From: Zoltan Kiss <zoltan.kiss@linaro.org>
To: "Zhangleiqiang (Trump)" <zhangleiqiang@huawei.com>,
"xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Cc: Zhuangyuxin <zhuangyuxin@huawei.com>,
"Liuji (Jeremy)" <jeremy.liu@huawei.com>,
"Luohao (brian)" <brian.luohao@huawei.com>,
"Yuzhou (C)" <vitas.yuzhou@huawei.com>,
"Xiaoding (B)" <xiaoding1@huawei.com>
Subject: Re: Significant network performance difference when different NIC MQ handles the packet
Date: Fri, 02 Jan 2015 13:28:18 +0000 [thread overview]
Message-ID: <54A69CF2.1050807@linaro.org> (raw)
In-Reply-To: <3A6795EA1206904E94BEC8EF9DF109AE23955DC4@SZXEMA512-MBX.china.huawei.com>
On 31/12/14 09:06, Zhangleiqiang (Trump) wrote:
> Hi, all:
>
> I have used pkt-gen to send udp packet (1400 bytes) from one Dom0 A to another Dom0 B each of which is connected by 10GE network. On the receive side (B)，different "ksoftirqd/x" processes will handle the packet during each testing because the nic has multiple queues. I find that if "ksoftirqd/0" handles the packet, the throughout can reach to about 7Gbps. However, when "ksoftirqd/2" handles the packet, the throughout can only reach to about 2Gbps, and for "ksoftirqd/3", the throughout can even as low as 1Gbps.
>
> I am wondering what the reason it is. Could anyone give me some hint about it ?
NUMA topology? Your card might use memory "close" to CPU core 0, but not
to the others?
Zoltan
>
> ----------
> zhangleiqiang (Trump)
>
> Best Regards
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xen.org
> http://lists.xen.org/xen-devel
>
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next prev parent reply other threads:[~2015-01-02 13:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-31 9:06 Significant network performance difference when different NIC MQ handles the packet Zhangleiqiang (Trump)
2015-01-02 13:28 ` Zoltan Kiss [this message]
2015-01-04 6:15 ` Zhangleiqiang (Trump)
2015-01-08 12:18 ` Zoltan Kiss
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