similar to: [PATCH 2/4] CPUIDLE: Avoid remnant LAPIC timer intr while force hpetbroadcast

[PATCH 1/2] Support multiple C3 states. There may be multiple ACPI C3 states mapped into different CPU C-states.So made some modification to support this case. [PATCH 2/2] Handle C2 LAPIC timer & TSC stop. ACPI C2 is quite possible mapped to CPU C3 or deeper state, so thinking from worst cases, enable C3 like entry/exit handling for C2 by default. Option ''lapic_timer_c2_ok''

ACPI C2 is quite possible mapped to CPU C3 or deeper state, so thinking from worst cases, enable C3 like entry/exit handling for C2 by default. Option ''lapic_timer_c2_ok'' can be used to select simple C2 entry/exit only if the user make sure that LAPIC tmr & TSC will not be stopped during C2. Signed-off-by: Wei Gang <gang.wei@intel.com>

Hi, When using lapic as timer source the hypervisor delivers timer interrupts late. In the source xen/arch/x86/hvm/vpt.c function create_periodic_time creates a timer element with a "bonus" of 50% of the desired time until the interrupt: pt->scheduled = NOW() + period; /* * Offset LAPIC ticks from other timer ticks. Otherwise guests which use * LAPIC ticks for

Hi It seems that the Xen4.1''s HVM LAPIC clock for HVM fails to function normally, the guest OS cannot receive interrupts and Linux chooses to use PIT based TSC timer. Is there any change from Xen3.x with respect of this? Thanks - Zhefu _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel

From e2d47e2f75bac6876b7c2eaecfe946966bf27516 Mon Sep 17 00:00:00 2001 From: Liu Jinsong <jinsong.liu@intel.com> Date: Tue, 26 Nov 2013 04:53:17 +0800 Subject: [PATCH] VMX: wbinvd when vmentry under UC This patch flush cache when vmentry back to UC guest, to prevent cache polluted by hypervisor access guest memory during UC mode. However, wbinvd is a _very_ time consuming operation, so 1.

On Wed, 19 Jul 2017 16:48:23 +0800 (CST) <wang.yi59@zte.com.cn> wrote: > >* wang.yi59@zte.com.cn (wang.yi59@zte.com.cn) wrote: > > > >> Hi Eduardo, > > >> > > >> Thank you for your reply! > > >> > > >> >On Mon, Jul 17, 2017 at 09:49:37PM -0400, Yi Wang wrote: > > >> > >

In virtualized environment the APIC timer calibration could go wrong when the host is overcommitted or the guest is running nested, this would result in the APIC timers operating at an incorrect frequency. Since VMware supports a mechanism to retrieve the local APIC frequency we can ask the hypervisor for it and skip this APIC calibration loop. Signed-off-by: Renat Valiullin <rvaliullin at

In virtualized environment the APIC timer calibration could go wrong when the host is overcommitted or the guest is running nested, this would result in the APIC timers operating at an incorrect frequency. Since VMware supports a mechanism to retrieve the local APIC frequency we can ask the hypervisor for it and skip this APIC calibration loop. Signed-off-by: Renat Valiullin <rvaliullin at

Local APIC timer may stop at deep C state (C3/C4...) entry/exit. this patch add the logic that use platform timer (HPET) to reenable local APIC timer at C state entry/exit. Signed-off-by: Wei Gang <gang.wei@intel.com> Signed-off-by: Yu Ke <ke.yu@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

Hi Folks: I run into a problem when enabling Xen in next generation server platforms with Xen c/s is 21380. Xen reported "CPU Not responding" when booting up 32 CPUs( 2 sockets with 8 cores/16threads total). The log files belonging showed something wrong with APCI. So I added x2apic=0 in the xen grub line, but the symptom remained. However, Native RHEL5.5 can

> On 23 Dec 2014, at 12:59, Ian Campbell <ijc at debian.org> wrote: > > Control: reassign -1 xen-utils-common 4.4.1-6 > Control: retitle -1 /etc/init.d/xen fails when run in a guest, causing postinst to fail. > > Seems like this issue is in the Xen packages not in the xen-linux-system > metapackage, so reassigning. > > On Mon, 2014-12-22 at 23:01 +0100, Sydney

Hello, I''m trying to compile Xen unstable on NetBSD, I''ve aplied the patches from http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/sysutils/xentools41/patches/?only_with_tag=MAIN and copied the blk files from http://cvsweb.netbsd.org/bsdweb.cgi/pkgsrc/sysutils/xentools41/files/?only_with_tag=MAIN (I don''t know which of these patches have been applied to xen unstable, so

Hello Ian, i?ve tried to install "xen-linux-system-amd64" on a VMware host again and everything went fine. The Installation completes and i can boot into Xen und boot up the Dom0. So, you were right. It seems to be a problem with the initscript, but as far as i can tell, only when running xen under xen. To me, this specific issue is resolved, since the meta-package seems to install

Hi Sydney, Thanks for all the info. I'd like to have the initscript work sensibly in this scenario at some point (not for Jessie though, it's too late now) so I think we may as well keep this bug around to track that since it already contains a bunch of useful information. Thanks, Ian. On Tue, 2014-12-30 at 00:39 +0100, Sydney Meyer wrote: > Hello Ian, > > i?ve tried to

Hi! We have a problem that the dom0 very often does not boot and hangs in the hypervisor - see screenshot. The last message is: (XEN) Dom0 has maximum 16 VCPUs (afterwards xen should overwrite the memory) We are using the xen kernel from kernel.org git. Kernel is 2.6.32.24-xen with Xen 4.0.1 Hardware is HP DL380. Is this a known problem? Any hints what could be the problem and how we can

Hi! We have a problem that the dom0 very often does not boot and hangs in the hypervisor - see screenshot. The last message is: (XEN) Dom0 has maximum 16 VCPUs (afterwards xen should overwrite the memory) We are using the xen kernel from kernel.org git. Kernel is 2.6.32.24-xen with Xen 4.0.1 Hardware is HP DL380. Is this a known problem? Any hints what could be the problem and how we can

Hi, I''ve not tried pv_ops for a long time but just got a new system (Supermicro X9DRL-iF) so decided to try 3.5.0 with the latest Xen 4.2-unstable, unfortunately the system crashes immediately after loading dom0: traps.c:486:d0 Unhandled invalid opcode fault/trap [#6] on VCPU 0 [ec=0000] I''ve tried loading both bzImage and vmlinuz (gzip compressed vmlinuz) with the same

Hi Konrad, I just tried to boot a 3.8.0-rc0 kernel (last commit: 7313264b899bbf3988841296265a6e0e8a7b6521) as dom0 on my machine with current xen-unstable. The boot stalls: [ 0.000000] ACPI: PM-Timer IO Port: 0x808 [ 0.000000] ACPI: Local APIC address 0xfee00000 [ 0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x00] enabled) [ 0.000000] ACPI: LAPIC (acpi_id[0x02] lapic_id[0x01]

On Thu, 2014-05-15 at 11:01 +0100, Ian Campbell wrote: > Please can you also post Xen's own dmesg (from "xl dmesg"). Please boot with loglvl=all on the hypervisor command line for this too. Ian.

Hellow all, i need help to fix this bug: ACPI BIOS Bug: Error: A valid RSDP was not found (20120711/tbxfroot-219) Because of this first errors i get this after, and it causes don''t work USB ports and some PCI cards on the system: can''t find IRQ for PCI INT A; please try using pci=biosirq Kernel: 3.6.1-xen self compiled (work perfect without xen multiboot) Xen Version: 4.2