Date: Wed, 20 Jan 2021 19:05:00 +0100 From: Rainer Hurling <rhurlin@gwdg.de> To: Konstantin Belousov <kostikbel@gmail.com> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: Waiting for bufdaemon Message-ID: <49e151f1-499e-9181-fde0-31591bc1a4eb@gwdg.de> In-Reply-To: <d775a50d-773c-98d2-0bff-93b1d7fab474@gwdg.de> References: <YAO9/cxnbGv5u3Bg@kib.kiev.ua> <adb9d42c-d855-1edf-a57c-9b16aad481b7@gwdg.de> <YAQINMoEi7ysBSD5@kib.kiev.ua> <1d675d77-8bdb-c285-ffa2-28330b839734@alvermark.net> <YAgDhJ9/YX29kH2a@kib.kiev.ua> <60599f75-7206-9269-ac0c-934f8f31ae26@gwdg.de> <YAgjOYdVG%2BN4lU0n@kib.kiev.ua> <d25a7608-9e61-0ece-9500-d4a80e79068e@gwdg.de> <YAgsO3AoB5PFhzDq@kib.kiev.ua> <3885bc2a-3924-cc3f-6cad-99dc6f803b0d@gwdg.de> <YAg1jCpPQd2K/zfE@kib.kiev.ua> <d775a50d-773c-98d2-0bff-93b1d7fab474@gwdg.de>
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Am 20.01.21 um 15:36 schrieb Rainer Hurling: > Am 20.01.21 um 14:52 schrieb Konstantin Belousov: >> On Wed, Jan 20, 2021 at 02:35:59PM +0100, Rainer Hurling wrote: >>> Am 20.01.21 um 14:12 schrieb Konstantin Belousov: >>>> On Wed, Jan 20, 2021 at 01:56:57PM +0100, Rainer Hurling wrote: >>>>> Am 20.01.21 um 13:34 schrieb Konstantin Belousov: >>>>>> On Wed, Jan 20, 2021 at 01:17:51PM +0100, Rainer Hurling wrote: >>>>>>> Am 20.01.21 um 11:18 schrieb Konstantin Belousov: >>>>>>>> On Wed, Jan 20, 2021 at 11:02:21AM +0100, Jakob Alvermark wrote: >>>>>>>>> This patch hides the problem for me. The system seems to work better now. >>>>>>>>> >>>>>>>>> No waiting on reboot, and the webcam works better. >>>>>>>> I am curious what do you mean by the above reference to webcam. >>>>>>>> Can you explain it with more details, even if only the impressions? >>>>>>> >>>>>>> I should mention, that beside the already discussed timing problem with >>>>>>> bufdaemon, I also have problems with several apps: >>>>>>> >>>>>>> >>>>>>> After a high system load, several programs only react very slowly (e.g. >>>>>>> Firefox). Several dockable apps from WindowMaker, but also e.g. conky do >>>>>>> not update their windows anymore, they freeze. After some time, Firefox >>>>>>> updates its screen content only after switching back from another window ... >>>>>>> >>>>>>> When such frozen programs are killed and restarted, they run normally >>>>>>> again for an indefinite time before they freeze again. >>>>>>> >>>>>>> These symptoms completely disappeared, after I patched the Ryzen box as >>>>>>> suggested on 01/17: >>>>>> >>>>>> Do you load latest microcode update from devcpu-data? >>>>> >>>>> Yes, sysutils/devcpu-data is installed and the following to lines are in >>>>> /boot/loader.conf >>>>> >>>>> cpu_microcode_load="YES" >>>>> cpu_microcode_name="/boot/firmware/intel-ucode.bin" >>>>> >>>>> But isn't this just for Intel (i387 and amd64), not AMD cpus? >>>> You need microcode_update_enable="YES" in /etc/rc.conf for late microcode >>>> update. >>>> >>>> I think that early boot update should work on AMD, bit for this you need to >>>> select and put right blob. It is enough to load late to answer my question. >>> >>> Ah, ok. Thanks for clarification. I also put cpu_microcode_load="YES" in >>> /etc/rc.conf for a late update. >>> >>> Should I try again without your patch of sys/x86/tsc.c, whether the >>> problem still occurs? > > Unfornately, without the patch from 01/17 the problem is _not_ solved. > > Next I will try your patch from today, f lib/libc/x86/sys/__vdso_gettc.c > an lib/libc/x86/sys/__vdso_gettc.c ... I can confirm that this patch also works for me on Ryzen 3950X. No more bufdaemon waitings, no frozen apps, ... > > >> Yes. >> >>> >>> >>> And for the early boot update, how do I know about the right blob? >> I am not aware of the mechanism. My best suggestion is that you match >> the blob against your CPU family/model id manually. >> >>> >>>> >>>>> >>>>>> It might be not enough, which means that additionally latest BIOS needs >>>>>> to be flushed. >>>>>> >>>>> >>>>> I am running latest Firmware F31 on a "Gigabyte\ Aorus\ X570\ Elite" >>>>> mainboard.
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