Date: Thu, 10 Feb 2011 14:35:47 +0000 From: nangergong <nangergong@gmail.com> To: Luigi Rizzo <rizzo@iet.unipi.it> Cc: freebsd-ipfw@freebsd.org Subject: Re: about "profile" in IPFW/dummynet Message-ID: <AANLkTindqzKCEBfZoNoXQs9SWXHOD=J%2BcOzTn=Tq4unJ@mail.gmail.com> In-Reply-To: <20110210072811.GA41597@onelab2.iet.unipi.it> References: <AANLkTinuPw67g=aROMMA6EwFEdvswXD-jHwySwxGvYEP@mail.gmail.com> <20110210072811.GA41597@onelab2.iet.unipi.it>
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thank you! I add "bw" in the distribution.txt. However, the problem remains. when I ping 9.161.148.72 from 9.161.150.55, the RTT<1ms are there any other problems? ----------------------------------------------------------- name distribution bw 2Mbit/s samples 100 loss-level 0.86 prob delay 0 200 # minimum overhead is 200ms 0.5 200 0.5 300 0.8 1000 0.9 1300 1 1300 #configuration file end On Thu, Feb 10, 2011 at 7:28 AM, Luigi Rizzo <rizzo@iet.unipi.it> wrote: > On Thu, Feb 10, 2011 at 12:09:09AM +0000, nangergong wrote: > > Hi, all: > > > > I want to use "profile" to simulate delays according to a empirical > delay > > distribution ( the "profile" argument can be found in > > http://fuse4bsd.creo.hu/localcgi/man-cgi.cgi?ipfw+8) > > I use the following command lines and distribution.txt, and find that > these > > command lines seem not to function. when I ping 9.161.148.72, the > RTT<1ms > > > > My question is > > 1) can "profile" be used in windows platform > > 2) are there any problems in my procedures? > > you need a non-zero bandwidth if you want to use "profile". > Also, "profile" emulates an additional transmission time > (think of channel arbitration and mac overheads) > not propagation delay. > > Finally I believe profile works on all supported platforms. > In general, the differences between FreeBSD/linux/windows are > only in areas where certain kernel features are implemented > in different ways on different platforms -- e.g. sysctl, > reinjection, matching on pid/gid or other credentials, divert. > > cheers > luigi > > > > > > my command lines are: > > > > ipfw pipe 1 config profile distribution.txt > > ipfw add 100 pipe 1 ip from 9.161.150.55 to 9.161.148.72 > > > -------------------------------------------------------------------------------------- > > if I input: ipfw pipe show > > > > the result is: > > > > 00001: unlimited 0 ms burst 0 > > profile: name "distribution" loss 0.850000 samples 100 > > q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 > > droptail > > sched 65537 type FIFO flags 0x0 0 buckets 0 active > > > > > > the content of distribution.txt is: > > > > name distribution > > samples 100 > > loss-level 0.86 > > prob delay > > 0 200 # minimum overhead is 200ms > > 0.5 200 > > 0.5 300 > > 0.8 1000 > > 0.9 1300 > > 1 1300 > > #configuration file end > > _______________________________________________ > > freebsd-ipfw@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-ipfw > > To unsubscribe, send any mail to "freebsd-ipfw-unsubscribe@freebsd.org" >
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