From: Rick Jones <rick.jones2@hp.com>
To: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Cc: bloat@lists.bufferbloat.net
Subject: Re: [Bloat] Best practices for paced TCP on Linux?
Date: Fri, 13 Apr 2012 17:35:40 -0700 [thread overview]
Message-ID: <4F88C65C.80209@hp.com> (raw)
In-Reply-To: <20120406222138.GB12641@uio.no>
On 04/06/2012 03:21 PM, Steinar H. Gunderson wrote:
> On Fri, Apr 06, 2012 at 02:49:38PM -0700, Dave Taht wrote:
>> However in your environment you will need the beefed up SFQ that is in 3.3.
>> and BQL. If you are not saturating that 10GigE card, you can turn off TSO/GSO
>> as well.
>
> We're not anywhere near saturating our 10GigE card, and even if we did, we
> could add at least one 10GigE card more.
TSO/GSO isn't so much about saturating the 10 GbE NIC as it is avoiding
saturating the CPU(s) driving the 10 GbE NIC. That is, they save trips
down the protocol stack, saving CPU cycles. So, if you are not
saturating one or more of the CPUs in the system, disabling TSO/GSO
should not affect your ability to drive bits out the NIC.
rick jones
next prev parent reply other threads:[~2012-04-14 0:35 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-06 21:37 Steinar H. Gunderson
2012-04-06 21:49 ` Dave Taht
2012-04-06 22:21 ` Steinar H. Gunderson
2012-04-07 15:08 ` Eric Dumazet
2012-04-07 15:25 ` Dave Taht
2012-04-07 15:35 ` Steinar H. Gunderson
2012-04-07 15:48 ` Dave Taht
2012-04-07 15:52 ` Dave Taht
2012-04-07 17:10 ` Jonathan Morton
2012-04-07 17:18 ` Dave Taht
2012-04-07 17:44 ` Jonathan Morton
2012-04-07 18:10 ` Steinar H. Gunderson
2012-04-07 18:27 ` Jonathan Morton
2012-04-07 18:56 ` Dave Taht
2012-04-07 18:50 ` Dave Taht
2012-04-07 18:54 ` Steinar H. Gunderson
2012-04-07 19:01 ` Steinar H. Gunderson
2012-04-07 19:08 ` Jonathan Morton
2012-04-07 19:38 ` Dave Taht
2012-04-07 20:16 ` Steinar H. Gunderson
2012-04-14 0:37 ` Rick Jones
2012-04-07 21:13 ` Jesper Dangaard Brouer
2012-04-07 21:31 ` Steinar H. Gunderson
2012-04-07 19:02 ` Dave Taht
2012-04-07 21:49 ` Fred Baker
2012-04-07 22:36 ` Dave Taht
2012-04-07 23:59 ` Fred Baker
2012-04-07 20:27 ` Neil Davies
2012-04-14 0:35 ` Rick Jones [this message]
2012-04-14 21:06 ` Roger Jørgensen
2012-04-16 17:05 ` Rick Jones
2012-04-07 11:54 ` Neil Davies
2012-04-07 14:17 ` Fred Baker
2012-04-07 15:08 ` Neil Davies
2012-04-07 15:16 ` Steinar H. Gunderson
2012-04-14 0:44 ` Rick Jones
2012-04-07 14:48 ` Dave Taht
2012-05-12 20:08 ` Steinar H. Gunderson
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