Tsc warp

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August undefined, 2024

WebAug 22, 2024 · EDIT: Based on the link provided by Todd, it appear that tsc is not available ... [CPU#0 -> CPU#1]: [ 0.065870] Measured 679995254538 cycles TSC warp between CPUs, turning off TSC clock. [ 0.065874] tsc: Marking TSC unstable due to check_tsc_sync_source failed [ 125.451480] Override clocksource tsc is not HRT compatible. WebThis is not called * if there is no TSC. */ static void check_tsc_warp (unsigned int timeout) {cycles_t start, now, prev, end; int i; start = rdtsc_ordered (); /* * The measurement runs for 'timeout' msecs: */ end = start + (cycles_t) tsc_khz * timeout; now = start; for (i = 0;; i ++) {/* * We take the global lock, measure TSC, save the * previous TSC that was measured …

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WebSep 6, 2024 · Measured 227738976020810 cycles TSC warp between CPUs, turning off TSC clock. Marking TSC unstable due to check_tsc_sync_source failed Override clocksource tsc is unstable and not HRT compatible - cannot switch while in HRT/NOHZ mode With the mainline Kernel Version: 4.12.9-1.el6.elrepo.x86_64 Webdelays. We see a very precise warp, for example, one system always has 182 cycles of TSC warp, another 273 cycles, and a third 469 cycles. Another is at the insanely large value of about 2^64/10, and shows some variation, but that variation is only about 0.1%. But any given system only sees warp on about half of its reboots. great granddaughter 18th birthday cards

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Web[12/37] x86/smpboot: Make TSC synchronization function call based. Message ID: [email protected] (mailing list archive) State: New: Headers: WebNext in thread: el_es: "Re: TSC Problems (warp between CPUs)" The time-stamp counter on recent Intel processors is reset to zero each time the processor package has RESET … Webmost commonly seeing this issue TSC synchronization [CPU#0 -> CPU#30]: Measured 60 cycles TSC warp between CPUs, turning off TSC clock. Marking TSC unstable due to check_tsc_sync_source failed Symptom:Red Hat Linux 6.5 and Suse Enterprise Linux 11.3 on B460 M4 4-socket configuration reports unstable TSC clock in 4 socket configuration and … flixbus west palm beach to orlando

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tsc_sync.c « kernel « x86 « arch - linux - The Linux Kernel

WebApr 2, 2024 · So this. > is very much preliminary. >. >>> And what we are seeing is unlikely to be due to cache-latency-induced. >>> delays. We see a very precise warp, for example, one … WebOct 25, 2024 · TSC synchronization [CPU#0 -> CPU#1]: Measured 3358870891203288 cycles TSC warp between CPUs, turning off TSC clock. tsc: Marking TSC unstable due to check_tsc_sync_source failed clocksource: Switched to clocksource hpet kvm: SMP vm created on host with unstable TSC; guest TSC will not be reliable great granddaughter 16th birthday cardWebHello, On Fri, 30 Nov 2007 00:26:47 +0300 Michael Tokarev wrote: > H. Peter Anvin wrote: > > Paul Rolland (ããããããã) wrote: > >> Measured 3978592228 cycles TSC warp between CPUs, turning off TSC clock. > >> Marking TSC unstable due to: check_tsc_sync_source failed. > >> but I was wondering if this is a bug or a feature ;) > > … flixbus where is my bus

"WebNov 19, 2024 · Time series classification (TSC) task is one of the most significant topics in data mining. Among all methods for this issue, the deep-learning-based shows superior performance for its good adaption to raw series data and automatic extraction of features. However, rare eyes are kept on composing ensembles of these superior individual … " - Tsc warp

Tsc warp

WebFeb 6, 2024 · Measured 255 cycles TSC warp between CPUs, turning off TSC clock. Marking TSC unstable due to check_tsc_sync_source failed Brought up 2 CPUs migration_cost=1606-- Thanks, Oliver # # Automatically generated make config: don't edit # Linux kernel version: 2.6.22.15 # Sun Dec 16 13:43:08 2007 # WebOn Wed, Mar 22, 2024 at 01:14:48PM +0800, Feng Tang wrote: > Hi, Paul > On Tue, Mar 21, 2024 at 04:23:28PM -0700, Paul E. McKenney wrote: > > Hello, Feng! > > I hope that things are going well for you and yours! > Thanks! > > First, given that the kernel can now kick out HPET instea of TSC in > > response to clock skew, does it make sense to permit …

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WebThis is not called * if there is no TSC. */ static cycles_t check_tsc_warp (unsigned int timeout) {cycles_t start, now, prev, end, cur_max_warp = 0; int i, cur_warps = 0; start = rdtsc_ordered (); /* * The measurement runs for 'timeout' msecs: */ end = start + tsc_khz * timeout; for (i = 0;; i ++) {/* * We take the global lock, measure TSC, save the * previous … WebMay 24, 2024 · Hello, I Really need some help. Posted about my SAB listing a few weeks ago about not showing up in search only when you entered the exact name. I pretty much do …

Web[PATCH] TSC: resync TSCs on AMD cpus From: Borislav Petkov Date: Mon Nov 10 2008 - 07:06:50 EST Next message: Jens Axboe: "Re: request to revert libata-convert-to-block-tagging patches" Previous message: Heiko Carstens: "Re: [Bug #11989] Suspend failure on NForce4-based boards due tochanes in stop_machine" Next in thread: Borislav Petkov: … WebCommitDate: Tue, 29 Nov 2016 17:29:49 +0100. x86/tsc: Try to adjust TSC if sync test fails. If the first CPU of a package comes online, it is necessary to test whether. the TSC is in sync with a CPU on some other package. When a deviation is. observed (time going backwards between the two CPUs) the TSC is marked.

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Web/* * Copyright (C) 2005, Ingo Molnar * * time-warp-test.c: check TSC synchronity on x86 CPUs. Also detects * gettimeofday()-level time warps. great granddaughter 1st christmas cardsWebOct 13, 2011 · I took a look at the boot log. It's the same problem as before ... Measured 2391259932 cycles TSC warp between CPUs, turning off TSC clock. HPET: 3 timers in total, 0 timers will be used for per-cpu timer Switching to clocksource hpet ... Override clocksource acpi_pm is not HRT compatible. Cannot switch while in HRT/NOHZ mode ...soft lockups... flixbus wien parisWebFeb 8, 2024 · Overhead: 161 [ 152.157564] TSC synchronization [CPU#0 -> CPU#1]: [ 152.157564] Measured 23 cycles TSC warp between CPUs, turning off TSC clock. [ … flixbus wien pragWebMar 2, 2024 · The lock-up and instability with libinput seems to co-incide with the value showing negative. Before the upgrade, it was all +ve: messages:Feb 27 12:13:19 localhost kernel: Measured 2704441868 cycles TSC warp between CPUs, turning off TSC clock. messages:Feb 27 12:31:02 localhost kernel: Measured 2704069581 cycles TSC warp … great granddaughter 1st christmas card great granddaughter 1st birthday cards ukWebIf it's available allow up to three synchronization runs and if a time warp is detected the starting CPU can compensate the time warp via the TSC_ADJUST MSR and retry. If the third run still shows a deviation or when random time warps are detected the test terminally fails. great granddaughter 1st halloweenWebMar 14, 2024 · The TSC max_warp detection code in check_tsc_warp () is very timing. sensitive. Due to the possibility of false cacheline sharing, activities done in other CPUs … flixbus wien budapest airport