Tsc warp

Author: kwql

August undefined, 2024

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 … WebDec 24, 2013 · Measured 39472034539 cycles TSC warp between CPUs, turning off TSC clock. tsc: Marking TSC unstable due to check_tsc_sync_source failed Motherboard = GA-X79-UP4 revision 1.1 Bios = F4 (was already shipped with most current version). CPU = Intel core i7 4930k @ 3.4Ghz (LGA 2011)

[PATCH] hyper-v: mark TSC as unstable - narkive

WebFeb 20, 2024 · [ 0.243942] Measured 6357974304 cycles TSC warp between CPUs, turning off TSC clock. [ 0.243942] tsc: Marking TSC unstable due to check_tsc_sync_source … WebHello, 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 ;) > > … notoriously bad

LKML: Waiman Long: Re: A couple of TSC questions

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 … WebMar 2, 2024 · TSC warp on T5610 running Linux. On Linux, reading the system clock can avoid the overhead of a kernel call by using the TSC (time stamp Counter) and some … Web[12/37] x86/smpboot: Make TSC synchronization function call based. Message ID: [email protected] (mailing list archive) State: New: Headers: notoriously bad celebrity hotel guests

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Tsc warp

kernel - TSC unstable switching to hpet - Ask Ubuntu

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 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 #

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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 … 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: …

Webkernel: [ 0.09204] TSC synchronization [CPU#0 -> CPU#1]: kernel: [ 0.09204] Measured 112995559 cycles TSC warp between CPUs, turning off TSC clock. kernel: [ 0.09204] … 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 …

WebMar 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 … WebMay 5, 2015 · You should try to understand why you got the unstable message in the first place, before attempting to override. You can force the use of tsc with a command line …

WebFeb 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. [ …

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 … how to shave metal door notoriously bad sorting centersWebSep 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 how to shave men\u0027s public hairWebApr 13, 2024 · > Interesting to know. I thought most of the TSC sync problems happen > in multiple socket system. IIRC, Waiman mentioned his platform is a > Cooper Lake which is for 4S or 8S platform, also Thomas and Peter > mentioned tsc sync issue on 8S platforms in other threads. > > And your consistent warp of 182 (91 * 2) and 273 (91 * 3) cycles sound how to shave metal downWebAug 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. notoriously bad gamesWebApr 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 … notoriously bad actorsWebOct 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... how to shave men\u0027s face