From: Jonathan Larmour <jlarmour@redhat.com>
To: Suet Fei Li <suetfei@bwrc.eecs.berkeley.edu>
Cc: "'ecos-discuss@sourceware.cygnus.com'"
<ecos-discuss@sourceware.cygnus.com>
Subject: Re: [ECOS] data mem size estimation
Date: Wed, 31 Jan 2001 23:20:00 -0000 [thread overview]
Message-ID: <3A790E30.42D6A508@redhat.com> (raw)
In-Reply-To: <711F6B80B5B4D211BA900090272AB7649DB52C@noyce.eecs.berkeley.edu>
Suet Fei Li wrote:
>
> Hi everyone, is there a good way to estimate the data memory requirement for
> the OS? I need to know how much memory we need. Also any hints on how to
> estimate data memory requirement in general (application +OS) ? I have no
> experience in this at all.
If you aren't using dynamic memory allocation at all, the answer is easy:
arm-elf-size <executable>
Of course you may still want to reduce your statically defined stack sizes.
You can use the recently added stack usage measurement functions to
influence your choice - cyg_thread_measure_stack_usage() in the kernel C
API, or pthread_measure_stack_usage() in pthreads. The obvious caveats
apply that the measurements returned are not necessarily the worst case for
the code in question - that's a judgement call up to you.
Jifl
--
Red Hat, Rustat House, Clifton Road, Cambridge, UK. Tel: +44 (1223) 271062
Maybe this world is another planet's Hell -Aldous Huxley || Opinions==mine
prev parent reply other threads:[~2001-01-31 23:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-31 22:27 Suet Fei Li
2001-01-31 23:20 ` Jonathan Larmour [this message]
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