Date: Sat, 22 Sep 2007 17:03:14 -0700 From: "Kip Macy" <kip.macy@gmail.com> To: "Jack Vogel" <jfvogel@gmail.com> Cc: Artem Kuchin <matrix@itlegion.ru>, freebsd-current@freebsd.org Subject: Re: TSP on em makes send of streams very slow Message-ID: <b1fa29170709221703k19c3e88t2fd6fed225f613b0@mail.gmail.com> In-Reply-To: <2a41acea0709221647o3cdcb72pf6194c54782c61fb@mail.gmail.com> References: <01c801c7fc7a$696ab900$0c00a8c0@Artem> <2a41acea0709211359w37ba779dsec94de504a9f4a9c@mail.gmail.com> <019101c7fd3d$cd15f870$0c00a8c0@Artem> <2a41acea0709221647o3cdcb72pf6194c54782c61fb@mail.gmail.com>
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On 9/22/07, Jack Vogel <jfvogel@gmail.com> wrote: > On 9/22/07, Artem Kuchin <matrix@itlegion.ru> wrote: > > > TSO is for some environments, it isn't gonna be useful at 100Mb > > > (which you are), it can be useful at 1Gb but not always, when you get > > > to 10G its > > > a HUGE benefit. > > > > > > Just cuz you can shoot yourself in the foot doesn't mean the gun has a > > > problem :) > > > > But wait, i did not shoot myself. I have been shot by the driver w/o any > > preliminary warning. TSO4 was enabled by DEFAULT (i did not enable it), > > so anybody can be in my place if used the same driver on the similar hardware > > (which is plenty). > > > > So, i think this is a problem which really need to be addressed. > > It is on by default because it the majority of cases its a benefit, you > found it to be a problem and turned it off, your problem is solved. > > I admit, at one point I considered disabling it automatically for anything > under Gig speed, but a large community has used this driver with this > feature for over a year, no one has lobbied to have to disabled, so I > have not. > > If there are others who think this would be a good idea, speak up, and > I will do so. I don't think many people will be hooking it up to 100Mbit. However, disabling TSO if media negotiates 100Mbit seems like an easy enough fix. -Kip
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