Date: Sun, 11 Feb 2024 14:47:29 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 276967] sysctl dev.hwpstate_intel periodically slow Message-ID: <bug-276967-227-KAqgfW7fVe@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-276967-227@https.bugs.freebsd.org/bugzilla/> References: <bug-276967-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=276967 Mark Johnston <markj@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |markj@FreeBSD.org Status|New |Open --- Comment #1 from Mark Johnston <markj@FreeBSD.org> --- The sysctl handler uses sched_bind() to pin itself to a CPU. This is fragile and can take "forever" if a higher-priority thread is monopolizing the CPU. Assuming this is the problem here, we should modify the handler to use an IPI instead. When the problem occurs, is there high CPU usage? Output from "procstat -kka" during a hang would be useful. -- You are receiving this mail because: You are the assignee for the bug.help
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