On Fri, Sep 03, 2021 at 03:38:13PM +0800, wangyanan (Y) wrote: > > On 2021/9/3 15:25, Peter Maydell wrote: > > On Fri, 3 Sept 2021 at 08:05, wangyanan (Y) <wangyana...@huawei.com> wrote: > > > > > > On 2021/9/2 23:56, Peter Maydell wrote: > > > > On Tue, 24 Aug 2021 at 13:20, Yanan Wang <wangyana...@huawei.com> wrote: > > > > > This new version is based on patch series [1] which introduces some > > > > > fix and improvement for smp parsing. > > > > > > > > > > Description: > > > > > Once the view of an accurate virtual cpu topology is provided to > > > > > guest, > > > > > with a well-designed vCPU pinning to the pCPU we may get a huge > > > > > benefit, > > > > > e.g., the scheduling performance improvement. See Dario Faggioli's > > > > > research and the related performance tests in [2] for reference. > > > > > > > > > > This patch series introduces cpu topology support for ARM platform. > > > > > Both cpu-map in DT and ACPI PPTT table are introduced to store the > > > > > topology information. And we only describe the topology information > > > > > to 6.2 and newer virt machines, considering compatibility. > > > > > > > > > > patches not yet reviewed: #1 and #3. > > > > > > > > > > [1] > > > > > https://lore.kernel.org/qemu-devel/20210823122804.7692-1-wangyana...@huawei.com/ > > > > > [2] > > > > > https://kvmforum2020.sched.com/event/eE1y/virtual-topology-for-virtual-machines > > > > > -friend-or-foe-dario-faggioli-suse > > > > Hi; this series doesn't apply to current head-of-git. Is it > > > > intended to be based on some other series ? > > > > > > > Yes, it was based on the -smp parsing changes in [1] which hasn't been > > > picked yet. Given that [1] somehow affects the topology parsing results > > > which we will describe to guest, I think it may be better that [1] can be > > > merged first and then this series follows. > > OK. I'll ignore this for now; please resend once that other series > > has been accepted. > Got it.
Also, you'll likely want to rebase on Igor's acpi refactor series[*] [*] https://www.mail-archive.com/qemu-devel@nongnu.org/msg822151.html Thanks, drew > > Thanks, > Yanan > > thanks > > -- PMM > > > > . >
