Date: Sun, 11 Dec 2016 09:27:23 -0600 From: Rajil Saraswat <rajil.s@gmail.com> Cc: freebsd-virtualization@FreeBSD.org Subject: Re: Debian 8 CPU stall Message-ID: <abc9aca0-ce64-a9d9-213a-957e0a599284@gmail.com> In-Reply-To: <56863fec-d8f8-2601-811f-511cd199e82f@freebsd.org> References: <b011b080-5637-2da5-8a8a-819b7b1fabd3@gmail.com> <9c9e83a5-16c6-0ab5-0ac4-af0a54430706@freebsd.org> <6cff5bf2-9654-8627-83c4-6ab48ee763b5@gmail.com> <56863fec-d8f8-2601-811f-511cd199e82f@freebsd.org>
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On 12/11/2016 01:20 AM, Peter Grehan wrote: > Looks like a possibly lost interrupt. > > Can you check to see if this system is using APIC virtualization ? > > # sysctl -a hw.vmm.vmx.cap > ... > hw.vmm.vmx.cap.posted_interrupts: 1 > hw.vmm.vmx.cap.virtual_interrupt_delivery: 1 > > (these will be zero if APIC virtualization not in use) > > If so, one thing to try is disabling these and see if that helps. > This can be done by setting the tunable hw.vmm.vmx.use_apic_vid to 1 > (e.g. in /boot/loader.conf, or unloading vmm.ko, setting the value > with kenv, and the reloading vmm.ko) > > later, > > Peter. > > I don't seem to have that sysctl on my system. Should i create one? # sysctl -a |grep vmm kern.proc_vmmap_skip_resident_count: 0 kern.coredump_pack_vmmapinfo: 1 hw.vmm.npt.pmap_flags: 0 hw.vmm.svm.num_asids: 0 hw.vmm.svm.disable_npf_assist: 0 hw.vmm.svm.features: 4294967295 hw.vmm.svm.vmcb_clean: 959 hw.vmm.vmx.vpid_alloc_failed: 0 hw.vmm.vmx.posted_interrupt_vector: 252 hw.vmm.vmx.cap.posted_interrupts: 1 hw.vmm.vmx.cap.virtual_interrupt_delivery: 1 hw.vmm.vmx.cap.invpcid: 1 hw.vmm.vmx.cap.monitor_trap: 1 hw.vmm.vmx.cap.unrestricted_guest: 1 hw.vmm.vmx.cap.pause_exit: 1 hw.vmm.vmx.cap.halt_exit: 1 hw.vmm.vmx.initialized: 1 hw.vmm.vmx.cr4_zeros_mask: 18446744073705920512 hw.vmm.vmx.cr4_ones_mask: 8192 hw.vmm.vmx.cr0_zeros_mask: 18446744071025197056 hw.vmm.vmx.cr0_ones_mask: 32 hw.vmm.ept.pmap_flags: 1531 hw.vmm.vrtc.flag_broken_time: 1 hw.vmm.ppt.devices: 2 hw.vmm.iommu.initialized: 1 hw.vmm.bhyve_xcpuids: 72 hw.vmm.topology.cpuid_leaf_b: 1 hw.vmm.topology.cores_per_package: 1 hw.vmm.topology.threads_per_core: 1 hw.vmm.create: beavis hw.vmm.destroy: beavis hw.vmm.force_iommu: 0 hw.vmm.trace_guest_exceptions: 0 hw.vmm.ipinum: 251 hw.vmm.halt_detection: 1 Thanks, Rajil
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