Date: Fri, 08 Dec 2023 17:47:28 +0000 From: bugzilla-noreply@freebsd.org To: fs@FreeBSD.org Subject: [Bug 275594] High CPU usage by arc_prune; analysis and fix Message-ID: <bug-275594-3630-TaYWIFdQoG@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-275594-3630@https.bugs.freebsd.org/bugzilla/> References: <bug-275594-3630@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D275594 --- Comment #8 from Seigo Tanimura <seigo.tanimura@gmail.com> --- (In reply to Seigo Tanimura from comment #7) Done. Build time: 07:14:10 (295 pkgs / hr) ARC memory size: ~5.8GB just when the final build finished, ~4.0 GB after cleaning up all of the poudriere builders. The final performance was rather like the case of vfs.vnode.vnlru.max_free_per_call=3D10000. arc_prune kept the CPU usage of= 20 - 40% after the build of lang/gcc12 until the end. Inside the ARC memory, "Other" of top(1) recorded ~2.0GB just when the final build finished. This value is the sum of: - kstat.zfs.misc.arcstats.bonus_size - kstat.zfs.misc.arcstats.dnode_size - kstat.zfs.misc.arcstats.dbuf_size Maybe I have work out the way to track them... --=20 You are receiving this mail because: You are the assignee for the bug.=
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