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Date:      Fri, 20 Sep 2002 01:28:28 -0700
From:      Bill Huey (Hui) <billh@gnuppy.monkey.org>
To:        Daniel Eischen <eischen@pcnet1.pcnet.com>
Cc:        freebsd-arch@FreeBSD.ORG, "Bill Huey (Hui)" <billh@gnuppy.monkey.org>
Subject:   Re: New Linux threading model
Message-ID:  <20020920082828.GA4207@gnuppy.monkey.org>
In-Reply-To: <Pine.GSO.4.10.10209200002280.2162-100000@pcnet1.pcnet.com>
References:  <20020920031423.GA3380@gnuppy.monkey.org> <Pine.GSO.4.10.10209200002280.2162-100000@pcnet1.pcnet.com>

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On Fri, Sep 20, 2002 at 12:07:15AM -0400, Daniel Eischen wrote:
> I read some of this and some of it is exactly opposite of why
> scheduler activations was made in the first place.  They are
> pushing all scheduling decisions and locking in to the kernel.
> One of the points of scheduler activations is that the library
> can make all scheduling decisions without need for having
> the kernel involved.

I wasn't quite sure how to break this to them without being
completely impolite. They did some measurements, but I'm curious
how something like thread performance (context switching, blocking)
in libc_r measures against their 1:1 model. It should be simple
to write a test program to check it out and see what kind of
result they get.

bill


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