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<DIV><SPAN class=268331218-26062006>
<DIV><FONT face=Arial size=2><SPAN class=284292418-13092005>Hi
ALL,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=284292418-13092005>We <SPAN
class=268331218-26062006>have</SPAN> develop<SPAN
class=268331218-26062006>ed</SPAN> a custom board mother board based
on</SPAN></FONT></DIV>
<DIV><SPAN class=284292418-13092005><FONT face=Arial><FONT size=2>MPC8541
processor <SPAN class=268331218-26062006>running</SPAN> Linux 2.6.11<SPAN
class=268331218-26062006>.</SPAN></FONT></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT face=Arial><FONT size=2><SPAN
class=268331218-26062006></SPAN></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>In our system, most of the ingress UDP
packets are retransmitted</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>with one modification to data portion of the packet
(one byte). As you </SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>see there are many copy overhead due to copy from
system to userland </SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>and vise versa which has </SPAN></FONT></SPAN><SPAN
class=284292418-13092005><FONT size=2><SPAN class=268331218-26062006>impacted
our system performance. </SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>Is there a zero-copy support for TSEC
</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>to eliminate the buffer copy from kernel to userland
and vise versa?</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>Are there any other technique that we need to do to
eliminate packet</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>coping?</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>Many thanks in advance,</SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=284292418-13092005><FONT size=2><SPAN
class=268331218-26062006>Bizhan</SPAN></FONT></SPAN></DIV></SPAN></DIV></BODY></HTML>