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Date:      Wed, 27 Feb 2002 08:44:01 -0800
From:      Kirk McKusick <mckusick@mckusick.com>
To:        Jeff Roberson <jroberson@chesapeake.net>
Cc:        arch@FreeBSD.ORG
Subject:   Re: Slab allocator 
Message-ID:  <200202271644.g1RGi1i32186@beastie.mckusick.com>
In-Reply-To: Your message of "Wed, 27 Feb 2002 04:00:43 EST." <20020227040002.L17591-100000@mail.chesapeake.net> 

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Your slab allocator work looks very interesting. Given that
the performance is comparable to what we are currently running,
it seems like a big step forward.

The current statistics that I find most useful are (in order), the
number of current allocations, the high watermark for allocations, 
and the total number of allocations made. The number of current
allocations needs to be correct and should be done under a lock.
The high watermark and total number of allocations need not be
precisely correct, so could well be done without a lock. The
occational missed count, or a slightly low high watermark would
not much matter.

	Kirk McKusick

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