lkml.org 
[lkml]   [2012]   [Jun]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [net-next RFC V4 PATCH 0/4] Multiqueue virtio-net
    On 06/26/2012 01:49 AM, Sridhar Samudrala wrote:
    > On 6/25/2012 2:16 AM, Jason Wang wrote:
    >> Hello All:
    >>
    >> This series is an update version of multiqueue virtio-net driver
    >> based on
    >> Krishna Kumar's work to let virtio-net use multiple rx/tx queues to
    >> do the
    >> packets reception and transmission. Please review and comments.
    >>
    >> Test Environment:
    >> - Intel(R) Xeon(R) CPU E5620 @ 2.40GHz, 8 cores 2 numa nodes
    >> - Two directed connected 82599
    >>
    >> Test Summary:
    >>
    >> - Highlights: huge improvements on TCP_RR test
    >> - Lowlights: regression on small packet transmission, higher cpu
    >> utilization
    >> than single queue, need further optimization
    > Does this also scale with increased number of VMs?
    >

    Hi Sridhar:

    Good suggestions, I didn't measure them. I would run test and post them.

    Thanks

    > Thanks
    > Sridhar
    >>
    >> Analysis of the performance result:
    >>
    >> - I count the number of packets sending/receiving during the test, and
    >> multiqueue show much more ability in terms of packets per second.
    >>
    >> - For the tx regression, multiqueue send about 1-2 times of more packets
    >> compared to single queue, and the packets size were much smaller
    >> than single
    >> queue does. I suspect tcp does less batching in multiqueue, so I
    >> hack the
    >> tcp_write_xmit() to forece more batching, multiqueue works as well as
    >> singlequeue for both small transmission and throughput
    >>
    >> - I didn't pack the accelerate RFS with virtio-net in this sereis as
    >> it still
    >> need further shaping, for the one that interested in this please see:
    >> http://www.mail-archive.com/kvm@vger.kernel.org/msg64111.html
    >>
    >>
    >
    > --
    > To unsubscribe from this list: send the line "unsubscribe netdev" in
    > the body of a message to majordomo@vger.kernel.org
    > More majordomo info at http://vger.kernel.org/majordomo-info.html



    \
     
     \ /
      Last update: 2012-06-26 08:41    [W:0.028 / U:67.872 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site