A little more context on why whole-process scope is needed: A QEMU domain's resource consumption is not limited to its vCPU threads. IOThreads, the emulator thread, and worker threads all perform work on behalf of the guest and consume energy. Monitoring only vCPU threads therefore leaves part of the VM's energy consumption unattributed, preventing reliable whole-VM energy accounting. Cache and memory-bandwidth monitoring and allocation have the same gap.
Managing these threads individually is not robust because some are created dynamically. Assigning QEMU to the resctrl group before thread creation uses the kernel's inheritance mechanism to cover all current and future threads. This is needed for an active customer deployment where the VM is the unit of energy accounting. The existing per-vCPU behavior remains unchanged when the vcpus attribute is specified. @Michal Prívozník<mailto:[email protected]>, since you reviewed the related resctrl fixes, would you be able to take a look at this series or suggest the right reviewer? The main question is whether whole-process scope, represented by an omitted vcpus attribute, is the right interface. Thanks, Jedrzej --------------------------------------------------------------------- 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.
