From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Dmitry Antipov <dmantipov@yandex.ru>
Cc: Eli Zaretskii <eliz@gnu.org>, Paul Eggert <eggert@cs.ucla.edu>,
Emacs development discussions <emacs-devel@gnu.org>
Subject: Re: Aligned blocks management: obsolete?
Date: Wed, 20 Jun 2012 11:41:57 -0400 [thread overview]
Message-ID: <jwvhau6vvq9.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <4FE1D61E.8010204@yandex.ru> (Dmitry Antipov's message of "Wed, 20 Jun 2012 17:54:38 +0400")
>> I'm not completely sure the test is sufficiently thorough to catch all
>> problems, and more importantly it doesn't test the efficiency
>> of memalign.
> If it's just a matter of configure test, different methods may be used.
> For example, attached code checks whether memalign tends to create holes
> while allocating (1024 - 8) blocks aligned at 1024-bytes boundary;
You want to mix those allocations with a few others of different sizes,
since some of the problems show up in those cases (e.g.
"memalign(1024); malloc(10); memalign(1024)" might end up wasting 1KB
between the malloc and the second memalign).
> optimal pad (BLOCK_PADDING in current code) may be detected with the
> similar way.
That would be good.
Stefan
next prev parent reply other threads:[~2012-06-20 15:41 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-12 8:11 Aligned blocks management: obsolete? Dmitry Antipov
2011-12-12 13:13 ` Eli Zaretskii
2011-12-12 14:07 ` Dmitry Antipov
2011-12-12 18:11 ` Eli Zaretskii
2011-12-12 18:27 ` Paul Eggert
2012-06-19 16:51 ` Dmitry Antipov
2012-06-19 17:13 ` Eli Zaretskii
2012-06-19 21:34 ` Stefan Monnier
2012-06-20 6:47 ` Dmitry Antipov
2012-06-20 12:48 ` Stefan Monnier
2012-06-20 13:54 ` Dmitry Antipov
2012-06-20 15:41 ` Stefan Monnier [this message]
2012-06-20 17:10 ` Eli Zaretskii
2012-06-21 4:27 ` Dmitry Antipov
2012-06-21 16:29 ` Eli Zaretskii
2012-07-04 8:39 ` Old topic(s) again [was: Re: Aligned blocks management: obsolete?] Dmitry Antipov
2012-07-04 13:11 ` Stefan Monnier
2012-06-21 21:34 ` Aligned blocks management: obsolete? Richard Stallman
2012-06-20 17:06 ` Eli Zaretskii
2012-06-21 3:30 ` Dmitry Antipov
2012-06-21 16:23 ` Eli Zaretskii
2012-06-20 17:59 ` Wolfgang Jenkner
2012-06-21 3:12 ` Dmitry Antipov
2012-06-20 6:53 ` Paul Eggert
2011-12-12 18:38 ` Stefan Monnier
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