qemu requires that the topology equals to the maximum vcpu count.
Document this along with the API to set maximum vcpu count and the XML
element.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1426220
Management tools may want to check whether the threshold is still set if
they missed an event. Add the data to the bulk stats API where they can
also query the current backing size at the same time.
Similarly to domainSetGuestVcpus this commit adds API which allows to
modify state of individual vcpus rather than just setting the count.
This allows to enable CPUs in specific guest NUMA nodes to achieve any
necessary configuration.
This patch adds support and documentation for
a generalized hardware cache event called cache_l1d
perf event.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
The virDomainSendProcessSignal method says the flags values
come from virDomainProcessSignalFlag, but this enum has
never existed. No flags are needed for this method.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
With current perf framework, this patch adds support and documentation
for the branch_instructions perf event.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
Adjust the spacing a bit in order to generate 'cleaner' looking output.
This matches what virDomainMemoryStats does and it creates text/code boxes
in order to list each of the stats for each category.
Only the latest APIs are fully documented and the documentation of the
older variants (which are just limited versions of the new APIs anyway)
points to the newest APIs.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1322717
During offline migration, no storage is copied. Nor disks, nor
NVRAM file, nor anything. We use qemu for that and because domain
is not running there's nobody to copy that for us.
We should document this to avoid confusing users.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1372613
Apparently, some management applications use the following code
pattern when waiting for a block job to finish:
while (1) {
virDomainGetBlockJobInfo(dom, disk, info, flags);
if (info.cur == info.end)
break;
sleep(1);
}
Problem with this approach is in its corner cases. In case of
QEMU, libvirt merely pass what has been reported on the monitor.
However, if the block job hasn't started yet, qemu reports cur ==
end == 0 which tricks mgmt apps into thinking job is complete.
The solution is to mangle cur/end values as described here [1].
1: https://www.redhat.com/archives/libvir-list/2016-September/msg00017.html
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
With current perf framework, this patch adds support and documentation
for more perf events, including cache misses, cache references, cpu cycles,
and instructions.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
QEMU reports timestamp along with other memory statistics, but this information is not saved into domain statistics.
It could be useful to determine if the data reported is fresh or not.
Balloon statistics are not reported in hrf, so no modifications are made in qemu_monitor_text.c.
Signed-off-by: Derbyshev Dmitry <dderbyshev@virtuozzo.com>
'memtotal' in virtio drivers and qemu corresponds to 'available' in libvirt.
Because of that, 'stat-available-memory' is renamed into 'usable'.
Balloon statistics are not reported in hrf, so no modifications are made in qemu_monitor_text.c.
Signed-off-by: Derbyshev Dmitry <dderbyshev@virtuozzo.com>
It may cause unwanted behaviour (of course, is there any wanted one for
that case?) so we should rather disable the possibility of doing so.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1320893
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
To allow finer-grained control of vcpu state using guest agent this API
can be used to individually set the state of the vCPU.
This will allow to better control NUMA enabled guests and/or test
various vCPU configurations.
Add a rather universal API implemented via typed params that will allow
to query the guest agent for the state and possibly other aspects of
guest vcpus.
Some Intel processor families (e.g. the Intel Xeon processor E5 v3
family) introduced some RDT (Resource Director Technology) features
to monitor or control shared resource. Among these features, MBM
(Memory Bandwidth Monitoring), which is build on the CMT (Cache
Monitoring Technology) infrastructure, provides OS/VMM a way to
monitor bandwidth from one level of cache to another.
With current perf framework, this patch adds support to perf event
for MBM.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
These API already support VIR_DOMAIN_AFFECT_* flags. But the
documentation does not mention it. Eww.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
I've noticed that these APIs are missing @flags argument. Even
though we don't have a use for them, it's our policy that every
new API must have @flags.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
API agreed on in
https://www.redhat.com/archives/libvir-list/2015-October/msg00872.html
* include/libvirt/libvirt-domain.h (virDomainGetPerfEvents,
virDomainSetPerfEvents): New declarations.
* src/libvirt_public.syms: Export new symbols.
* src/driver-hypervisor.h (virDrvDomainGetPerfEvents,
virDrvDomainSetPerfEvents): New typedefs.
* src/libvirt-domain.c: Implement virDomainGetPerfEvents and
virDomainSetPerfEvents.
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
Message-id: 1459171833-26416-2-git-send-email-qiaowei.ren@intel.com
To use post-copy one has to start the migration with
VIR_MIGRATE_POSTCOPY flag and, while migration is in progress, call
virDomainMigrateStartPostCopy() to switch from pre-copy to post-copy.
Signed-off-by: Cristian Klein <cristiklein@gmail.com>
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The VIR_DOMAIN_EVENT_ID_JOB_COMPLETED event will be triggered once a job
(such as migration) finishes and it will contain statistics for the job
as one would get by calling virDomainGetJobStats. Thanks to this event
it is now possible to get statistics of a completed migration of a
transient domain on the source host.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
We have a policy that if API may end up talking to a guest agent
it should require RW connection. We don't obey the rule in
virDomainGetTime().
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This API does not change domain state. However, we have a policy
that an API talking to a guest agent requires RW access. But that
happens only if source == VIR_DOMAIN_INTERFACE_ADDRESSES_SRC_AGENT.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This function may be called with @dconnuri == NULL, e.g. from
virDomainMigrateToURI3() if the flags are missing
VIR_MIGRATE_PEER2PEER flag. Moreover, all later functions called
from here do wrap it into NULLSTR() so why not do the same here?
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
We have few code samples there that are almost unreadable when formatted
because they are not indented properly. By indenting them they are
formatted as code and hence quite readable. Also adjust descriptions to
be comments and add semicolons so that the code sample looks like sample
of a working code.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
