From: Rick Jones <rick.jones2@hp.com>
To: Jason Wang <jasowang@redhat.com>
Cc: mst@redhat.com, mashirle@us.ibm.com, krkumar2@in.ibm.com,
habanero@linux.vnet.ibm.com, rusty@rustcorp.com.au,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org, edumazet@google.com,
tahm@linux.vnet.ibm.com, jwhan@filewood.snu.ac.kr,
davem@davemloft.net, akong@redhat.com, kvm@vger.kernel.org,
sri@us.ibm.com
Subject: Re: [net-next RFC V5 0/5] Multiqueue virtio-net
Date: Mon, 09 Jul 2012 09:46:47 -0700 [thread overview]
Message-ID: <4FFB0AF7.1080604@hp.com> (raw)
In-Reply-To: <4FFA4EAD.7000707@redhat.com>
On 07/08/2012 08:23 PM, Jason Wang wrote:
> On 07/07/2012 12:23 AM, Rick Jones wrote:
>> On 07/06/2012 12:42 AM, Jason Wang wrote:
>> Which mechanism to address skew error? The netperf manual describes
>> more than one:
>
> This mechanism is missed in my test, I would add them to my test scripts.
>>
>> http://www.netperf.org/svn/netperf2/trunk/doc/netperf.html#Using-Netperf-to-Measure-Aggregate-Performance
>>
>>
>> Personally, my preference these days is to use the "demo mode" method
>> of aggregate results as it can be rather faster than (ab)using the
>> confidence intervals mechanism, which I suspect may not really scale
>> all that well to large numbers of concurrent netperfs.
>
> During my test, the confidence interval would even hard to achieved in
> RR test when I pin vhost/vcpus in the processors, so I didn't use it.
When running aggregate netperfs, *something* has to be done to address
the prospect of skew error. Otherwise the results are suspect.
happy benchmarking,
rick jones
WARNING: multiple messages have this Message-ID (diff)
From: Rick Jones <rick.jones2@hp.com>
To: Jason Wang <jasowang@redhat.com>
Cc: krkumar2@in.ibm.com, habanero@linux.vnet.ibm.com,
mashirle@us.ibm.com, kvm@vger.kernel.org, mst@redhat.com,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org, edumazet@google.com,
tahm@linux.vnet.ibm.com, jwhan@filewood.snu.ac.kr,
davem@davemloft.net, sri@us.ibm.com
Subject: Re: [net-next RFC V5 0/5] Multiqueue virtio-net
Date: Mon, 09 Jul 2012 09:46:47 -0700 [thread overview]
Message-ID: <4FFB0AF7.1080604@hp.com> (raw)
In-Reply-To: <4FFA4EAD.7000707@redhat.com>
On 07/08/2012 08:23 PM, Jason Wang wrote:
> On 07/07/2012 12:23 AM, Rick Jones wrote:
>> On 07/06/2012 12:42 AM, Jason Wang wrote:
>> Which mechanism to address skew error? The netperf manual describes
>> more than one:
>
> This mechanism is missed in my test, I would add them to my test scripts.
>>
>> http://www.netperf.org/svn/netperf2/trunk/doc/netperf.html#Using-Netperf-to-Measure-Aggregate-Performance
>>
>>
>> Personally, my preference these days is to use the "demo mode" method
>> of aggregate results as it can be rather faster than (ab)using the
>> confidence intervals mechanism, which I suspect may not really scale
>> all that well to large numbers of concurrent netperfs.
>
> During my test, the confidence interval would even hard to achieved in
> RR test when I pin vhost/vcpus in the processors, so I didn't use it.
When running aggregate netperfs, *something* has to be done to address
the prospect of skew error. Otherwise the results are suspect.
