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From: Cheng Kevin <k5896246@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] DPDK testpmd, Virtual Disk IO limitation
Date: Wed, 25 Mar 2015 22:06:48 +0800	[thread overview]
Message-ID: <CACnuE8Fynh9PNekD5jLamTfnzp1E-9r11MwnLqP_u+n8wdE22Q@mail.gmail.com> (raw)

Hi all,

   I am a beginner of DPDK. Recently, i am interest in DPDK vHost app -
testpmd.

   And i have been tracing on testpmd.c and iofwd.c for a while.

   Also add some code inside iofwd.c for storing the payload of packets.

   Everything goes fine, and the performance is great as expected.

   But when i use fwrite to store the payload into a file,

   the performance decrease from 800mbps to 3mbps (input stream is 1 Gbps).

   Is is caused by the limitation of Virtual Disk IO? How can i solve it?

   I have tried to search the answer, some people say "pthread" might solve
the problem.

   Can someone give me some hint, i really appreciate for your help.


Best Regard,

Kevin Cheng

             reply	other threads:[~2015-03-25 14:06 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-25 14:06 Cheng Kevin [this message]
2015-03-25 15:01 ` Bruce Richardson
2015-03-25 16:20   ` Cheng Kevin
2015-03-25 17:32     ` Bruce Richardson
2015-03-25 23:47       ` Cheng Kevin

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