From owner-cvs-src@FreeBSD.ORG Fri Mar 7 22:39:40 2008 Return-Path: Delivered-To: cvs-src@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 192961065673; Fri, 7 Mar 2008 22:39:40 +0000 (UTC) (envelope-from jasone@FreeBSD.org) Received: from repoman.freebsd.org (repoman.freebsd.org [IPv6:2001:4f8:fff6::29]) by mx1.freebsd.org (Postfix) with ESMTP id 0657A8FC2F; Fri, 7 Mar 2008 22:39:40 +0000 (UTC) (envelope-from jasone@FreeBSD.org) Received: from repoman.freebsd.org (localhost [127.0.0.1]) by repoman.freebsd.org (8.14.1/8.14.1) with ESMTP id m27Mdd4M003086; Fri, 7 Mar 2008 22:39:39 GMT (envelope-from jasone@repoman.freebsd.org) Received: (from jasone@localhost) by repoman.freebsd.org (8.14.1/8.14.1/Submit) id m27MddwJ003085; Fri, 7 Mar 2008 22:39:39 GMT (envelope-from jasone) Message-Id: <200803072239.m27MddwJ003085@repoman.freebsd.org> From: Jason Evans Date: Fri, 7 Mar 2008 22:39:39 +0000 (UTC) To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org X-FreeBSD-CVS-Branch: RELENG_7 Cc: Subject: cvs commit: src/lib/libc/gen Symbol.map src/lib/libc/stdlib malloc.3 malloc.c src/lib/libkse kse.map src/lib/libkse/sys lock.c lock.h src/lib/libkse/thread thr_cond.c thr_init.c thr_kern.c thr_mutex.c thr_rtld.c src/lib/libthr pthread.map ... X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 07 Mar 2008 22:39:40 -0000 jasone 2008-03-07 22:39:39 UTC FreeBSD src repository Modified files: (Branch: RELENG_7) lib/libc/gen Symbol.map lib/libc/stdlib malloc.3 malloc.c lib/libkse kse.map lib/libkse/sys lock.c lock.h lib/libkse/thread thr_cond.c thr_init.c thr_kern.c thr_mutex.c thr_rtld.c lib/libthr pthread.map lib/libthr/thread thr_mutex.c Log: MFC: Merge malloc(3) improvements and fixes. The highlights are: * Avoid re-zeroing memory in calloc() when possible. * Use pthread mutexes where possible instead of libc "spinlocks", and actually spin some during contention before blocking. * Implement dynamic load balancing of thread-->arena mapping. * Avoid floating point math in order to avoid increased context switch overhead for applications that otherwise would not use floating point math. * Restructure how sbrk() and mmap() are used to acquire memory mappings. This provides a way to force malloc to only use sbrk(), which can be useful in the context of resource limits. * Reduce the number of mmap() calls typically necessary when allocating a chunk. * Track dirty unused pages so that they can be purged if they exceed a threshold. * Try to realloc() large objects in place. * Manage page runs with trees instead of chunk maps, which allows logarithmic-time run allocation. Revision Changes Path 1.6.2.1 +1 -0 src/lib/libc/gen/Symbol.map 1.73.2.1 +95 -36 src/lib/libc/stdlib/malloc.3 1.147.2.2 +2283 -1341 src/lib/libc/stdlib/malloc.c 1.1.2.1 +1 -0 src/lib/libkse/kse.map 1.11.2.2 +4 -3 src/lib/libkse/sys/lock.c 1.8.2.1 +1 -1 src/lib/libkse/sys/lock.h 1.57.2.1 +1 -1 src/lib/libkse/thread/thr_cond.c 1.76.2.1 +4 -4 src/lib/libkse/thread/thr_init.c 1.125.2.2 +5 -5 src/lib/libkse/thread/thr_kern.c 1.53.2.2 +30 -7 src/lib/libkse/thread/thr_mutex.c 1.7.2.1 +1 -1 src/lib/libkse/thread/thr_rtld.c 1.18.2.1 +1 -0 src/lib/libthr/pthread.map 1.54.2.3 +23 -6 src/lib/libthr/thread/thr_mutex.c