Date: Fri, 9 Jun 2006 09:18:05 +0930 From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> To: freebsd-current@freebsd.org Subject: Re: libmemstat(3) - Library for monitoring kernel memory use Message-ID: <20060608234805.GM40068@squash.dsto.defence.gov.au> In-Reply-To: <20060606090919.U68996@fledge.watson.org> References: <C1BBF34889A04C4C8ACEE5C7CC753FDFCCA68E@PNE-HJN-MBX01.wipro.com> <20060606071736.J68996@fledge.watson.org> <20060606073436.GK27880@squash.dsto.defence.gov.au> <20060606090919.U68996@fledge.watson.org>
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0n Tue, Jun 06, 2006 at 09:11:10AM +0100, Robert Watson wrote:
>
>On Tue, 6 Jun 2006, Wilkinson, Alex wrote:
>
>> 0n Tue, Jun 06, 2006 at 07:20:39AM +0100, Robert Watson wrote:
>>
>> >
>> >On Tue, 6 Jun 2006 bhuvan.kumarmital@wipro.com wrote:
>> >
>> >> Saw your tool (memtop) for monitoring kernel memory. I'd like to
>> use a
>> >>similar tool for linux, i believe your tool is bsd based. Could you
>> tell
>> >>me a similar tool, or perhaps another version of memtop built for
>> linux.
>> >>I'd really appreciate you help. Please reply on my email address.
>> >
>> >You are correct that libmemstat and derived tools currently rely on
>> >features present in the FreeBSD kernel. The library provides a general
>> >monitoring abstraction over a set of specific kernel memory allocators
>> --
>> >specifically, the FreeBSD malloc(9) and uma(9) allocators. It is
>> >relatively straight forward to implement that abstraction for other
>> memory
>> >allocators, such as user space allocators or kernel allocators from
>> other
>> >platforms, but that work has not been done (as far as I know). I'm not
>> >aware of specific monitoring tools for the Linux operating system that
>> are
>> >able to perform this type of profiling/monitoring, although I presume
>> some
>> >sort of kernel memory profiling tool does exist.
>>
>>Erm, Robert, where does memtop live ? I can find it in ports nor base
>>system.
>
>memtop is an experimental monitoring tool based on libmemstat, you can find
>the source here:
>
> http://www.watson.org/~robert/freebsd/libmemstat/
>
>Possibly something like this could be integrated into systat, but my
>ncurses knowledge is a bit weak, and I've not had a chance to investigate
>further. As with vmstat, the interpretation of the output requires a
>moderate amount of insight into how the kernel works, so I've been a bit
>reluctant to push it as a debugging tool without some more refinement. I
>think it would be neat if someone picked it up and did something useful
>with it, though :-).
I assume this only works with -CURRENT ?
-aW
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