.dev/og/posts/yxPbJfMpx.png og:image:alt: Arm Working On "TLBID" For Linux To Increase Performance On High Core Count CPUs og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Arm Working On "TLBID" For Linux To Increase Performance On High Core Count CPUs **[Phoronix](https://daily.dev/sources/phoronix)** · 1 min read · 0 upvotes · 0 comments ## Summary Arm has sent an initial set of Linux kernel patches to support TLBI Domains (TLBID), a mechanism that lets Translation Lookaside Buffer invalidation target only the CPU cores where a process actually ran instead of flushing the TLB system-wide. This is aimed at reducing overhead on high core count Arm server CPUs. No performance numbers have been published, TLBID is not yet part of the Arm Architecture Reference Manual, and the feature also requires LLVM 23+ or GNU Binutils 2.46+ for instruction support, meaning real silicon support is likely still far off. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What is Arm TLBID and how does it improve performance on high core count server CPUs? TLBID (TLBI Domains) is a proposed Arm feature letting the Linux kernel send TLB invalidation commands only to the specific CPU cores where a process actually ran, instead of flushing the TLB across the entire system. This reduces invalidation overhead, which matters most on high core count Arm server processors. It is not yet in the Arm Architecture Reference Manual and requires LLVM 23+ or Binutils 2.46+. _Track emerging Arm kernel features like TLBID on daily.dev as server CPU core counts keep climbing._ ## Similar posts on daily.dev - [Linux 7.1 Lands Workaround For Arm C1-Pro Erratum](https://daily.dev/posts/linux-7-1-lands-workaround-for-arm-c1-pro-erratum-p9wxa3qmk) · Phoronix · 0 upvotes · 0 comments - [tlbi= Boot Option Submitted Ahead Of Linux 7.2 Kernel Release](https://daily.dev/posts/tlbi-boot-option-submitted-ahead-of-linux-7-2-kernel-release-zpfrpxrb1) · Phoronix · 0 upvotes · 0 comments - [Linux Sees Patches For "Critical" Vulnerability Affecting Many Arm CPUs](https://daily.dev/posts/linux-sees-patches-for-critical-vulnerability-affecting-many-arm-cpus-i0fzrb307) · Phoronix · 4 upvotes · 0 comments - [AMD's new CPU core type just got unlocked on Linux before it was even announced](https://daily.dev/posts/amd-s-new-cpu-core-type-just-got-unlocked-on-linux-before-it-was-even-announced-kejwce9fl) · XDA Developers · 0 upvotes · 0 comments --- Tags: [#general-programming](https://daily.dev/tags/general-programming), [#linux](https://daily.dev/tags/linux), [#performance](https://daily.dev/tags/performance), [#hardware](https://daily.dev/tags/hardware), [#arm](https://daily.dev/tags/arm) [View this post on daily.dev](https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Arm Working On \"TLBID\" For Linux To Increase Performance On High Core Count CPUs","url":"https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx"},"datePublished":"2026-10-04T00:13:24.117Z","dateModified":"2026-10-04T00:13:52.065Z","description":"Arm has sent an initial set of Linux kernel patches to support TLBI Domains (TLBID), a mechanism that lets Translation Lookaside Buffer invalidation target...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b884e4e5cd61c03491fc79947e8f5530?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/b884e4e5cd61c03491fc79947e8f5530?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Phoronix","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Phoronix","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/6a26ba379dd64932830aa0c9803dd7ee","url":"https://daily.dev/sources/phoronix"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"general-programming,linux,performance,hardware,arm","timeRequired":"PT1M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Phoronix","item":"https://daily.dev/sources/phoronix"},{"@type":"ListItem","position":3,"name":"Arm Working On \"TLBID\" For Linux To Increase Performance On High Core Count CPUs"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/arm-working-on-tlbid-for-linux-to-increase-performance-on-high-core-count-cpus-yxpbjfmpx#faq","mainEntity":[{"@type":"Question","name":"What is Arm TLBID and how does it improve performance on high core count server CPUs?","acceptedAnswer":{"@type":"Answer","text":"TLBID (TLBI Domains) is a proposed Arm feature letting the Linux kernel send TLB invalidation commands only to the specific CPU cores where a process actually ran, instead of flushing the TLB across the entire system. 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