From: Steve Grubb <sgrubb@redhat.com>
To: linux-audit@redhat.com
Subject: Re: cross-compiling difficulty with on-the-fly gen/build/use paradigm
Date: Sat, 18 Aug 2012 09:10:41 -0400 [thread overview]
Message-ID: <16409035.K1xsEVS8pz@x2> (raw)
In-Reply-To: <loom.20120817T220540-441@post.gmane.org>
On Friday, August 17, 2012 08:19:48 PM John Baron wrote:
> I'm having a problem trying to cross-compile audit. The problem is that
> gen_actiontabs_h is built using the cross-compiler (for ARM), and then it's
> asked to run on the host (x86_64). [I've seen some discussion of cross-
> compiling, but this issue hasn't been brought up, AFAICT]
>
> Is there a simple way around this? A complex way, perhaps? Extra points
> for simple!
Unfortunately no. This code has been there for quite a while. The issue is
basically that we were doing performance analysis of ausearch/report and
libauparse. We found that the integer to string lookups were causing a
performance hit. Mirek wrote some code to turn these from a serial search into
a sorted list that I think are now searched using a b-tree algorithm. So, at
compile time what happens is these tables are sorted so that later they are
fast. This improved performance quite a bit.
-Steve
next prev parent reply other threads:[~2012-08-18 13:10 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-17 20:19 cross-compiling difficulty with on-the-fly gen/build/use paradigm John Baron
2012-08-18 13:10 ` Steve Grubb [this message]
2012-08-20 16:47 ` Miloslav Trmac
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