чт, 21 окт. 2021 г. в 01:28, Andrew Melnichenko <and...@daynix.com>:
> Hi, > Yes, the work is in progress. Now. I'm working with a proper solution for > the eBPF RSS helper. > Ok. Thank you! > > On Wed, Oct 20, 2021 at 3:23 PM Nikolay Shirokovskiy < > nshirokovs...@virtuozzo.com> wrote: > >> Hi, Andrew. >> >> We in Virtuozzo are interested in this functionality too. Do you plan to >> continue your work on it? >> >> Nikolay >> >> пн, 16 авг. 2021 г. в 15:00, Andrew Melnichenko <and...@daynix.com>: >> >>> Ping >>> >>> On Wed, Jul 28, 2021 at 11:17 AM Andrew Melnychenko <and...@daynix.com> >>> wrote: >>> >>>> This series of patches add RSS property support for virtio-net-pci. >>>> >>>> Virtio RSS effectively works with TAP devices, it requires additional >>>> vectors for VirtioNet, queues for TAP device, and vCPU cores. >>>> Example of device configuration: >>>> ``` >>>> <interface type="network"> >>>> <mac address="52:54:00:c4:90:25"/> >>>> <source network="default"/> >>>> <model type="virtio"/> >>>> <driver name="qemu" queues="9" rss="on" rss_hash_report="off"/> >>>> <address type="pci" domain="0x0000" bus="0x01" slot="0x00" >>>> function="0x0"/> >>>> </interface> >>>> ``` >>>> >>>> Capability "rss" enables RSS, "rss_hash_report" - enables hashes in >>>> vheader. >>>> Qemu uses eBPF program as RSS driver. >>>> For loading RSS eBPF program, the helper is used. >>>> Path to the helper is provided by Qemu through "query-helper-paths" qmp >>>> command. >>>> The helper "qemu-ebpf-rss-helper" is built with Qemu and may differ >>>> from build to build. >>>> So it's required that the Qemu should provide a proper helper path. >>>> Libvirt would call the helper and receive the program and map fd >>>> through unix socket. >>>> Fds would be passed to Qemu in "ebpf_rss_fds" property by passing to >>>> child process or unix socket. >>>> If libvirt would fail at helper call or Qemu didn't provide the path, >>>> the Qemu would be launched without "ebpf_rss_fds" property. >>>> Without "ebpf_rss_fds" property, Qemu would try to load eBPF program by >>>> itself - usually, it would require additional system permissions. >>>> Qemu may use "in-qemu" RSS as a fallback option, which will not require >>>> system >>>> permissions, but doesn't work with vhost TAP. >>>> >>>> Qemu patches: >>>> https://lists.nongnu.org/archive/html/qemu-devel/2021-07/msg03535.html >>>> >>>> Andrew Melnychenko (10): >>>> domain_conf: Added configs for RSS and Hash report. >>>> qemu_capabilities: Added capabilites for qemu's "rss" and "hash". >>>> qemu_command: Added "rss" and "hash" properties. >>>> virsocket: Added receive for multiple fds. >>>> qemu_capabilities: Added capability for qemu's "ebpf_rss_fds". >>>> qemu_capabilities: Added capability for ebpf helper path. >>>> qemu_interface: Added ebpf helper call. >>>> qemu_command: Added ebpf RSS helper call for NIC creation. >>>> qemu_hotplug: Added helper call for hotplug NIC. >>>> docs: Added descriptions for "rss" and "rss_hash_report" >>>> configurations. >>>> >>>> docs/formatdomain.rst | 16 +++++++ >>>> src/conf/domain_conf.c | 31 +++++++++++++- >>>> src/conf/domain_conf.h | 2 + >>>> src/libvirt_private.syms | 1 + >>>> src/qemu/qemu_capabilities.c | 48 +++++++++++++++++++++ >>>> src/qemu/qemu_capabilities.h | 5 +++ >>>> src/qemu/qemu_command.c | 46 +++++++++++++++++++- >>>> src/qemu/qemu_command.h | 2 + >>>> src/qemu/qemu_hotplug.c | 30 ++++++++++++- >>>> src/qemu/qemu_interface.c | 54 +++++++++++++++++++++++ >>>> src/qemu/qemu_interface.h | 2 + >>>> src/qemu/qemu_monitor.c | 9 ++++ >>>> src/qemu/qemu_monitor.h | 3 ++ >>>> src/qemu/qemu_monitor_json.c | 50 ++++++++++++++++++++++ >>>> src/qemu/qemu_monitor_json.h | 3 ++ >>>> src/qemu/qemu_validate.c | 16 +++++++ >>>> src/util/virsocket.c | 83 ++++++++++++++++++++++++++++++++++++ >>>> src/util/virsocket.h | 2 + >>>> 18 files changed, 399 insertions(+), 4 deletions(-) >>>> >>>> -- >>>> 2.31.1 >>>> >>>>