Hi Rajesh, >So, is it a bug that Virt Manager uses more Sockets by default, when i choose “Copy host CPU Configuration” ?
Bug, or feature. With a win10 client in a VM, Windows PC Health Check will complain that you do not have enough CPUs to upgrade to win11 if you have (Sockets,Cores,Threads) = (16,1,1). If you have (Sockets,Cores,Threads) = (1,16,1), Windows will allow the upgrade. Looks like a bug. On Wed, May 18, 2022 at 2:24 AM Rajesh A <rajes...@tatacommunications.com> wrote: > Hi Peter > > > > Thanks. Yes, I believe (Sockets,Cores,Threads) = (1,16,1) should be the > best performance, as the VM does not need to access the memory of another > NUMA node. > > > > So, is it a bug that Virt Manager uses more Sockets by default, when i > choose “Copy host CPU Configuration” ? > > > > regards, > > > > *Rajesh A* > Engineering Media Movement > Media Services > > > > Direct +91 44 66674575 | Mobile +91 9043011101 | IP 564575 > rajes...@tatacommunications.com > > > <http://tatacommunications.com/> > > www.tatacommunications.com > > <https://twitter.com/#!/tata_comm> > > @tata_comm <https://twitter.com/#!/tata_comm> > > > > > > *From:* Peter Zay <peterz...@gmail.com> > *Sent:* 18 May 2022 01:33 AM > *To:* Rajesh A <rajes...@tatacommunications.com> > *Cc:* qemu-disc...@nongnu.org; qemu-devel@nongnu.org; Ramya R (GIMEC) < > ramy...@tatacommunications.com>; V G ASHWINI . < > ashwini...@contractor.tatacommunications.com> > *Subject:* Re: QEMU cpu socket allocation > > > > *CAUTION*: This email originated from outside of the organization. Do not > click links or open attachments unless you recognize the sender and know > the content is safe. > > Hi Rajesh, > > > > Would the more intuitive CPU setting of (Sockets,Cores,Threads) = (1,16,1) > be ok? > > > > Thanks. > > > > > > On Tue, May 17, 2022 at 10:03 AM Rajesh A <rajes...@tatacommunications.com> > wrote: > > Hi QEMU dev > > > > Virt Manager is able to configure a QEMU VM with more CPU sockets than the > physical host has. > > For example, in the below VM, when I request 16 vCPU cores, by default it > takes as 16 Sockets with 1 core each. The host itself has only 2 Sockets. > > 1. How does QEMU allow this and how the VM works? > 2. What is the recommended configuration of Sockets/Cores/Threads for > best VM performance of a 16 core VM running on a 2 sockets host ? > > > > > > regards, > > > > *Rajesh A* > Engineering Media Movement > Media Services > > > > Direct +91 44 66674575 | Mobile +91 9043011101 | IP 564575 > rajes...@tatacommunications.com > > > > <https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Ftatacommunications.com%2F&data=05%7C01%7Crajesh.a%40tatacommunications.com%7C34740206d7594bd2c2cc08da38405798%7C202104622c5e4ec8b3e20be950f292ca%7C0%7C0%7C637884146402124571%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=RwEq2mM%2FD6EPV3weUzP1i87N7n%2Fxe619qWQzJjSYpVg%3D&reserved=0> > > www.tatacommunications.com > <https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.tatacommunications.com%2F&data=05%7C01%7Crajesh.a%40tatacommunications.com%7C34740206d7594bd2c2cc08da38405798%7C202104622c5e4ec8b3e20be950f292ca%7C0%7C0%7C637884146402124571%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=CeVSNB1CC9Dn%2BRvtUdQAH13eTvPhjyYhk%2FVaW66yy3o%3D&reserved=0> > > > <https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2F%23!%2Ftata_comm&data=05%7C01%7Crajesh.a%40tatacommunications.com%7C34740206d7594bd2c2cc08da38405798%7C202104622c5e4ec8b3e20be950f292ca%7C0%7C0%7C637884146402124571%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=Kqv3RAl3ZhDXSkPJeSJV2IRwewLPsoOf5fdVE%2BPm8iw%3D&reserved=0> > > @tata_comm > <https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Ftwitter.com%2F%23!%2Ftata_comm&data=05%7C01%7Crajesh.a%40tatacommunications.com%7C34740206d7594bd2c2cc08da38405798%7C202104622c5e4ec8b3e20be950f292ca%7C0%7C0%7C637884146402124571%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C2000%7C%7C%7C&sdata=Kqv3RAl3ZhDXSkPJeSJV2IRwewLPsoOf5fdVE%2BPm8iw%3D&reserved=0> > > > > > > > > > -- > > Peter > -- Peter
