Proxmox hpet. When the kvm is booted it takes about 10% of CPU.

Proxmox hpet System is Threadripper 3960x, Asus TRX40-pro with the latest available bios, 8x8G 3200 sticks. 6 some time ago the problem with timedrifts vanished and HPET Emulation was enabled by default. Unfortunately, there are various problems when trying to qm importovf because, depending on the platform, they have custom tags which seem to confuse the 12 * version 2. com Jul 3, 2014 · To answer the original question, in my opinion there are no recommended settings for Proxmox to use or not to use HPET. They keep crashing randomly, system would just reboot. kvm-clock isn't available Another guest (Seabios) has no such issues, and happily uses kvm-clock Aug 22, 2019 · So I am noticing my windows KVM guests (managed by proxmox) are showing extremely high CPU usage when doing really simple things like watching a video on youtube. com Subject: [pve-devel] superseded: [PATCH-SERIES qemu-server 0/5] cfg2cmd: introduce dedicated module and turn off hpet timer Date: Mon, 29 Sep 2025 15:00:28 +0200 [thread overview] Message-ID: <7bc79475-8a34-439e-bfd0-ae0975daff81@proxmox. Jul 25, 2024 · I am running OpenVMS in a KVM machine on proxmox (well I was), granted it's not a supported option but I can do it ;-). Have you managed to tweak it further? May 16, 2019 · Hello! Because of another issue, I decided to check dmesg inside one of my VMs today and I saw a bunch of messages like this [21128. 737674] clocksource: wd-tsc-wd read-back delay of 129300ns, clock-skew test skipped! [21463. 12-8 to 6. On Hi guys, pretty confused here, my cpu is set to host from Proxmox GUI and shows as: cpu: host in the vm conf file. Nun bekomme ich immer die Fehlermeldung qemu-system-aarch64: Property 'virt-10. After login, when the Win10 guest is idling, the CPU Load on host varies between 15~35%. 6. Stoiko Ivanov, I 'd never find this solution! In short: I went to the BIOS (Supermicro X11SCM-F) ACPI Settings - High Precision Event Timer (HPET), and switched it from enabled (default) to disable and everything Mar 10, 2010 · Hi guys, tonight I "accidentally" found a solution for possible high load, clock skew, and/or perfomance problems for all my Proxmox Systems (mostly Dell). Changes in QEMU [2] led to slightly increased CPU usage when using hpet [3][4]: > the timer Jun 28, 2022 · Proxmox is set up along with storage to use, I have tried setting up a windows VM using an iso but get this error code when I try to start it up. When the kvm is booted it takes about 10% of CPU. My situation: Under some load (CPU or I/O), the internal clock on the Windows Guest starts to lag behind. 5 of Proxmox the HPET Emulation was disabled for Windows guests. Changes in QEMU [2] led to slightly increased CPU usage when using hpet [3] [4]: > the timer must be kept running even if not enabled, in > order to set the ISR flag, so writes to HPET_TN_CFG must > not call hpet_del_timer () Upstream suggested to not use hpet if possible [5] [6 Jun 8, 2012 · Since I have upgraded my V8. . For Windows guests the RTC can be used instead of the TSC for all time sources, which resolves guest timing issues. Add "clocksource=hpet" to your kernel(s) in your /boot/grub/menu. Jun 13, 2018 · Even tough I'm not directly running proxmox it seems like an appropriate fix for several affected systems. 4 cluster we had "hpet=disable" in the /etc/default/grub because if we don't, we get many (strange) log entries about hpet. (Great book, BTW). Is there Aug 17, 2022 · I'm getting "Marking TSC unstable due to clocksource watchdog" after some hours of uptime. Apr 1, 2019 · I initially changed the older host to hpet thinking it was referencing where the VM was created. I noticed that if I add an extra line in the conf file: args: -cpu host the VM is consistently faster (even in single core) Geekbench with only: cpu: host single core: 664 I stop and add args: -cpu host to it (keeping cpu: host). After setting hpet to yes, cpu idle load went back to pre-1803 levels. Apr 18, 2015 · This weekend I upgraded a Proxmox VE 3. Aug 15, 2024 · Proxmox should have HPET disabled by default when ostype is set to win11 (easiest way to check: ps ax|grep --color hpet=off) so perhaps try updating Boot Configuration Data using the above command and reboot. 32-2 and PVE 1. Without this parameter (default is amd_iommu=on) a kernel panic occurs: May 19, 2010 · Stability issue: hpet increasing min_delta_ns to 15000 nsec / eth0 Down Recent enough Linux versions already use 'kvm-clock' rather than 'hpet' as the default clock source [0] [1]. Cooling and temps are good, power proper with sine wave, UPS, Ram is brand new ECC, They all run off NVME for main OS. com> (raw) Jul 7, 2012 · I need hpet running in Windows 2008 R2 server in order to run VoIP applications based on Dialogic HMP 3. I could use hpet or unstable for the clocksource configuration. proxmox. 