Clocksource_watchdog

Author: pymd

August undefined, 2024

WebFor clocksources which have a mask > 32-bit. * amount. That results in a shift value of 24 for a. * clocksource with mask >= 40-bit and f >= 4GHz. That maps to. * ~ 0.06ppm granularity for NTP. * If the uncertainty margin is not specified, calculate it. * period, but bound below at 2*WATCHDOG_MAX_SKEW. Web* the watchdog marked the clocksource unstable * @tick_stable: Optional function called periodically from the watchdog * code to provide stable synchronization points * …

Linux Kernel Disables Coffee Lakes HPET On The Grounds

WebApr 4, 2024 · A clocksource watchdog failure will result in the current clocksource being marked as unstable, forcing a switch to an alternative clocksource. On x86, a … WebAug 9, 2024 · Probably solved the issue: by setting the tsc=unstable kernel boot parameter, and re-enabling HPET in the UEFI/BIOS, the Linux kernel decided to use hpet as … list of songs by nat king cole

linux - system hang with possible relevance to "clocksource tsc ...

WebFeb 22, 2010 · A linux kernel uses clocksource for doing many activities. I am doing some latency comparison benchmarking on my system and hence I would like to know the … WebOne observed example is on a Intel Baytrail platform where TSC > is the main clocksource, HPET is disabled due to a hardware bug and acpi_pm > gets selected as the watchdog clocksource. > > Calculate the maximum number of nanoseconds the watchdog clocksource can > represent without overflow and do not disqualify the main … WebSo.. if the clocksource you want to unbind is the highest rated continuous clocksource that doesn't need a watchdog (basically what's likely to be in-use and required to be unbinded), its likely to be selected as the watchdog already. ie: on a system that has only HPET/ACPI_PM, you can't unbind HPET, since its a watchdog. immergas hercules

annoying clocksource alert/warning in bash prompt …

[PATCH 0/7] jz4740 watchdog driver & platform cleanups

WebRed Hat Customer Portal - Access to 24x7 support and knowledge. Focus mode. Chapter 15. Timestamping. 15.1. Hardware Clocks. Multiprocessor systems such as NUMA or SMP have multiple instances of clock sources. The way clocks interact among themselves and the way they react to system events, such as CPU frequency scaling or entering energy ... WebMar 8, 2024 · Tue Mar 8 13:32:56 2024 kern.info kernel: [15471.543954] clocksource: timekeeping watchdog on CPU2: acpi_pm wd-wd read-back delay of 88558ns Tue Mar 8 13:32:56 2024 kern.info kernel: [15471.550963] clocksource: wd-tsc-wd read-back delay of 156165ns, clock-skew test skipped! immergas hercules condensingWebMay 20, 2024 · root@LFS:# clocksource: timekeeping watchdog on CPU0: acpi_pm wd-wd readback delay of 643744ns clocksource: wd-tsc-wd read-back delay of 182144ns, … list of songs by justin bieber

"WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 0/4] clocksource: remove obsolete drivers @ 2024-01-20 13:15 Arnd Bergmann 2024-01-20 13:15 ` [PATCH 1/4] timer: remove u300 driver Arnd Bergmann ` (4 more replies) 0 siblings, 5 replies; 16+ messages in thread From: Arnd Bergmann @ 2024-01-20 13:15 UTC … " - Clocksource_watchdog

Clocksource_watchdog

[PATCH RFC] clocksource: Detect a watchdog overflow

WebFeb 8, 2024 · [ 2.102993] tsc: Marking TSC unstable due to clocksource watchdog [ 2.103482] clocksource: Checking clocksource tsc synchronization from CPU 6 to … Web[PATCH v12 clocksource 4/5] clocksource: Reduce clocksource-skew threshold for TSC From: Paul E. McKenney Date: Fri Apr 30 2024 - 20:32:50 EST Next message: Paul E. McKenney: "[PATCH v12 clocksource 3/5] clocksource: Limit number of CPUs checked for clock synchronization" Previous message: Paul E. McKenney: "[PATCH v12 …

Did you know?

