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[Bug libc/11261] malloc uses excessive memory for multi-threaded applications
- From: "rich at testardi dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: 9 Feb 2010 16:01:59 -0000
- Subject: [Bug libc/11261] malloc uses excessive memory for multi-threaded applications
- References: <20100208202339.11261.rich@testardi.com>
- Reply-to: sourceware-bugzilla at sourceware dot org
------- Additional Comments From rich at testardi dot com 2010-02-09 16:01 -------
Actually, I totally understand the difference and that is why I mentioned the
fragmentation of memory... When each arena has just a few straggling
allocations, the maximum *committed* RAM required for the program's *working
set* using the thread-preferred arena model is, in fact, N times that required
for a traditional model, where N is the number of threads. This shows up in
real-world thrashing that could actually be avoided. Basically, if the
program is doing small allocations, a small percentage of stragglers can pin
the entire allocated space -- and the allocated space is, in fact, much larger
than it needs to be (and larger than it is in other OS's). But thank you for
your time -- we all want the same thing here, a ever better Linux that is more
suited to heavily threaded applications. :-)
--
http://sourceware.org/bugzilla/show_bug.cgi?id=11261
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