[libvirt] [PATCH 0/5] Introduce the support of Intel RDT-MBM

[Han Han]

Just a reminder that libvirt binds need to be updated after patches
introduced.
Refer to libvirt python and perl bindings:
commit b0a7747
Author: Pavel Hrdina <phrdina at redhat.com>
Date:   Fri Sep 20 11:14:35 2019 +0200

    virDomainMemoryStats: include disk caches

    Introduced in libvirt 4.6.0 by commit <aee04655089>.

    Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1683516

    Signed-off-by: Pavel Hrdina <phrdina at redhat.com>
    Reviewed-by: Daniel P. Berrangé <berrange at redhat.com>

commit e562e58
Author: Daniel P. Berrangé <berrange at redhat.com>
Date:   Wed May 22 14:07:57 2019 +0100

    Add new hugetlb memory stats constants

    Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>


On Wed, Nov 13, 2019 at 6:34 PM Wang Huaqiang <huaqiang.wang at intel.com>
wrote:

> RDT is the short for Intel Resource Director Technology, consists
> of four sub-technologies until now:
>
>     -. CAT for cache allocation
>     -. CMT for cache usage monitoring
>     -. MBA for memory bandwidth allocation
>     -. MBM for memory bandwidth usage monitoring
>
> The Linux kernel interface is 'resctrl' file system, and we have
> already implemented the support of CAT, CMT and MBA, to accomplish
> the tasks such as allocating a part of shared CPU last level cache
> to particular domain vcpu or a list of vcpus and monitoring the
> usage of cache, or the task of allocating a mount of memory
> bandwidth to specify domain vcpu(s).
>
> This series is to introduce the support of MBM.
>
> Basically the interfaces are:
>
> ** Identify host capability **
>
> Similar to identify the host capability of CMT, it could be gotten
> through the result of 'virsh capabilities', if following elements
> are found, then MBM is supported:
>
>     <memory_bandwidth>
>       <monitor maxMonitors='176'>
>         <feature name='mbm_total_bytes'/>
>         <feature name='mbm_local_bytes'/>
>       </monitor>
>     </memory_bandwidth>
>
> 'mbm_total_bytes' means supporting to report the memory bandwidth
> used by the vcpu(s) of specific monitor on all CPU sockets.
>
> 'mbm_local_bytes' means supporting to report the memory bandwidth
> used by vcpu(s) that is passing through local CPU socket.
>
> ** Create monitor group**
>
> The monitor group for specific domain vcpus, for example vcpu 0-4,
> is defined in domain configuration file, in such kind of way:
>
>   <cputune>
>     <memorytune vcpus='0-4'>
>       <monitor vcpus='0-4'/>
>     </memorytune>
>   </cputune>
>
> ** Report memory usage **
>
> Introduced an option '--memory' against 'virsh domstats' command
> to show the memory bandwidth usage in such way:
> (also very similar to the format of CMT result.)
>
>     # virsh domstats --memory
>
>     Domain: 'libvirt-vm'
>         memory.bandwidth.monitor.count=4
>         memory.bandwidth.monitor.0.name=vcpus_0-4
>         memory.bandwidth.monitor.0.vcpus=0-4
>         memory.bandwidth.monitor.0.node.count=2
>         memory.bandwidth.monitor.0.node.0.id=0
>         memory.bandwidth.monitor.0.node.0.bytes.total=14201651200
>         memory.bandwidth.monitor.0.node.0.bytes.local=7369809920
>         memory.bandwidth.monitor.0.node.1.id=1
>         memory.bandwidth.monitor.0.node.1.bytes.total=188897640448
>         memory.bandwidth.monitor.0.node.1.bytes.local=170044047360
>
>
> Huaqiang (5):
>   util, resctrl: using 64bit interface instead of 32bit for counters
>   conf: showing cache/memoryBW monitor features in capabilities
>   cachetune schema: a looser check for the order of <cache> and
>     <monitor> element
>   conf: Parse dommon configure file for memorytune monitors
>   virsh: show memoryBW info in 'virsh domstats' command
>
>  docs/schemas/domaincommon.rng              |  91 +++++++++---------
>  include/libvirt/libvirt-domain.h           |   1 +
>  src/conf/capabilities.c                    |   4 +-
>  src/conf/domain_conf.c                     |  44 +++++++--
>  src/libvirt-domain.c                       |  21 +++++
>  src/qemu/qemu_driver.c                     | 103 ++++++++++++++++++++-
>  src/util/virfile.c                         |  40 ++++++++
>  src/util/virfile.h                         |   2 +
>  src/util/virresctrl.c                      |   6 +-
>  src/util/virresctrl.h                      |   2 +-
>  tests/genericxml2xmlindata/cachetune.xml   |   1 +
>  tests/genericxml2xmlindata/memorytune.xml  |   5 +
>  tests/genericxml2xmloutdata/cachetune.xml  |  34 +++++++
>  tests/genericxml2xmloutdata/memorytune.xml |  42 +++++++++
>  tests/genericxml2xmltest.c                 |   4 +-
>  tools/virsh-domain-monitor.c               |   7 ++
>  tools/virsh.pod                            |  23 ++++-
>  17 files changed, 367 insertions(+), 63 deletions(-)
>  create mode 100644 tests/genericxml2xmloutdata/cachetune.xml
>  create mode 100644 tests/genericxml2xmloutdata/memorytune.xml
>
> --
> 2.23.0
>
>
> --
> libvir-list mailing list
> libvir-list at redhat.com
> https://www.redhat.com/mailman/listinfo/libvir-list
>
>

-- 
Best regards,
-----------------------------------
Han Han
Quality Engineer
Redhat.

Email: hhan at redhat.com
Phone: +861065339333
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