Date: Tue, 30 Oct 2012 11:21:16 -0000 From: "Steven Hartland" <killing@multiplay.co.uk> To: "Karl Pielorz" <kpielorz_lst@tdx.co.uk>, <freebsd-hackers@freebsd.org> Subject: Re: Threaded 6.4 code compiled under 9.0 uses a lot more memory?.. Message-ID: <D0F3F622E1404DBDA66906851FEA7F63@multiplay.co.uk> References: <A92CE63E6E6DB93B366F4A42@MightyAtom.tdx.co.uk>
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----- Original Message -----
From: "Karl Pielorz" <kpielorz_lst@tdx.co.uk>
To: <freebsd-hackers@freebsd.org>
Sent: Tuesday, October 30, 2012 11:12 AM
Subject: Threaded 6.4 code compiled under 9.0 uses a lot more memory?..
>
> Hi All,
>
> Can anyone think of any quick pointers as to why some code originally
> written under 6.4 amd64 - when re-compiled under 9.0-stable amd64 takes up
> a *lot* more memory when running?
>
> The code involved is a sendmail Milter, and a TCP server type program (that
> runs up a large number of threads [~700] at startup).
>
> Both were previously compiled with:
>
> -O2 -pthread -lc_r
>
> They're now compiled under 9.0-S with just:
>
> -O2 -pthread
>
>
> As an example, under 6.4 the size/res for one reported by top is 81Mb/48Mb
> - and for the other is 44Mb/9Mb [this is after it's been running for weeks].
>
> Under 9.0-stable the initial memory used by the processes just after
> starting rises to 625Mb/128Mb and 519Mb/65Mb respectively.
>
> Is that something I need to worry about?
>
> They've not been running longing enough yet to see if anything is 'leaking'
> (i.e. if size/res continues to go up). Just thought I'd ask if there's a
> simple/possible explanation for this - and if it's something I need to
> worry about...
amd64 vs i386?
Regards
Steve
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