happy benchmarking,
rick jones
next prev parent reply other threads:[~2012-07-09 16:46 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-05 10:29 [net-next RFC V5 0/5] Multiqueue virtio-net Jason Wang
2012-07-05 10:29 ` Jason Wang
2012-07-05 10:29 ` [net-next RFC V5 1/5] virtio_net: Introduce VIRTIO_NET_F_MULTIQUEUE Jason Wang
2012-07-05 10:29 ` Jason Wang
2012-07-05 10:29 ` [net-next RFC V5 2/5] virtio_ring: move queue_index to vring_virtqueue Jason Wang
2012-07-05 10:29 ` Jason Wang
2012-07-05 11:40 ` Sasha Levin
2012-07-05 11:40 ` Sasha Levin
2012-07-06 3:17 ` Jason Wang
2012-07-06 3:17 ` Jason Wang
2012-07-26 8:20 ` Paolo Bonzini
2012-07-26 8:20 ` Paolo Bonzini
2012-07-30 3:30 ` Jason Wang
2012-07-30 3:30 ` Jason Wang
2012-07-05 10:29 ` [net-next RFC V5 3/5] virtio: intorduce an API to set affinity for a virtqueue Jason Wang
2012-07-05 10:29 ` Jason Wang
2012-07-27 14:38 ` Paolo Bonzini
2012-07-27 14:38 ` Paolo Bonzini
2012-07-29 20:40 ` Michael S. Tsirkin
2012-07-29 20:40 ` Michael S. Tsirkin
2012-07-30 6:27 ` Paolo Bonzini
2012-08-09 15:14 ` Paolo Bonzini
2012-08-09 15:14 ` Paolo Bonzini
2012-08-09 15:13 ` Paolo Bonzini
2012-08-09 15:13 ` Paolo Bonzini
2012-08-09 15:35 ` Avi Kivity
2012-08-09 15:35 ` Avi Kivity
2012-07-05 10:29 ` [net-next RFC V5 4/5] virtio_net: multiqueue support Jason Wang
2012-07-05 10:29 ` Jason Wang
2012-07-05 20:02 ` Amos Kong
2012-07-05 20:02 ` Amos Kong
2012-07-06 7:45 ` Jason Wang
2012-07-06 7:45 ` Jason Wang
2012-07-20 13:40 ` Michael S. Tsirkin
2012-07-20 13:40 ` Michael S. Tsirkin
2012-07-21 12:02 ` Sasha Levin
2012-07-21 12:02 ` Sasha Levin
2012-07-23 5:54 ` Jason Wang
2012-07-23 5:54 ` Jason Wang
2012-07-23 9:28 ` Sasha Levin
2012-07-23 9:28 ` Sasha Levin
2012-07-30 3:29 ` Jason Wang
2012-07-30 3:29 ` Jason Wang
2012-07-29 9:44 ` Michael S. Tsirkin
2012-07-29 9:44 ` Michael S. Tsirkin
2012-07-30 3:26 ` Jason Wang
2012-07-30 3:26 ` Jason Wang
2012-07-30 13:00 ` Sasha Levin
2012-07-30 13:00 ` Sasha Levin
2012-07-23 5:48 ` Jason Wang
2012-07-23 5:48 ` Jason Wang
2012-07-29 9:50 ` Michael S. Tsirkin
2012-07-29 9:50 ` Michael S. Tsirkin
2012-07-30 5:15 ` Jason Wang
2012-07-30 5:15 ` Jason Wang
2012-07-05 10:29 ` [net-next RFC V5 5/5] virtio_net: support negotiating the number of queues through ctrl vq Jason Wang
2012-07-05 10:29 ` Jason Wang
2012-07-05 12:51 ` Sasha Levin
2012-07-05 12:51 ` Sasha Levin
2012-07-05 20:07 ` Amos Kong
2012-07-05 20:07 ` Amos Kong
2012-07-06 7:46 ` Jason Wang
2012-07-06 7:46 ` Jason Wang
2012-07-06 3:20 ` Jason Wang
2012-07-06 3:20 ` Jason Wang
2012-07-06 6:38 ` Stephen Hemminger
2012-07-06 6:38 ` Stephen Hemminger
2012-07-06 9:26 ` Jason Wang
2012-07-06 9:26 ` Jason Wang
2012-07-06 8:10 ` Sasha Levin
2012-07-06 8:10 ` Sasha Levin
2012-07-09 20:13 ` Ben Hutchings
2012-07-09 20:13 ` Ben Hutchings
2012-07-20 12:33 ` Michael S. Tsirkin
2012-07-20 12:33 ` Michael S. Tsirkin
2012-07-23 5:32 ` Jason Wang
2012-07-23 5:32 ` Jason Wang
2012-07-05 17:45 ` [net-next RFC V5 0/5] Multiqueue virtio-net Rick Jones
2012-07-05 17:45 ` Rick Jones
2012-07-06 7:42 ` Jason Wang
2012-07-06 7:42 ` Jason Wang
2012-07-06 16:23 ` Rick Jones
2012-07-06 16:23 ` Rick Jones
2012-07-09 3:23 ` Jason Wang
2012-07-09 3:23 ` Jason Wang
2012-07-09 16:46 ` Rick Jones [this message]
2012-07-09 16:46 ` Rick Jones
2012-07-08 8:19 ` Ronen Hod
2012-07-08 8:19 ` Ronen Hod
2012-07-09 5:35 ` Jason Wang
2012-07-09 5:35 ` Jason Wang
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