2024 Clocksource

Clocksource_watchdog

Author: rizc

August undefined, 2024

WebJun 18, 2024 · (In reply to Artem S. Tashkinov from comment #1) > Could you try updating BIOS to the latest version? > > Could you try adding tsc=unstable to kernel boot arguments? > > There's bug 203183 where people experience the same issue, you may wanna > check it out. Same result with latest BIOS 2.G0 05/13/2024, AGESA 1.2.0.7: [ 2.083493] … 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 …

[PATCH] clocksource: tsc: respect tsc bootparam for clocksource …

WebMar 22, 2024 · Clocksource watchdog has been found responsible for generating latency spikes (in the 10-20 us range) when woken up to check for TSC stability. Add an option to disable it at boot. Signed-off-by: Juri Lelli Signed-off-by: Thomas Gleixner WebIssue. Soft lockup occurs with below logs: Raw. [15013187.660325] CPU6 has been hot-added [15013187.663126] CPU7 has been hot-added [15013187.663454] CPU8 has been hot-added [15013187.663927] CPU9 has been hot-added [15013187.673920] smpboot: Booting Node 0 Processor 7 APIC 0x7 [15013188.089777] kvm-clock: cpu 7, msr … the unthinking majority meaning

LKML: "Paul E. McKenney": Re: [clocksource] 8901ecc231: stress …

Webwdnow = watchdog->read (watchdog); local_irq_enable (); If the host kernel preempts the guest between reading the. TSC and the watchdog, the resulting delta may go well over. the watchdog threshold, which is currently 62ms. Correct this issue by reading "wdnow" before and after reading. TSC, and retry if the delta between the two reads exceeds. WebAug 2, 2024 · > [ 504.568821] clocksource: timekeeping watchdog on CPU5: hpet read-back delay of 554880ns, attempt 4, coarse-grained skew check followed by re-initialization Up to this point, the clocksource passed the coarse-grained checks. WebThe kernel’s command-line parameters¶. The following is a consolidated list of the kernel parameters as implemented by the __setup(), early_param(), core_param() and module_param() macros and sorted into English Dictionary order (defined as ignoring all punctuation and sorting digits before letters in a case insensitive manner), and with … the unthinkable movie plot

Re: [clocksource] 8901ecc231: stress-ng.lockbus.ops_per_sec

Re: [PATCH-rcu] clocksource: Add a Kconfig option for WATCHDOG…

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. WebSpecify the maximum amount of allowable watchdog skew in microseconds before reporting the clocksource to be unstable. The default is based on a half-second … the untilled field \u0026 the lakeWebSep 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 … the untied shoelaces show

"WebDec 10, 2012 · Edit 1: After git log search all the new changes related to "clocksource" in the current Linux kernel tree, it turns out there's a HUGE amount of changes regarding clocksources. This looks hard to track down an existing fix that might be the applicable to my problem. Edit 3: Thanks @thkala. " - Clocksource_watchdog

Clocksource_watchdog

202525 – TSC marked unstable on AMD Ryzen 2000

WebNov 18, 2024 · A watchdog implements that vigilance while comparing periodically a delta from two TSC snapshots against the delta from two equivalent snapshots of a … WebJul 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: …

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WebJul 30, 2024 · current_clocksource shows clocksource system is using currently. Using echo xxx > current_clocksource can change current clocksource( jiffies is the default … Web[ 1.450918] clocksource: timekeeping watchdog on CPU1: Marking clocksource 'tsc' as unstable because the skew is too large: [ 1.451183] clocksource: 'refined-jiffies' wd_now: ffff8bcd wd_last: ffff8b9b mask: ffffffff [ 1.451332] clocksource: 'tsc' cs_now: ac1cfb3e87236 cs_last: ac1cfae8d5893 mask: ffffffffffffffff ...

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 … 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. …

WebMar 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 WebOn Sun, Dec 05, 2024 at 10:38:15PM -0500, Waiman Long wrote: > A watchdog maximum skew of 100us may still be too small for > some systems or archs. It may also be too small when some kernel > debug config options are enabled. So add a new Kconfig option > CLOCKSOURCE_WATCHDOG_MAX_SKEW_US to allow kernel builders to have more …

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 …

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 … the untieable knotWebFeb 13, 2024 · CLOCKSOURCE_WATCHDOG_MAX_SKEW_US Kconfig option to 125 microseconds of skew per second, resulting in 500 microseconds of skew per second in … the untimely death of brad lyricsWebIf CPU is very busy during boot, the watchdog clocksource may not be read frequently enough, resulting in a large difference that is treated as "negative" by clocksource_delta() and incorrectly truncated to 0. This false alarm causes TSC to be declared unstable: clocksource: timekeeping watchdog on CPU1: Marking clocksource the untimely death of anne hecheWebJun 3, 2016 · C: templates P: major Priority: major. Between "default" and "critical" in severity. privacy This issue pertains to data or information privacy through technological means. T: bug Type: bug report. A problem or defect resulting in unintended behavior in something that exists. the untiming of ben and ruby episode 2Webkernel. 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 … the untimely giftWeb[ 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"), the untimely deathWebAnd 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 ... the untimely meditations