{"id":232866,"date":"2026-04-09T09:51:00","date_gmt":"2026-04-09T13:51:00","guid":{"rendered":"https:\/\/news-you-need.com\/index.php\/2026\/04\/09\/risc-v-optimized-strnlen-implementation-for-linux-7-1-yields-big-speed-up\/"},"modified":"2026-04-09T10:25:12","modified_gmt":"2026-04-09T14:25:12","slug":"risc-v-optimized-strnlen-implementation-for-linux-7-1-yields-big-speed-up","status":"publish","type":"post","link":"https:\/\/news-you-need.com\/index.php\/2026\/04\/09\/risc-v-optimized-strnlen-implementation-for-linux-7-1-yields-big-speed-up\/","title":{"rendered":"RISC-V Optimized strnlen Implementation For Linux 7.1 Yields Big Speed-Up"},"content":{"rendered":"<p><a href=\"https:\/\/www.phoronix.com\/news\/Linux-7.1-RISC-V-strnlen\">RISC-V Optimized strnlen Implementation For Linux 7.1 Yields Big Speed-Up<\/a><\/p>\n<p><a href=\"https:\/\/www.phoronix.com\/news\/Linux-7.1-RISC-V-strnlen\">https:\/\/www.phoronix.com\/news\/Linux-7.1-RISC-V-strnlen<\/a><\/p>\n<p>Publish Date: <a href=\"publish_date]\">2026-04-09 09:51:00<\/a><\/p>\n<p>Source Domain: <a href=\"www.phoronix.com\">www.phoronix.com<\/a><\/p>\n<p>In addition to RISC-V discontinuing its eXecute In Place &#8220;XIP&#8221; kernel support for Linux 7.1, there is an optimized strnlen() function coming for Linux 7.1 on RISC-V as well as some other optimized functions.<\/p>\n<p>Feng Jiang with KylinOS wrote a hand-optimized strnlen() implementation for RISC-V with both a generic code path and Zbb-powered version. The strnlen() function used throughout the kernel for safely determining the length of a string is seeing a massive speed-up as a result of the hand-optimized RISC-V Assembly code.<br \/>\n<\/p>\n<p align=\"center\"><img decoding=\"async\" src=\"https:\/\/www.phoronix.net\/image.php?id=2026&#038;image=riscv_faster_strnlen\" alt=\"RISC-V strnlen benchmark\"\/><\/p>\n<p>Benchmarks are showing as much as a +427.5% improvement with the RISC-V optimized strnlen function appearing at long last.<\/p>\n<p>The strnlen optimization patch is queued into the RISC-V&#8217;s &#8220;for-next&#8221; Git branch ahead of the Linux 7.1 merge window opening next week.\n<\/p>\n<p>There is also a RISC-V optimized strchr() function too for up to a 7% improvement for finding the first occurence of the character in a string. And the optimized strrchr() for the reverse searching yielding up to a 8% improvement from that hand-written RISC-V Assembly for the Linux kernel.<\/p>\n<p><a href=\"https:\/\/www.phoronix.com\/news\/Linux-7.1-RISC-V-strnlen\">Source<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>RISC-V Optimized strnlen Implementation For Linux 7.1 Yields Big Speed-Up https:\/\/www.phoronix.com\/news\/Linux-7.1-RISC-V-strnlen Publish Date: 2026-04-09 09:51:00&#8230;<\/p>\n","protected":false},"author":1,"featured_media":232867,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/www.phoronix.net\/image.php?id=2026&image=riscv_faster_strnlen","fifu_image_alt":"","footnotes":""},"categories":[48],"tags":[71],"class_list":["post-232866","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-linux","tag-linux"],"_links":{"self":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/232866"}],"collection":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/comments?post=232866"}],"version-history":[{"count":1,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/232866\/revisions"}],"predecessor-version":[{"id":232868,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/posts\/232866\/revisions\/232868"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media\/232867"}],"wp:attachment":[{"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/media?parent=232866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/categories?post=232866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news-you-need.com\/index.php\/wp-json\/wp\/v2\/tags?post=232866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}