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https://gitlab.com/libvirt/libvirt.git
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014208c4d0
The nodeinfo is reporting incorrect number of cpus and incorrect host topology on PPC64 KVM hosts. The KVM hypervisor on PPC64 needs only the primary thread in a core to be online, and the secondaries offlined. While scheduling a guest in, the kvm scheduler wakes up the secondaries to run in guest context. The host scheduling of the guests happen at the core level(as only primary thread is online). The kvm scheduler exploits as many threads of the core as needed by guest. Further, starting POWER8, the processor allows splitting a physical core into multiple subcores with 2 or 4 threads each. Again, only the primary thread in a subcore is online in the host. The KVM-PPC scheduler allows guests to exploit all the offline threads in the subcore, by bringing them online when needed. (Kernel patches on split-core http://www.spinics.net/lists/kvm-ppc/msg09121.html) Recently with dynamic micro-threading changes in ppc-kvm, makes sure to utilize all the offline cpus across guests, and across guests with different cpu topologies. (https://www.mail-archive.com/kvm@vger.kernel.org/msg115978.html) Since the offline cpus are brought online in the guest context, it is safe to count them as online. Nodeinfo today discounts these offline cpus from cpu count/topology calclulation, and the nodeinfo output is not of any help and the host appears overcommited when it is actually not. The patch carefully counts those offline threads whose primary threads are online. The host topology displayed by the nodeinfo is also fixed when the host is in valid kvm state. Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com> Signed-off-by: Andrea Bolognani <abologna@redhat.com> |
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| .. | ||
| access | ||
| admin | ||
| bhyve | ||
| conf | ||
| cpu | ||
| esx | ||
| hyperv | ||
| interface | ||
| libxl | ||
| locking | ||
| lxc | ||
| network | ||
| node_device | ||
| nwfilter | ||
| openvz | ||
| phyp | ||
| qemu | ||
| remote | ||
| rpc | ||
| secret | ||
| security | ||
| storage | ||
| test | ||
| uml | ||
| util | ||
| vbox | ||
| vmware | ||
| vmx | ||
| vz | ||
| xen | ||
| xenapi | ||
| xenconfig | ||
| admin_protocol-structs | ||
| check-aclperms.pl | ||
| check-aclrules.pl | ||
| check-driverimpls.pl | ||
| check-drivername.pl | ||
| check-symfile.pl | ||
| check-symsorting.pl | ||
| datatypes.c | ||
| datatypes.h | ||
| driver-hypervisor.h | ||
| driver-interface.h | ||
| driver-network.h | ||
| driver-nodedev.h | ||
| driver-nwfilter.h | ||
| driver-secret.h | ||
| driver-state.h | ||
| driver-storage.h | ||
| driver-stream.h | ||
| driver.c | ||
| driver.h | ||
| dtrace2systemtap.pl | ||
| fdstream.c | ||
| fdstream.h | ||
| gnutls_1_0_compat.h | ||
| internal.h | ||
| libvirt_admin.syms | ||
| libvirt_atomic.syms | ||
| libvirt_driver_modules.syms | ||
| libvirt_esx.syms | ||
| libvirt_gnutls.syms | ||
| libvirt_internal.h | ||
| libvirt_libssh2.syms | ||
| libvirt_linux.syms | ||
| libvirt_lxc.syms | ||
| libvirt_openvz.syms | ||
| libvirt_private.syms | ||
| libvirt_probes.d | ||
| libvirt_public.syms | ||
| libvirt_qemu_probes.d | ||
| libvirt_qemu.syms | ||
| libvirt_remote.syms | ||
| libvirt_sasl.syms | ||
| libvirt_vmware.syms | ||
| libvirt_vmx.syms | ||
| libvirt_xenconfig.syms | ||
| libvirt_xenxlconfig.syms | ||
| libvirt-admin.c | ||
| libvirt-domain-snapshot.c | ||
| libvirt-domain.c | ||
| libvirt-host.c | ||
| libvirt-interface.c | ||
| libvirt-lxc.c | ||
| libvirt-lxc.pc.in | ||
| libvirt-network.c | ||
| libvirt-nodedev.c | ||
| libvirt-nwfilter.c | ||
| libvirt-qemu.c | ||
| libvirt-qemu.pc.in | ||
| libvirt-secret.c | ||
| libvirt-storage.c | ||
| libvirt-stream.c | ||
| libvirt.c | ||
| libvirt.conf | ||
| libvirt.pc.in | ||
| lock_protocol-structs | ||
| lxc_monitor_protocol-structs | ||
| lxc_protocol-structs | ||
| Makefile.am | ||
| nodeinfo.c | ||
| nodeinfo.h | ||
| nodeinfopriv.h | ||
| qemu_protocol-structs | ||
| README | ||
| remote_protocol-structs | ||
| virkeepaliveprotocol-structs | ||
| virnetprotocol-structs | ||
libvirt library code README
===========================
The directory provides the bulk of the libvirt codebase. Everything
except for the libvirtd daemon and client tools. The build uses a
large number of libtool convenience libraries - one for each child
directory, and then links them together for the final libvirt.so,
although some bits get linked directly to libvirtd daemon instead.
The files directly in this directory are supporting the public API
entry points & data structures.
There are two core shared modules to be aware of:
* util/ - a collection of shared APIs that can be used by any
code. This directory is always in the include path
for all things built
* conf/ - APIs for parsing / manipulating all the official XML
files used by the public API. This directory is only
in the include path for driver implementation modules
* vmx/ - VMware VMX config handling (used by esx/ and vmware/)
Then there are the hypervisor implementations:
* bhyve - bhyve - The BSD Hypervisor
* esx/ - VMware ESX and GSX support using vSphere API over SOAP
* hyperv/ - Microsoft Hyper-V support using WinRM
* lxc/ - Linux Native Containers
* openvz/ - OpenVZ containers using cli tools
* phyp/ - IBM Power Hypervisor using CLI tools over SSH
* qemu/ - QEMU / KVM using qemu CLI/monitor
* remote/ - Generic libvirt native RPC client
* test/ - A "mock" driver for testing
* uml/ - User Mode Linux
* vbox/ - Virtual Box using native API
* vmware/ - VMware Workstation and Player using the vmrun tool
* xen/ - Xen using hypercalls, XenD SEXPR & XenStore
* xenapi/ - Xen using libxenserver
Finally some secondary drivers that are shared for several HVs.
Currently these are used by LXC, OpenVZ, QEMU, UML and Xen drivers.
The ESX, Hyper-V, Power Hypervisor, Remote, Test & VirtualBox drivers all
implement the secondary drivers directly
* cpu/ - CPU feature management
* interface/ - Host network interface management
* network/ - Virtual NAT networking
* nwfilter/ - Network traffic filtering rules
* node_device/ - Host device enumeration
* secret/ - Secret management
* security/ - Mandatory access control drivers
* storage/ - Storage management drivers
Since both the hypervisor and secondary drivers can be built as
dlopen()able modules, it is *FORBIDDEN* to have build dependencies
between these directories. Drivers are only allowed to depend on
the public API, and the internal APIs in the util/ and conf/
directories