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From: "Xu, Chenjie" <chenjie.xu@intel.com>
To: "Van Haaren, Harry" <harry.van.haaren@intel.com>,
	"users@dpdk.org" <users@dpdk.org>
Subject: Re: [dpdk-users] How to specify packet size of testpmd
Date: Fri, 10 Jul 2020 08:58:57 +0000
Message-ID: <CY4PR11MB15608DF9E9509960E1BDDCEB8A650@CY4PR11MB1560.namprd11.prod.outlook.com> (raw)
In-Reply-To: <BYAPR11MB3143512DBC09630D26B7FF7CD7640@BYAPR11MB3143.namprd11.prod.outlook.com>

Hi Harry,
Thank you for your email! I'm trying to use pktgen now. Do you know which command should be used to specify the packet size for pktgen?

Best Regards,
Xu, Chenjie

-----Original Message-----
From: Van Haaren, Harry <harry.van.haaren@intel.com> 
Sent: Thursday, July 9, 2020 5:51 PM
To: Xu, Chenjie <chenjie.xu@intel.com>; users@dpdk.org
Subject: RE: [dpdk-users] How to specify packet size of testpmd

> -----Original Message-----
> From: users <users-bounces@dpdk.org> On Behalf Of Xu, Chenjie
> Sent: Thursday, July 9, 2020 10:26 AM
> To: users@dpdk.org
> Subject: [dpdk-users] How to specify packet size of testpmd
> 
> Hi all,
> Do you know how to specify the packet size when using testpmd to test 
> the network performance?

Hi,

Usually, testpmd just forwards the packets it receives. Testpmd itself is not a "proper" traffic generator, but it does have some capabilities to send some traffic before starting its rx-tx behavior. 

The command is "start tx_first" and this will by default use a small packet size.
https://doc.dpdk.org/guides/testpmd_app_ug/testpmd_funcs.html#start-tx-first

There are a number of more powerful DPDK based traffic generators available, if you require more features. Examples are pktgen, trex, moongen.

Of course, it is also possible to modify a sample application like example/skeleton to send a specific traffic type, as your particular benchmarking might require.

> Best Regards,
> Xu, Chenjie

Hope that helps, -Harry

  reply	other threads:[~2020-07-10  8:59 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-09  9:25 Xu, Chenjie
2020-07-09  9:50 ` Van Haaren, Harry
2020-07-10  8:58   ` Xu, Chenjie [this message]
2020-07-10  9:10     ` Mishal Shah
2020-07-10  9:15       ` Xu, Chenjie
2020-07-09 21:17 ` Cliff Burdick
2020-07-10  9:06   ` Xu, Chenjie
2020-07-11  1:49     ` Johnson, Brian

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