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Date:      Tue, 30 Oct 2012 13:46:14 +0100
From:      Fabian Keil <freebsd-listen@fabiankeil.de>
To:        Karl Pielorz <kpielorz_lst@tdx.co.uk>
Cc:        freebsd-hackers@freebsd.org
Subject:   Re: Threaded 6.4 code compiled under 9.0 uses a lot more memory?..
Message-ID:  <20121030134614.1a42f0e3@fabiankeil.de>
In-Reply-To: <A92CE63E6E6DB93B366F4A42@MightyAtom.tdx.co.uk>
References:  <A92CE63E6E6DB93B366F4A42@MightyAtom.tdx.co.uk>

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Karl Pielorz <kpielorz_lst@tdx.co.uk> wrote:

> Can anyone think of any quick pointers as to why some code originally=20
> written under 6.4 amd64 - when re-compiled under 9.0-stable amd64 takes
> up a *lot* more memory when running?

6.4 comes with phkmalloc while 9.0 uses jemalloc. Maybe you are
allocating memory in a way that is less space-efficiently handled by
jemalloc's default configuration.

Fabian

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