102343-6-f. 11. 4 cluster to Proxmox VE 4. Great, thanks Wasim. I can only From: Fiona Ebner <f. Everything works as expected, but on the 3. Also, I feel like 12% idle CPU usage is too much for what the server is doing. 005064] ACPI: HPET 0x00000000582FC000 000038 (v01 ALASKA A M I 01072009 AMI 01000013) [ 0. Most of these are clocksource issues, though later on there's some longer interrupts which might indicate a perf issue, though the lowering of the kernel parm only in itself affects stats gathering. No problem. After upgrading to 2. May 15, 2021 · Hallo, ich habe eine debian bookworm arm64 VM, die unter Proxmox 8 tadellos startete. After a while, it can take 5 days or sometimes 2 weeks the CPU takes double the amount of the initial boot and runs on 20% of CPU capacity. 8. com \ --cc PSA: Disable HPET (High Precision Event Timer) for smoother gameplay with more FPS. This issue happens on both AMD and Intel. com> To: pve-devel@lists. See full list on techaddressed. Jul 13, 2023 · In the hosts I use AMD Epyc 7302 CPUs and when configuring the VM with the Epyc Rome V2 CPU profile I get an error where the VM does not start. “kvm: -no-hpet: Option not supported for this target Jun 25, 2023 · Good Afternoon Proxmox Community, I am having an almost impossible time getting my gaming laptop with Proxmox installed to work with Nvidia GTX 1080 (Max Q) card to passthrough to my Windows 10 VM. com> () In-Reply-To: <> Recent enough Linux versions already use 'kvm-clock' rather than 'hpet' as the default clock source [0][1]. To enable the Mar 13, 2025 · I have tested various combinations of cpu flags, and kvm arguments, both with and without HPET, on two seperate hosts, both proxmox production and test, both Kernel 6. The CPU load of all cores increases from 16% in idle mode to about 19% (visible in Proxmox). 1-machine. 5% cpu usage with OS type Windows 10/2016 and no-hpet commented out (post #9) - ~0. I thought Oct 5, 2021 · However, this is exactly where the problem lies: In a 64-bit Windows VM with nesting enabled and operation mode "isolated core" (4 cores in Proxmox, 3 are for Windows and one for TwinCAT) the PLC can be started and runs without problems. Changes in QEMU [2] led to slightly increased CPU usage when using hpet [3] [4]: > the timer must be kept running even if not enabled, in > order to set the ISR flag, so writes to HPET_TN_CFG must > not call hpet_del_timer () Upstream suggested to not use hpet if possible [5] [6 Sep 7, 2025 · How to add precision clock device for PTP ? emulated or hardware (HPET?) or does it take external clock ? shodan Yesterday at 12:42 Aug 16, 2021 · The system runs very stable overall, but it only boots when the kernel parameter amd_iommu=off is set. 754802] clocksource: timekeeping watchdog on CPU6: hpet wd-wd read-back Jun 19, 2024 · One proxmox guest (UEFI) is reporting some clock instability trying to use tsc & throws a few events in dmesg, ending up with hpet . What I tried so far and none of that helped: - Changing CPU type to kvm64 and tried to set some specific cpu type - -machine no-hpet option, clock skew - Tried to change VirtIO SCSI to VirtIO SCSI Single - Removing PCI device (gpu passthrough) - Changing disk parameters (with iothread and Some tips from RedHat's Virtualization Host Configuration and Guest Installation Guide, if you have time drifts (mainly for windows), Using the Real-Time Clock WIN XP, WIN 2003 Server Windows uses the both the Real-Time Clock (RTC) and the Time Stamp Counter (TSC). 004082] clocksource: timekeeping watchdog on CPU46: hpet retried 2 times before success Apr 8, 2023 · I see this in my journalctl should I care about this warning or ignore it? Seems like its disabling HPET? root@HOME-SERVER:~# dmesg | grep -i hpet [ 0. com \ --to=f. 102343-1-f. When I migrated it, although the vm disk moved, I think the VM is actually recreated with the same ID and configuration and that because the newer box is on hpet, it had an issue referencing tsc. 005106] ACPI: Reserving HPET table memory at Aug 23, 2011 · Hi, first of all, many thanks to the Proxmox support, without the help from Mr. BCM does not Recent enough Linux versions already use 'kvm-clock' rather than 'hpet' as the default clock source [0] [1]. For example a 4 core KVM instance Mar 3, 2011 · Hi everybody, after some Problems last year with time drifts on 64bit Windows Guests and the use of qemu HPET Emulation, which fixed my issues, the problem started again. 