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List:       krbdev
Subject:    Re: KDC performance test - lookaside cache impact, testing framework
From:       Greg Hudson <ghudson () MIT ! EDU>
Date:       2012-05-24 6:11:56
Message-ID: 4FBDD12C.3080307 () mit ! edu
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On 05/17/2012 07:59 AM, Petr Spacek wrote:
> Another question: Are there any public patches with proposals for better 
> lookaside cache? I'm curious ... :-)

If you're still curious, I just put together this:

    https://github.com/greghudson/krb5/tree/lookaside

which uses a constant-size hash table defaulting to 16384 buckets; this
can be modified with the LOOKASIDE_HASH_SIZE preprocessor variable.  The
code would probably need a bit more work before going into the master
(mostly, the overly-clever linked list implementations need to be better
commented).

We could also consider making the hash table configurably or dynamically
sized, but I don't want to go overboard.
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