WebThen, the time window between two reads from > watchdog clocksource in cs_watchdog_read() increases, so does the > probability of the two reads being interrupted by whatever on host. Then, > sometimes, especially when there are heavy workloads in both host and TD, > the maximum number of retries in cs_watchdog_read() is exceeded and … WebJan 24, 2024 · Given that the clocksource watchdog is a continual diagnostic check with frequency of twice a second, there is no need to rush it when the system is under heavy …

Webkernel. rhel. This solution is part of Red Hat’s fast-track publication program, providing a huge library of solutions that Red Hat engineers have created while supporting our … WebIf the clocksource which should be unbound is the current clocksource and no fallback can be found, unbind returns -EBUSY. This does not support the unbinding of a clocksource which is used as the watchdog clocksource. …

WebOne observed example is on a Intel Baytrail platform where TSC > is the main clocksource, HPET is disabled due to a hardware bug and acpi_pm > gets selected as the watchdog … WebAnd it > is not necessarily a bad thing for the kernel to diagnose cases where > high-stress workloads are being run on hardware that is not designed > for this sort of use. > > Nevertheless, it is quite possible that real-world use will result in > some situation requiring that high-stress workloads run on hardware > not designed to ...

WebMay 3, 2015 · Clocksource tsc was the one being used. Then I tried acpi=off option and found that there were only two clocksources, tsc jiffies. However, tsc was not unstable …

WebSince Kernel 5.14.X I would get clocksource watchdog errors and my PC automatically switching to HPET. This is due to upstream kernel changes that imposed much stricter limits on allowed TSC jitter and clock deviation between different CPU cores. It caused repeated attempts to retry at syncing them to timeout aswell. immergas hercules miniWebSep 7, 2015 · wdnow = watchdog->read (watchdog); local_irq_enable (); If the host kernel preempts the guest between reading the. TSC and the watchdog, the resulting delta … list of songs by lynyrd skynyrdWeb[ 2685.867873] clocksource: timekeeping watchdog on CPU117: hpet read-back delay of 57269ns, attempt 4, marking unstable [46215.471228] clocksource: timekeeping watchdog on CPU8: hpet read-back delay of 61460ns, attempt 4, marking unstable Commit 2e27e793e280 ("clocksource: Reduce clocksource-skew threshold"), list of songs by mariah careyWeb[ 2685.867873] clocksource: timekeeping watchdog on CPU117: hpet read-back delay of 57269ns, attempt 4, marking unstable [46215.471228] clocksource: timekeeping … immergas hercules mini 27 scheda tecnicaWebMar 7, 2024 · + int "Clocksource watchdog maximum allowable skew (in μs)" + depends on CLOCKSOURCE_WATCHDOG + range 50 1000 + default 100 + help + Specify the maximum amount of allowable watchdog skew in + microseconds before reporting the clocksource to be unstable. + endmenu endif list of songs by michael boltonWeb*PATCH 0/7] jz4740 watchdog driver & platform cleanups @ 2024-12-28 16:29 Paul Cercueil 2024-12-28 16:29 ` [PATCH 1/7] watchdog: JZ4740: Disable clock after stopping counter Paul Cercueil ` (6 more replies) 0 siblings, 7 replies; 42+ messages in thread From: Paul Cercueil @ 2024-12-28 16:29 UTC (permalink / raw) To: Ralf Baechle, Rob Herring, … immergas hydro fs 200 installationWebJul 2, 2024 · Jun 08 10:59:54 furusato kernel: clocksource: timekeeping watchdog on CPU10: Marking clocksource 'tsc' as unstable because the skew is too large: Jun 08 10:59:54 furusato kernel: clocksource: 'hpet' wd_now: 19202418 wd_last: 1888ba30 mask: ffffffff Jun 08 10:59:54 furusato kernel: clocksource: 'tsc' cs_now: 2e0ddd6a02e cs_last: … immergas hercules 32