On 2017年08月29日 16:49, Jan Beulich wrote: >>>> On 29.08.17 at 06:38, <tianyu....@intel.com> wrote: >> On 2017年08月25日 22:10, Meng Xu wrote: >>> How many VCPUs for a single VM do you want to support with this patch set? >> >> Hi Meng: >> Sorry for later response. We hope to increase max vcpu number to 512. >> This also have dependency on other jobs(i.e, cpu topology, mult page >> support for ioreq server and virtual IOMMU). > > I'm sorry for repeating this, but your first and foremost goal ought > to be to address the known issues with VMs having up to 128 > vCPU-s; Andrew has been pointing this out in the past. I see no > point in pushing up the limit if even the current limit doesn't work > reliably in all cases. >
Hi Jan & Andrew: We ran some HPC benchmark(i.e, HPlinkpack, dgemm, sgemm, igemm and so on) in a huge VM with 128 vcpus(Even >255 vcpus with non-upstreamed patches) and didn't meet unreliable issue. These benchmarks run heavy workloads in VM and some of them even last several hours. -- Best regards Tianyu Lan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel