Date: Sun, 05 Feb 2017 19:42:20 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 216833] TSC as timecounter makes system lag on Core 2 generation hardware Message-ID: <bug-216833-8@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216833 Bug ID: 216833 Summary: TSC as timecounter makes system lag on Core 2 generation hardware Product: Base System Version: CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: jiashiun@gmail.com CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org Originally discussed on freebsd-current@ https://lists.freebsd.org/pipermail/freebsd-current/2017-January/064419.html Since r310177 enablement of EARLY_AP_STARTUP, system time lags behind on In= tel Core 2 generation hardware (family 6 model 17). It happens to me on Intel Pentium T4200 and Core 2 E7400. Larry Rosenman (ler@) also confirmed it happening on Xeon E5410. Workaround: - Disable EARLY_AP_STARTUP, or - sysctl kern.timecounter.hardware=3DHPET --=20 You are receiving this mail because: You are the assignee for the bug.=
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