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author | Hagen Paul Pfeifer <hagen@jauu.net> | 2013-10-22 23:27:06 +0200 |
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committer | David S. Miller <davem@davemloft.net> | 2013-10-25 19:03:39 -0400 |
commit | 4a3ad7b3eade08ad1c760aaa4fe06a36f2584939 (patch) | |
tree | 0006fbd7b270176d09bd80e6c7095e380c693571 /net/core | |
parent | b45bd46decd947eaa3497699d450e0851d247534 (diff) | |
download | op-kernel-dev-4a3ad7b3eade08ad1c760aaa4fe06a36f2584939.zip op-kernel-dev-4a3ad7b3eade08ad1c760aaa4fe06a36f2584939.tar.gz |
netem: markov loss model transition fix
The transition from markov state "3 => lost packets within a burst
period" to "1 => successfully transmitted packets within a gap period"
has no *additional* loss event. The loss already happen for transition
from 1 -> 3, this additional loss will make things go wild.
E.g. transition probabilities:
p13: 10%
p31: 100%
Expected:
Ploss = p13 / (p13 + p31)
Ploss = ~9.09%
... but it isn't. Even worse: we get a double loss - each time.
So simple don't return true to indicate loss, rather break and return
false.
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Stefano Salsano <stefano.salsano@uniroma2.it>
Cc: Fabio Ludovici <fabio.ludovici@yahoo.it>
Signed-off-by: Hagen Paul Pfeifer <hagen@jauu.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core')
0 files changed, 0 insertions, 0 deletions