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Clocksource watchdog maximum allowable skew

WebAug 2, 2024 · And yes, I would have expected the additional "62.500 ms clock-skew check" message from CPU5, like we see from CPU1 and CPU4 above. However, this message will be omitted if there is a watchdog reset pending or if the clocksource has not yet been initialized. Which could well have happened in this case. WebJun 27, 2016 · [ 32.883077] clocksource: timekeeping watchdog on CPU1: Marking clocksource 'tsc' as unstable because the skew is too large: [ 32.908834] clocksource: 'tsc' cs_now: 385f4b6d1e cs_last:...

A watchdog maximum skew of 100us may still be too small for

WebJan 24, 2024 · [ 818.436160] clocksource: wd-tsc-wd read-back delay of 181880ns, clock-skew test skipped! [ 819.402962] clocksource: timekeeping watchdog on CPU338: hpet wd-wd read-back delay of 324000ns ... 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 … WebNov 12, 2024 · The current watchdog clocksource skew threshold of 50us is found to be insufficient. So it is changed back to 100us before commit 2e27e793e280 ("clocksource: Reduce clocksource-skew threshold") in patch 1. ... Even a maximum skew margin of 100us may be too small in for some systems when booting up especially if those … sage lohn xl handbuch https://needle-leafwedge.com

[PATCH v2 clocksource 2/7] clocksource: Loosen clocksource …

WebA 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 control on the threshold for marking clocksource as unstable. WebAug 9, 2024 · and that "The only way to stop the spamming is to build a kernel with a larger CONFIG_CLOCKSOURCE_WATCHDOG_MAX_SKEW_US. By default, it is 100us", so … WebJun 18, 2024 · Same result with latest BIOS 2.G0 05/13/2024, AGESA 1.2.0.7: [ 2.083493] clocksource: timekeeping watchdog on CPU3: Marking clocksource 'tsc' as unstable because the skew is too large: [ 2.083499] clocksource: 'hpet' wd_nsec: 499419688 wd_now: 1b9b8a8 wd_last: 14c9beb mask: ffffffff [ 2.083501] clocksource: 'tsc' … thiamine with alcohol withdrawal

annoying clocksource alert/warning in bash prompt periodically

Category:202525 – TSC marked unstable on AMD Ryzen 2000 - Linux kernel

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Clocksource watchdog maximum allowable skew

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

WebJul 4, 2024 · linux 后台clocksource_watchdog 线程的启动条件. 加入时钟源的时候，如果tsc时钟源不是reliable，则会在执行list_add (&cs->wd_list, &watchdog_list);，即将时钟 … 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: …

Clocksource watchdog maximum allowable skew

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http://www.wowotech.net/timer_subsystem/clocksource.html 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 …

Web# Watchdog function for clocksources to detect instabilities: config CLOCKSOURCE_WATCHDOG: bool # Architecture has extra clocksource data: config … WebApr 18, 2024 · If your hardware is not capable then this option only increases the size of the kernel image. config CLOCKSOURCE_WATCHDOG_MAX_SKEW_US int "Clocksource …

WebJan 24, 2024 · depends on CLOCKSOURCE_WATCHDOG range 50 1000 - default 100 + default 125 help Specify the maximum amount of allowable watchdog skew in … WebDec 1, 2014 · 注销clock source是注册的逆过程。. 1、注册函数1：调用者已经计算好mult和shift. 如果在驱动代码中已经根据输入频率设定好了mult和shift，那么内核的clocksource layer是不需要进行这部分的内容的计 …

WebSep 7, 2015 · It appears that the clocksource watchdog does: local_irq_disable (); csnow = cs->read (cs); wdnow = 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.

WebFeb 1, 2024 · clocksource: Add a Kconfig option for WATCHDOG_MAX_SKEW 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 … sage long term careWebApr 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 clocksource watchdog failure usually triggers a switch to the HPET clocksource after the TSC clocksource is marked unstable. In case of soft lockups, the block layer issue may only … thiamine without glucoseWeblinux 6.1.12-1. links: PTS, VCS area: main; in suites: bookworm, sid; size: 1,487,400 kB; sloc: ansic: 23,403,744; asm: 266,786; sh: 108,994; makefile: 49,709; python ... thiamine withdrawal time goatWebThe current watchdog clocksource skew threshold of 50us is found to be insufficient. So it is changed back to 100us before commit 2e27e793e280 ("clocksource: Reduce clocksource-skew threshold") in patch 1. This patch also skip the current clock skew check if the consecutive watchdog read-back delay contributes a major portion of the total delay. thiamin fachinfoWebWATCHDOG_MAX_SKEW/2. If the delay exceeds the limit, we assume that the system is just too busy. A warning will be printed to the console and the clock skew check is skipped for this round. Fixes: db3a34e17433 ("clocksource: Retry clock read if long delays detected") Fixes: 2e27e793e280 ("clocksource: Reduce clocksource-skew threshold") thiamine with lrWebClocksource watchdog maximum allowable skew (in us): 100 BPF subsystem: Enable bpf () system call: Y, SEC, STD Disable unprivileged BPF by default: N, SEC Preload BPF file system with kernel specific program and map iterators: N, DEV Preemption Model: 'Preemptible Kernel (Low-Latency Desktop)' gives best results thiamine with tpnWebFeb 13, 2024 · int "Clocksource watchdog maximum allowable skew (in μs)" depends on CLOCKSOURCE_WATCHDOG range 50 1000 - default 100 + default 125 help Specify the maximum amount of allowable watchdog skew in microseconds before reporting the … thiamine with glucose