8 and Kernel 6. 0 for Windows. I read from another thread that there You may reply publicly to via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: Avoid top-posting and favor interleaved quoting: * Reply using the , , and switches of git-send-email(1): git send-email \ --in-reply-to=20250929125852. 004082] clocksource: timekeeping watchdog on CPU46: hpet retried 2 times before success Aug 28, 2022 · I tried to completely remove args to check if it is the reason but I still have large host cpu usage. com Subject: Date: Mon, 29 Sep 2025 14:56:50 +0200 Message-ID: <20250929125852. It appears the server idles "a lot" higher than the previous kernel version. 12-9 I have noticed a measurable increase in power usage. Feb 11, 2021 · Hello, How can I fix weird dmesg errors : [Thu Jul 27 10:51:09 2023] clocksource: timekeeping watchdog on CPU72: hpet wd-wd read-back delay of 114190ns [Thu Jul 27 10:51:09 2023] clocksource: wd-tsc-wd read-back delay of 118311ns, clock-skew test skipped! [Thu Jul 27 10:56:04 2023] Dec 10, 2009 · I only noticed that in version 1. 8-1% cpu usage with OS type Windows 10/2016 and hv_synic and hv_stimer flags (post #11) No drawback as far as I can tell. 2-9, my idling 2 core windows 10 Pro 1803 VM gets : - ~15% cpu usage with OS type Windows 10/2016 - ~3% cpu usage with OS type Other - ~1-1. Perhaps this could Dec 1, 2019 · I'm getting "Marking TSC unstable due to clocksource watchdog" after some hours of uptime. 3 Proxmox server from kernel 6. I have two similar, if not equal, debian systems running - both among other things running win10 vms. ebner@proxmox. On idle, when the VM starts and the user does not login, the CPU Load on host varies between 3~7%, in order with all other Windows 10 guests. To get OpenVMS running inside Proxmox you need to turn off HPET otherwise it simply hangs during boot up. Geekbench (both cpu entries) single Sep 9, 2021 · On both hosts I am noticing a single Windows 10 guest "misbehaving". Sep 24, 2023 · Setting -no-hpet, or in my case setting the guest OS to "other" (should do the same thing) got it down to ~12%, but I'm still getting annoying jumps. 1. ``` [1198064. Dialogic has an utility to test if hpet is working with their drivers and it failed in KVM but it succeeded on the same machine using ESXi. 1 of the License, or (at your option) any later version. hpet' not found TASK ERROR: start failed: QEMU exited with code 1 Offenbar erzeugt proxmox beim Start immer das From: Fiona Ebner <f. Like every 6 seconds it jumps up to 30% and back down to 10%. The method used for login is irrelevant. My new proxmox server doesn't actually work, but (now) clearly this is not the reason why. Mar 6, 2022 · I am trying to migrate VMs from various existing platforms into Proxmox and they commonly allow exporting VMs either in OVF or OVA format. lst I thinks this helps all hpet-supported Systems. Nov 18, 2017 · On a HP DL120G7 E3-1220 running proxmox 5. I've followed the official tutorial, read countless proxmox forum posts, and followed other Mar 7, 2014 · Hi all, I run a kvm with some surveillance software that processes 6 streams of IP camera's. (Proxmox VNC * [pve-devel] [PATCH-SERIES qemu-server v2 0/6] cfg2cmd: introduce dedicated module and turn off hpet timer@ 2025-09-29 12:56 Fiona Ebner 2025-09-29 12:56 ` [pve-devel] [PATCH qemu-server v2 1/6] tests: cfg2cmd: add tests for startdate parameter and disabled time drift fix Fiona Ebner ` (6 more replies) 0 siblings, 7 replies; 8+ messages in thread From: Fiona Ebner @ 2025-09-29 12:56 UTC * [pve-devel] [PATCH-SERIES qemu-server 0/5] cfg2cmd: introduce dedicated module and turn off hpet timer@ 2025-09-24 14:35 Fiona Ebner 2025-09-24 14:35 ` [pve-devel] [PATCH qemu-server 1/6] tests: cfg2cmd: add tests for startdate parameter and disabled time drift fix Fiona Ebner ` (6 more replies) 0 siblings, 7 replies; 9+ messages in thread From: Fiona Ebner @ 2025-09-24 14:35 UTC (permalink * [pve-devel] [PATCH-SERIES qemu-server v2 0/6] cfg2cmd: introduce dedicated module and turn off hpet timer@ 2025-09-29 12:56 Fiona Ebner 2025-09-29 12:56 ` [pve-devel] [PATCH qemu-server v2 1/6] tests: cfg2cmd: add tests for startdate parameter and disabled time drift fix Fiona Ebner ` (6 more replies) 0 siblings, 7 replies; 8+ messages in thread From: Fiona Ebner @ 2025-09-29 12:56 UTC Jun 16, 2017 · I have multiple AMD EPYC based systems on different motherboards all brand new and having same issue. q2qinrq xg3w7q jn qybc 3zf stfq k6 g3p uqsl sfwz