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From: Thomas Huth <1228285@bugs.launchpad.net>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [Bug 1228285] Re: e1000 nic TCP performances
Date: Wed, 18 Apr 2018 15:47:05 -0000	[thread overview]
Message-ID: <152406642607.9436.11017405199503432178.malone@wampee.canonical.com> (raw)
In-Reply-To: 20130920172123.20190.55970.malonedeb@wampee.canonical.com

Looking through old bug tickets... can you still reproduce this issue
with the latest version of QEMU? Or could we close this ticket nowadays?

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1228285

Title:
  e1000 nic TCP performances

Status in QEMU:
  Incomplete

Bug description:
  Hi,

  Here is the context :

  $ qemu -name A -m 1024 -net nic vlan=0,model=e1000 -net socket,vlan=0,listen=127.0.0.1:7000
  $ qemu -name B -m 1024 -net nic vlan=0,model=e1000 -net socket,vlan=0,connect=127.0.0.1:7000

  The bandwidth is really tiny :

      . Iperf3 reports about 30 Mb/sec
      . NetPerf reports about 50 Mb/sec

  
  With UDP sockets, there is no problem at all :

      . Iperf3 reports about 1 Gb/sec
      . NetPerf reports about 950 Mb/sec

  
  I've noticed this fact only with the e1000 NIC, not with others (rtl8139,virtio, etc.)
  I've used the main GIT version of QEMU.

  
  Thanks in advance.

  See you,
  VInce

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  parent reply	other threads:[~2018-04-18 16:07 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-09-20 17:21 [Qemu-devel] [Bug 1228285] [NEW] e1000 nic TCP performances Vincent Autefage
2013-09-23 13:43 ` Stefan Hajnoczi
2018-04-18 15:47 ` Thomas Huth [this message]
2018-06-18  4:17 ` [Qemu-devel] [Bug 1228285] " Launchpad Bug Tracker

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