From: Jonathan Morton <chromatix99@gmail.com>
To: Aaron Wood <woody77@gmail.com>
Cc: cerowrt-devel <cerowrt-devel@lists.bufferbloat.net>
Subject: Re: [Cerowrt-devel] ingress rate limiting falling short
Date: Wed, 3 Jun 2015 19:25:29 +0300 [thread overview]
Message-ID: <CAJq5cE32fEONQSP+=6DOc+RvPtA8YX5=4ZwGYPNHxDWiDz6Pig@mail.gmail.com> (raw)
In-Reply-To: <CALQXh-OjiUaStSrVAOcRodA8eGCL2eExNO76Ncu-7i3JJPRPPw@mail.gmail.com>
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Remind me: does HTB have a divide in the fast path? ARMv6 and ARMv7-A CPUs
don't have a hardware integer divide, so that can really hurt.
This is fixed I think in ARMv8 and definitely in AArch64, but divides are
still expensive instructions on any CPU.
- Jonathan Morton
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next prev parent reply other threads:[~2015-06-03 16:25 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-03 5:45 Aaron Wood
2015-06-03 6:00 ` Dave Taht
2015-06-03 15:53 ` Jonathan Morton
2015-06-03 15:58 ` Sebastian Moeller
2015-06-03 16:25 ` Jonathan Morton [this message]
2015-06-03 17:49 ` Sebastian Moeller
2015-06-03 22:16 ` Aaron Wood
2015-06-03 22:27 ` Dave Taht
2015-06-03 22:34 ` Dave Taht
2015-06-03 22:43 ` Aaron Wood
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