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Date: Sat, 13 Jul 2013 13:51:10 +0800
From: zengxg14 <zengxg14@gmail.com>
To: "jinho hwang" <hwang.jinho@gmail.com>, 
	dev <dev@dpdk.org>
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Subject: Re: [dpdk-dev] 1 core / 1 port receiving performance discrepancy
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<DIV>Hi:</DIV>
<DIV>&nbsp;</DIV>
<DIV>What is your burst size in rte_eth_rx_burst?</DIV>
<DIV>Can you provide the shell&nbsp;command you run, both test-pmd and you=
r=20
code?</DIV>
<DIV>&nbsp;</DIV>
<DIV>&nbsp;</DIV>
<HR style=3D"WIDTH: 210px; HEIGHT: 1px" align=3Dleft color=3D#b5c4df SIZE=
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<DIV><SPAN>
<DIV>
<DIV></DIV></DIV></SPAN></DIV>
<DIV>&nbsp;</DIV>
<DIV=20
style=3D"BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOT=
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ROUND: #efefef; COLOR: #000000; FONT-SIZE: 12px; PADDING-TOP: 8px">
<DIV><B>From:</B>&nbsp;<A href=3D"mailto:hwang.jinho@gmail.com">jinho=20
hwang</A></DIV>
<DIV><B>Date:</B>&nbsp;2013-07-12&nbsp;23:46</DIV>
<DIV><B>To:</B>&nbsp;<A href=3D"mailto:dev@dpdk.org">dev</A></DIV>
<DIV><B>Subject:</B>&nbsp;[dpdk-dev] 1 core / 1 port receiving performance=
=20
discrepancy</DIV></DIV></DIV>
<DIV>
<DIV>Hi&nbsp;Guys,</DIV>
<DIV>&nbsp;</DIV>
<DIV>I&nbsp;am&nbsp;currently&nbsp;testing&nbsp;my&nbsp;code&nbsp;with&nbs=
p;two&nbsp;machines(X5650&nbsp;@&nbsp;2.67GHz,</DIV>
<DIV>82599EB):&nbsp;one&nbsp;runs&nbsp;my&nbsp;code,&nbsp;and&nbsp;the&nbs=
p;other&nbsp;runs&nbsp;Pktgen.&nbsp;The&nbsp;first&nbsp;task</DIV>
<DIV>is&nbsp;to&nbsp;see&nbsp;how&nbsp;my&nbsp;code&nbsp;performs&nbsp;com=
paring&nbsp;to&nbsp;test-pmd.&nbsp;Both&nbsp;use&nbsp;only</DIV>
<DIV>one&nbsp;port&nbsp;with&nbsp;one&nbsp;core&nbsp;to&nbsp;receive&nbsp;=
packets.&nbsp;test-pmd&nbsp;uses&nbsp;rxonly&nbsp;mode.</DIV>
<DIV>My&nbsp;code&nbsp;only&nbsp;receives&nbsp;packets&nbsp;and&nbsp;disca=
rds&nbsp;them&nbsp;right&nbsp;away,&nbsp;and&nbsp;there</DIV>
<DIV>are&nbsp;no&nbsp;other&nbsp;processing&nbsp;at&nbsp;all.&nbsp;Differe=
nt&nbsp;from&nbsp;what&nbsp;I&nbsp;expected,</DIV>
<DIV>test-pmd&nbsp;shows&nbsp;33M&nbsp;packets&nbsp;(do&nbsp;not&nbsp;coun=
t&nbsp;on&nbsp;the&nbsp;second&nbsp;---&nbsp;just&nbsp;total</DIV>
<DIV>number&nbsp;of&nbsp;packets&nbsp;sent&nbsp;from&nbsp;Pktgen),&nbsp;wh=
ereas&nbsp;mine&nbsp;shows&nbsp;18M&nbsp;packets</DIV>
<DIV>with&nbsp;the&nbsp;same&nbsp;traffic.</DIV>
<DIV>&nbsp;</DIV>
<DIV>I&nbsp;have&nbsp;tried&nbsp;to&nbsp;configure&nbsp;many&nbsp;things&n=
bsp;such&nbsp;as&nbsp;increasing&nbsp;rx&nbsp;queue</DIV>
<DIV>size,&nbsp;increasing&nbsp;max&nbsp;packet&nbsp;receive&nbsp;buffer,&=
nbsp;but&nbsp;the&nbsp;number&nbsp;did&nbsp;not</DIV>
<DIV>make&nbsp;differences.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Can&nbsp;I&nbsp;get&nbsp;some&nbsp;help?</DIV>
<DIV>&nbsp;</DIV>
<DIV>Thank&nbsp;you,</DIV>
<DIV>&nbsp;</DIV>
<DIV>Jinho</DIV></DIV></BODY></HTML>

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