Date: Sun, 15 Jan 2017 10:11:52 +0800 From: Jia-Shiun Li <jiashiun@gmail.com> To: freebsd-current <freebsd-current@freebsd.org> Subject: Re: TSC as timecounter makes system lag Message-ID: <CAHNYxxN1ftsbJpts_N1Dv8YE1xE7eZ0H2BYDPyWeA8Oou0xGqQ@mail.gmail.com> In-Reply-To: <CAHNYxxPy4K37jKzw0%2Bs_AX8ha9yeB_S3dK46s4EuXjdNbULCmQ@mail.gmail.com> References: <CAHNYxxPy4K37jKzw0%2Bs_AX8ha9yeB_S3dK46s4EuXjdNbULCmQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Fri, Jan 13, 2017 at 8:26 AM, Jia-Shiun Li <jiashiun@gmail.com> wrote: > Hi all, > > since 2 or 3 weeks ago, I noticed that my old Penryn-based Intel Pentium > T4200 notebook lagged a lot. System time was running a lot slower, > sometimes even looked like it freezed. Keystroke repeat rate was slow too. > > Since system time is slow, I tried to change timecounter from default TSC > to HPET. And it resumed normal immediately. > > Did a binary search. Turns out it was caused by r310177 "Enable EARLY_AP_STARTUP on amd64 and i386 kernels by default." r310175 does not have this issue. Removing this option from kernel config also solves it. -Jia-Shiun.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?CAHNYxxN1ftsbJpts_N1Dv8YE1xE7eZ0H2BYDPyWeA8Oou0xGqQ>