<DIV>if i reduce the latency then the throughput also increases. i am using ICMP_TYPE as </DIV>
<DIV>ECHO REQUEST. the ratio between the throughputs for 1ms latency and 64 ms latency</DIV>
<DIV>is 12:1 </DIV>
<DIV> </DIV>
<DIV>the ping generator and ping responder are connected directly so i don't think there are ISP issues. <BR><BR><B><I>Stephen Hemminger <shemminger@osdl.org></I></B> wrote:</DIV>
<BLOCKQUOTE class="replbq" DEFANGED_style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">On Tue, 8 Feb 2005 16:02:20 -0800 (PST)<BR>js si <NISTNET_USER@YAHOO.COM>wrote:<BR><BR>> i am trying a simple thing. i have netem running as a root qdisc on an interface and am sending ping packets to this from a packet generator. at high latency i see that the number of ping responses is less than the number of ping requests sent out.<BR><BR>What options to ping are you using (flood?).<BR><BR>Also, many/most ISP's do rate limiting on ICMP requests so if your burst rate of <BR>ping's exceed the limit, they drop some.<BR><BR>when i do <BR>> <BR>> tc -s qdisc ls dev ethnum<BR>> <BR>> i see 0 dropped and 0 overlimit. <BR>> <BR>> does this means that packets are being dropped somewhere else? but when i remove netem<BR>> the number of ping responses is equal to the number of ping requests. <BR>> <BR>> thanks. <BR>> <BR>> <BR>>
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