[ovirt-users] Re: Low Performance (KVM Vs VMware Hypervisor) When running multi-process application

Hi Arman, Intel(R) Xeon(R) Gold 6126 CPU @ 2.60GHz *The VM is configured for host CPU pass through and pinned to 6 CPUs.* Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 6 On-line CPU(s) list: 0-5 Thread(s) per core: 1 Core(s) per socket: 1 Socket(s): 6 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 85 Model name: Intel(R) Xeon(R) Gold 6126 CPU @ 2.60GHz Stepping: 4 CPU MHz: 2593.906 BogoMIPS: 5187.81 Hypervisor vendor: KVM Virtualization type: full L1d cache: 32K L1i cache: 32K L2 cache: 4096K L3 cache: 16384K NUMA node0 CPU(s): 0-5 Thank You -RY On Tue, Sep 15, 2020 at 6:21 PM Arman Khalatyan <arm2arm(a)gmail.com&gt; wrote: > what kind of CPUs are you using? > > > Rav Ya <ravin.ya90(a)gmail.com&gt; schrieb am Di., 15. Sept. 2020, 16:58: > >> Hello Everyone, >> Please advice. Any help will be highly appreciated. Thank you in advance. >> Test Setup: >> >> 1. oVirt Centos 7.8 Virtulization Host >> 2. Guest VM Centos 7.8 (Mutiqueue enabled 6 vCPUs with 6 Rx Tx >> Queues) >> 3. The vCPUs are configured for host pass through (Pinned CPU). >> >> The Guest VM runs the application in userspace. The Application consists >> of the parent process that reads packets in raw socket mode from the >> interface and forwards then to child processes (~vCPUs) via IPC (shared >> memory – pipes). *The performance (throughput / CPU utilization) that I >> get with KVM is half of what I get with VMware.* >> >> Any thoughts on the below observations? Any suggestions? >> >> >> - KVM Guest VMs degraded performance when running multi-process >> applications. >> - High FUTEX time (Seen on the Guest VM when passing traffic). >> - *High SY: *System CPU time spent in kernel space (Seen on both >> Hypervisor and the Guest VMs only when running my application.) >> >> >> -Rav Ya >> >> _______________________________________________ >> Users mailing list -- users(a)ovirt.org >> To unsubscribe send an email to users-leave(a)ovirt.org >> Privacy Statement: https://www.ovirt.org/privacy-policy.html >> oVirt Code of Conduct: >> https://www.ovirt.org/community/about/community-guidelines/ >> List Archives: >> https://lists.ovirt.org/archives/list/users@ovirt.org/message/QSEUE5VM4UC... >> >