Date: Sun, 23 Sep 2007 03:08:27 +0100 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Jack Vogel" <jfvogel@gmail.com>, "Artem Kuchin" <matrix@itlegion.ru> Cc: freebsd-current@freebsd.org Subject: Re: TSP on em makes send of streams very slow Message-ID: <027501c7fd86$a13f8c90$b6db87d4@multiplay.co.uk> References: <01c801c7fc7a$696ab900$0c00a8c0@Artem><2a41acea0709211359w37ba779dsec94de504a9f4a9c@mail.gmail.com><019101c7fd3d$cd15f870$0c00a8c0@Artem> <2a41acea0709221647o3cdcb72pf6194c54782c61fb@mail.gmail.com>
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----- Original Message -----
From: "Jack Vogel" <jfvogel@gmail.com>
> 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 think the issue here is that when we install a machine we expect it to
just work TM, we dont go looking at all the possible options for something
that "may" cause an issue.
Yes he spotted there was a problem, investigated and found a solution
but I'd guess this took a fair amount of time and hence is not something
we ant others to have to go through.
> 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.
Much as this sounds like an option if TSP doesnt provide any real gains
at 100Mb, the main question is why should enabling this option have such
a massive detrimental effect on performance?
Surely this is work investigating and fixing? The issue could be
manifesting itself in other ways on 1Gb and 10Gb could it not? So a
fix could provide additional benefits.
The key issue I suppose is to understand why there should be such a
drop in performance, hardware, driver or OS issue?
Regards
Steve
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