From: Dave Taht <dave.taht@gmail.com>
To: cerowrt-devel@lists.bufferbloat.net
Subject: [Cerowrt-devel] rounding errors in sch_pie currently
Date: Sun, 16 Jun 2013 14:26:57 -0700 [thread overview]
Message-ID: <CAA93jw7sfRre43wKpch2X0sQLr=bgGY1+hy13-08Vedd5+qi=Q@mail.gmail.com> (raw)
In my modified pie a rounding error is introduced with the HZ values
cerowrt uses (I think it's 250, but would have to check)
target=20 becomes target=23
target=10 becomes target=11
I still haven't got around to checking the code against the paper,
which I'll start doing this week.
root@CMTS: tc qdisc add dev se00 root pie
root@CMTS: tc qdisc show dev se00
qdisc pie 8001: root refcnt 2 limit 1000p target 23 tupdate 31 alpha 2
beta 20 bytemode 1 ecn
root@CMTS:~# tc qdisc del dev se00 root
root@CMTS:~# tc qdisc add dev se00 root pie target 10
root@CMTS:~# tc qdisc show dev se00
qdisc pie 8002: root refcnt 2 limit 1000p target 11 tupdate 31 alpha 2
beta 20 bytemode 1 ecn
--
Dave Täht
Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html
reply other threads:[~2013-06-16 21:26 UTC|newest]
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