--- title: "USB4STREAM Adding Busy Poll Option For Lower Latency At The Cost Of Increased CPU Cycles" url: https://daily.dev/posts/usb4stream-adding-busy-poll-option-for-lower-latency-at-the-cost-of-increased-cpu-cycles-u05w3xz9a source_url: https://www.phoronix.com/news/USB4STREAM-Lower-Latency type: article source: "Phoronix" published: 2026-08-05T21:33:12.415Z updated: 2026-08-05T22:29:36.965Z tags: ["linux", "intel"] reading_time: 1 upvotes: 0 comments: 0 language: 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. # USB4STREAM Adding Busy Poll Option For Lower Latency At The Cost Of Increased CPU Cycles **[Phoronix](https://daily.dev/sources/phoronix)** · 1 min read · 0 upvotes · 0 comments ## Summary A busy poll mode is being added to USB4STREAM in Linux 7.3, allowing latency-critical applications to avoid interrupt-based scheduling at the cost of higher CPU usage. The feature, developed by Intel's Mika Westerberg with AI assistance, is toggled via a new ConfigFS attribute at /sys/kernel/config/thunderbolt/stream/[xdomain].[service]/$name/busy_poll. The patch is currently in thunderbolt.git's next branch ahead of the Linux 7.3 merge window. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [USB4STREAM Merged For Linux 7.2 To Quickly Send Data Between USB4 Connected Systems](https://daily.dev/posts/usb4stream-merged-for-linux-7-2-to-quickly-send-data-between-usb4-connected-systems-r3euxdibq) · Phoronix · 0 upvotes · 0 comments - [Intel Introducing USB4STREAM Protocol For Linux - Opening Up Some Nifty Uses For USB4](https://daily.dev/posts/intel-introducing-usb4stream-protocol-for-linux---opening-up-some-nifty-uses-for-usb4-3pub6v4q4) · Phoronix · 2 upvotes · 0 comments - [A New Linux Driver Could Make USB4 Cables a Blazing Fast Way to Move Data](https://daily.dev/posts/a-new-linux-driver-could-make-usb4-cables-a-blazing-fast-way-to-move-data-vmnsnowa3) · It's Foss · 7 upvotes · 0 comments - [USB4STREAM, Optimizations, Jay & Other Popular Intel Linux News From This Quarter](https://daily.dev/posts/usb4stream-optimizations-jay-other-popular-intel-linux-news-from-this-quarter-ugwz9edhq) · Phoronix · 0 upvotes · 0 comments - [Proposed Linux Patch For A Brief Delay To Match PCI Spec Will Hopefully Address Some Bugs](https://daily.dev/posts/proposed-linux-patch-for-a-brief-delay-to-match-pci-spec-will-hopefully-address-some-bugs-xlwgopxxv) · Phoronix · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#intel](https://daily.dev/tags/intel) [View this post on daily.dev](https://daily.dev/posts/usb4stream-adding-busy-poll-option-for-lower-latency-at-the-cost-of-increased-cpu-cycles-u05w3xz9a)