Resctrl support in libvirt currently requires allocations and monitors to be associated with a set of vCPUs. This does not accurately model QEMU resource consumption, as IOThreads, worker threads and emulator threads also consume cache, memory bandwidth and energy. This series introduces a whole-process resctrl scope, allowing ``cachetune``, ``memorytune``, ``energytune`` and ``monitor`` elements to omit the ``vcpus`` attribute and apply to the entire QEMU emulator process. By placing the emulator process into the resctrl group before thread creation, all subsequently created threads inherit the same resctrl configuration. Major design choices: * A resctrl allocation or monitor without a ``vcpus`` attribute is treated as a whole-process group. * Whole-process allocations and per-vCPU allocations are mutually exclusive within a domain to avoid ambiguous resource assignment. * Whole-process monitors require a whole-process allocation of the same resource type and are unique per resource. * Monitors without ``vcpus`` inherit the scope of their parent allocation. Under a whole-process allocation they monitor the whole process; under a per-vCPU allocation they monitor the allocation's vCPU set. This reflects the dependency between resctrl monitoring and allocation groups. * Whole-process resctrl groups are created by placing the QEMU process into the target group before thread creation, allowing all subsequently created threads to inherit the same resctrl configuration. The series also updates XML validation, fixes resctrl monitor statistics reporting, and cleans up monitor domstats output. Jedrzej Wasiukiewicz (6): conf: allow omitting vcpus in cachetune/memorytune/energytune conf: implement whole-process resctrl scope qemu: assign whole-process resctrl groups at domain start qemu: fix resctrl monitor stats reporting the wrong group name qemu: clean up resctrl monitor domstats NEWS: Document whole-process resctrl support NEWS.rst | 11 + docs/formatdomain.rst | 57 +++-- src/conf/domain_conf.c | 231 ++++++++++++------ src/conf/domain_conf.h | 2 + src/conf/schemas/domaincommon.rng | 48 ++-- src/libvirt_private.syms | 1 + src/qemu/qemu_driver.c | 29 ++- src/qemu/qemu_process.c | 40 ++- src/util/virresctrl.c | 20 +- src/util/virresctrl.h | 3 + .../cachetune-monitor-empty-vcpus.xml | 30 +++ .../cachetune-monitor-inherit-alloc.xml | 30 +++ .../cachetune-wholeprocess-duplicate.xml | 32 +++ ...chetune-wholeprocess-monitor-duplicate.xml | 31 +++ .../cachetune-wholeprocess-monitors.xml | 31 +++ .../energytune-colliding-monitor.xml | 30 +++ .../energytune-wholeprocess.xml | 29 +++ .../memorytune-wholeprocess.xml | 29 +++ .../resctrl-wholeprocess-alloc-monitor.xml | 32 +++ .../resctrl-wholeprocess-layering.xml | 32 +++ .../resctrl-wholeprocess-monitors.xml | 33 +++ .../cachetune-monitor-inherit-alloc.xml | 30 +++ tests/genericxml2xmltest.c | 11 + 23 files changed, 694 insertions(+), 128 deletions(-) create mode 100644 tests/genericxml2xmlindata/cachetune-monitor-empty-vcpus.xml create mode 100644 tests/genericxml2xmlindata/cachetune-monitor-inherit-alloc.xml create mode 100644 tests/genericxml2xmlindata/cachetune-wholeprocess-duplicate.xml create mode 100644 tests/genericxml2xmlindata/cachetune-wholeprocess-monitor-duplicate.xml create mode 100644 tests/genericxml2xmlindata/cachetune-wholeprocess-monitors.xml create mode 100644 tests/genericxml2xmlindata/energytune-colliding-monitor.xml create mode 100644 tests/genericxml2xmlindata/energytune-wholeprocess.xml create mode 100644 tests/genericxml2xmlindata/memorytune-wholeprocess.xml create mode 100644 tests/genericxml2xmlindata/resctrl-wholeprocess-alloc-monitor.xml create mode 100644 tests/genericxml2xmlindata/resctrl-wholeprocess-layering.xml create mode 100644 tests/genericxml2xmlindata/resctrl-wholeprocess-monitors.xml create mode 100644 tests/genericxml2xmloutdata/cachetune-monitor-inherit-alloc.xml -- 2.43.0 --------------------------------------------------------------------- Intel Technology Poland sp. z o.o. ul. Slowackiego 173 | 80-298 Gdansk | Sad Rejonowy Gdansk Polnoc | VII Wydzial Gospodarczy Krajowego Rejestru Sadowego - KRS 101882 | NIP 957-07-52-316 | Kapital zakladowy 200.000 PLN. Spolka oswiadcza, ze posiada status duzego przedsiebiorcy w rozumieniu ustawy z dnia 8 marca 2013 r. o przeciwdzialaniu nadmiernym opoznieniom w transakcjach handlowych. Ta wiadomosc wraz z zalacznikami jest przeznaczona dla okreslonego adresata i moze zawierac informacje poufne. W razie przypadkowego otrzymania tej wiadomosci, prosimy o powiadomienie nadawcy oraz trwale jej usuniecie; jakiekolwiek przegladanie lub rozpowszechnianie jest zabronione. This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). If you are not the intended recipient, please contact the sender and delete all copies; any review or distribution by others is strictly prohibited.