* [Qemu-devel] [Bug 1228285] [NEW] e1000 nic TCP performances
@ 2013-09-20 17:21 Vincent Autefage
2013-09-23 13:43 ` Stefan Hajnoczi
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: Vincent Autefage @ 2013-09-20 17:21 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
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
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1228285
Title:
e1000 nic TCP performances
Status in QEMU:
New
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1228285/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: [Qemu-devel] [Bug 1228285] [NEW] e1000 nic TCP performances
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 ` [Qemu-devel] [Bug 1228285] " Thomas Huth
2018-06-18 4:17 ` Launchpad Bug Tracker
2 siblings, 0 replies; 4+ messages in thread
From: Stefan Hajnoczi @ 2013-09-23 13:43 UTC (permalink / raw)
To: Vincent Autefage; +Cc: qemu-devel
On Fri, Sep 20, 2013 at 05:21:23PM -0000, Vincent Autefage wrote:
> 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.
It's interesting that you see good performance over -netdev socket TCP
with the other NIC models.
I don't know what the issue would be, you'll probably need to dig
further to discover the problem. Using wireshark might be a good start.
Try to figure out where the delay is incurred and then instrument that
code to find out the cause.
Stefan
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Qemu-devel] [Bug 1228285] Re: e1000 nic TCP performances
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
2018-06-18 4:17 ` Launchpad Bug Tracker
2 siblings, 0 replies; 4+ messages in thread
From: Thomas Huth @ 2018-04-18 15:47 UTC (permalink / raw)
To: qemu-devel
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
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1228285/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread* [Qemu-devel] [Bug 1228285] Re: e1000 nic TCP performances
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 ` [Qemu-devel] [Bug 1228285] " Thomas Huth
@ 2018-06-18 4:17 ` Launchpad Bug Tracker
2 siblings, 0 replies; 4+ messages in thread
From: Launchpad Bug Tracker @ 2018-06-18 4:17 UTC (permalink / raw)
To: qemu-devel
[Expired for QEMU because there has been no activity for 60 days.]
** Changed in: qemu
Status: Incomplete => Expired
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1228285
Title:
e1000 nic TCP performances
Status in QEMU:
Expired
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
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1228285/+subscriptions
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-06-18 4:30 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
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 ` [Qemu-devel] [Bug 1228285] " Thomas Huth
2018-06-18 4:17 ` Launchpad Bug Tracker
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