Limiter with Burst or similar solution needed
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The burst setting will not be applied unless the queue is congested.
So unless you fill the pipe you will not see the effect of bursting.
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Thanks Ermal. Am I correct in saying then that if I use the settings in the attached screen shot each ip address using more than 2mb of bandwidth (i.e. congesting the queue) will be allowed to burst to the max bandwidth available on the interface until it has passed 10mb of data and then it will drop back to the 2mb rate. In real world use should this not mean that if I run a speedtest from say speedtest.net I should see it burst above 2mb then back equally if I run jperf there should be an initial burst followed by a consistent 2mb.
Many thanks
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It is per session.
So you have to congest the link with bittorrent or similar and then run speed test.
Probably there you will see the burst. -
Burst setting does not work.
I've set up a limiter with bw 2Mb and 20MB burst, however didnt see any initial burst, bw limited at 2Mb all the time since start.
I wonder if Ermal did any test at all using the burst setting, or have just assumed the other users got it all wrong. -
It seems this is getting a trend in this forum about accusing people of implementation.
Good luck with it since you earned my silence.
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Can't believe no one here can test and verify that the burst setting in LIMITER pipes is NOT working!
Yet the updates keep mentioning this feature…@ermal:
It is per session.
So you have to congest the link with bittorrent or similar and then run speed test.
Probably there you will see the burst.Here's the official FreeBSD documentation about this setting, no mention whatsoever about "link congestion":
burst size
If the data to be sent exceeds the pipe's bandwidth limit (and
the pipe was previously idle), up to size bytes of data are
allowed to bypass the dummynet scheduler, and will be sent as
fast as the physical link allows. Any additional data will be
transmitted at the rate specified by the pipe bandwidth. The
burst size depends on how long the pipe has been idle; the effec-
tive burst size is calculated as follows: MAX( size , bw * pipe_idle_time).Instead, it states that there will be a burst only if the pipe was idle (which makes sense), instead of congested.
Note: I'm using pfsense 2.1.4 - i386 version.
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We are seeing the same issue of the burst parameter being ignored.
100mbit pipe. Limiting to 12mbit per session with a 20 in the burst field. All sessions limited to 12mbit each. I have even tried a 9999 in the burst field with no result. Turning off the limiter I see a full 94mbit.
I really wish this feature worked as advertised it would be a huge win for us.
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The burst parameter is in bytes transferred, it's not a bandwidth value. You have to put 10000000 for a 10 MB burst at 100 mbps.
@mhohman:We are seeing the same issue of the burst parameter being ignored.
100mbit pipe. Limiting to 12mbit per session with a 20 in the burst field. All sessions limited to 12mbit each. I have even tried a 9999 in the burst field with no result. Turning off the limiter I see a full 94mbit.
I really wish this feature worked as advertised it would be a huge win for us.
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Unfortunately even setting it to 9999999999999999999999 has no measurable difference.
I am seeing the following when I lookup diag –> limiter info:
Limiters: 00001: 6.200 Mbit/s 0 ms burst 1 q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 droptail sched 65537 type FIFO flags 0x1 256 buckets 2 active mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000 BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp 76 ip 10.200.0.194/0 0.0.0.0/0 5 377 0 0 0 218 ip 10.200.0.137/0 0.0.0.0/0 97 18132 0 0 0 00002: 12.000 Mbit/s 0 ms burst 19531250 k q131074 50 sl. 0 flows (1 buckets) sched 65538 weight 0 lmax 0 pri 0 droptail sched 65538 type FIFO flags 0x1 256 buckets 16 active mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000 -
Yes, I've tried that also.
But unfortunately it seems no one responsible here seems to notice the problem.Unfortunately even setting it to 9999999999999999999999 has no measurable difference.
I am seeing the following when I lookup diag –> limiter info:
Limiters: 00001: 6.200 Mbit/s 0 ms burst 1 q131073 50 sl. 0 flows (1 buckets) sched 65537 weight 0 lmax 0 pri 0 droptail sched 65537 type FIFO flags 0x1 256 buckets 2 active mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000 BKT Prot ___Source IP/port____ ____Dest. IP/port____ Tot_pkt/bytes Pkt/Byte Drp 76 ip 10.200.0.194/0 0.0.0.0/0 5 377 0 0 0 218 ip 10.200.0.137/0 0.0.0.0/0 97 18132 0 0 0 00002: 12.000 Mbit/s 0 ms burst 19531250 k q131074 50 sl. 0 flows (1 buckets) sched 65538 weight 0 lmax 0 pri 0 droptail sched 65538 type FIFO flags 0x1 256 buckets 16 active mask: 0x00 0xffffffff/0x0000 -> 0x00000000/0x0000 -
I've noticed that the burst setting is no longer available on 2.3.4-RELEASE-p1. Will it come back in the future?
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its not in 2.4.2 betas maybe open a ticket
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It was removed because it is broken in dummynet and does not operate as expected. It never did work, as evidenced by all the complaints in this thread.
It isn't viable, so unless it gets changed upstream in FreeBSD, it won't be coming back.
