cb657e3170
Make sure that emmintrin.h can be #include'd without causing a compilation error, rather than blindly defining HAVE_SSE2 based on architecture. Attempts to force SSE2 compilation on a 32-bit Ubuntu 13.10 system running as a VMware guest resulted in a no-win choice without any obvious explanation besides toolchain misconfiguration/bug: - Suffer compilation failure due to __MMX__, __SSE__, and __SSE2__ not being defined, even if -mmmx, -msse, and -msse2 are manually specified (note that they appear to be enabled by default). - Manually define __MMX__, __SSE__, and __SSE2__, and suffer compiler warnings that they are already automatically defined. This results in successful compilation and execution, but the noise is intolerable.
jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. jemalloc first came into use as the FreeBSD libc allocator in 2005, and since then it has found its way into numerous applications that rely on its predictable behavior. In 2010 jemalloc development efforts broadened to include developer support features such as heap profiling, Valgrind integration, and extensive monitoring/tuning hooks. Modern jemalloc releases continue to be integrated back into FreeBSD, and therefore versatility remains critical. Ongoing development efforts trend toward making jemalloc among the best allocators for a broad range of demanding applications, and eliminating/mitigating weaknesses that have practical repercussions for real world applications. The COPYING file contains copyright and licensing information. The INSTALL file contains information on how to configure, build, and install jemalloc. The ChangeLog file contains a brief summary of changes for each release. URL: http://www.canonware.com/jemalloc/