This is the mail archive of the
cygwin-apps
mailing list for the Cygwin project.
64 bit Cygwin 1.7.18-18
- From: Corinna Vinschen <corinna-cygwin at cygwin dot com>
- To: cygwin-apps at cygwin dot com
- Date: Wed, 10 Apr 2013 14:54:26 +0200
- Subject: 64 bit Cygwin 1.7.18-18
- Reply-to: cygwin-apps at cygwin dot com
Hi kiddies,
I just uploaded the 64 bit cygwin 1.7.18-18 package. About 4 weeks ago
I ripped out ptmalloc3. The reason was ptmalloc3 always used mmap.
Duplicating many mmaps at fork time is noticably less performant than
duplicating the heap, so I thought ptmalloc3 is not useful for us.
However, I investigated this again today, and it turned out that my
assumption was based on some default settings, which I didn't quite
understood at the time (dlmalloc has lots of intertwined settings).
I now reinstantiated ptmalloc3 in the 64 bit branch again, this time
with a tweak which lets ptmalloc3 prefer heap memory over mmap'ed
memory. It seems to work nicely, at least a complete configure/make
of lynx worked as designed.
Ultimately we might switch to jemalloc(*) at one point, but for the time
being, ptmalloc3 seems to be a nice compromise, given how much faster it
is in a multi-threaded environment.
So, please test. If you see that anything is reproducibly broken, just
by updating from 1.7.18-17 to 1.7.18-18, please report it here.
Thanks,
Corinna
(*) http://www.canonware.com/jemalloc/
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat