Date: Sun, 26 Oct 2014 18:11:53 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-net@FreeBSD.org Subject: [Bug 194453] [dummynet] pipe config bw parameter is limited to 2Gbits per second Message-ID: <bug-194453-2472-jKg6Ofh2Lc@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-194453-2472@https.bugs.freebsd.org/bugzilla/> References: <bug-194453-2472@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194453 --- Comment #8 from boba@boba.name --- > By that i mean the following: > First of all change the internals of dummynet to opportunistically > check the timer whenever there is traffic, rather than relying on > a one-tick granularity. When dummynet was first implemented the timer > was the 8254, reading it took forever, and 250-1000us granularity was > adequate for the <10Mbit/s range it was meant to emulate. > > Second, the default parameters (1ms, 50 slots queue) limit the capacity of > a pipe to some 600 Mbit/s with 1500-byte packets. Probably the code should > print warnings if queue_capacity/tick is too far from the desired rate. > > Third, the bandwidth value is internally multiplied by other factor > in the execution of the scheduling algorithms. If you bump the data type > from 31 to 32 or 64 bits, you also need to check that the other computations > do not overflow. > > In any case if you decide to go through this route please pass the code > by me for review before committing. -- luigi As I understood, this new framework in FreeBSD now can handle 10GB of traffic (http://info.iet.unipi.it/~luigi/netmap/) and supports pipes and dummynet. Is it production-stable ? Is there some sort of "how-to" on how to use it ? boba. -- You are receiving this mail because: You are the assignee for the bug.
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