Date: Sat, 20 Aug 2022 18:13:57 +0000 From: Amar Takhar <verm@darkbeer.org> To: freebsd-current@freebsd.org Subject: Re: Status of Alder Lake support Message-ID: <20220820181357.GA5624@darkbeer.org> In-Reply-To: <2ba3e191-64c1-b854-3eb3-080345b56839@FreeBSD.org> References: <CAN6yY1t75UEVBK5cnvwmEopCOyKmcOEX3bRJkRnX37kPa2gkgg@mail.gmail.com> <2ba3e191-64c1-b854-3eb3-080345b56839@FreeBSD.org>
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On 2022-08-19 21:43 -0400, Alexander Motin wrote: > Hi Kevin, > > On 19.08.2022 20:50, Kevin Oberman wrote: > > What is the current state of support for Alder Lake CPUs with a mix of > > "performance" and "Efficiency"?? cores. I just received my first system > > with such a processor and will be installing FreeBSD as soon as my SSD > > arrives. I have no idea what issues I might run into. (Will it even work?) > > Generally they work. I have one in my lab since they appeared, and its > biggest problem is UEFI console screwed by ASUS, which I partially > fixed. At some BIOS versions they also broke PXE booting, but then > fixed it in later update. I have an ASUS Prime Z690-P and had this issue with 13.1 and CURRENT. > The FreeBSD scheduler still has no idea about P and E cores, just trying > to balance load equally based on cache topology (which is not symmetric > there), but it is not too bad, since cores performance is not so > dramatically different. Right now I'm running 13.1 if I enable any of my E cores I get UFS corruption everywhere so I've had to have these disabled. There is a ticket https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261169 which I just updated as I'm still having issues. > hwpmc(4) also does not differentiate P and E cores, and since they have > different counters, it means that only few universal architectural > counters are usable, which are sufficient for basic profiling though. > > There were some stability issues reported, but were solved by either > FreeBSD or BIOS update, so still not really diagnosed AFAIK. I've run into this in my situation some BIOs updates cause constant reboots especially when playing video. I also have serious audio issues with continous popping that I've been unable to solve there is a ticket for that as well: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263385#add_comment I'll give CURRENT A shot again in the next day or two to see if this is all fixed thanks for the update! Amar.
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