FreeBSD source tree https://cgit-dev.freebsd.org/src-test/atom?h=stable%2F7 2009-06-10T12:54:36Z 2009-06-10T12:54:36Z Dag-Erling Smørgrav des@FreeBSD.org 2009-06-10T12:54:36Z urn:sha1:d9644cef2d6fd88e84fff860e7f04c4ce8f68ade 2009-06-10T12:51:58Z Dag-Erling Smørgrav des@FreeBSD.org 2009-06-10T12:51:58Z urn:sha1:6e0f95e01f5dd808dac254c884b6c34bef6cf5d0 2008-03-07T22:39:39Z Jason Evans jasone@FreeBSD.org 2008-03-07T22:39:39Z urn:sha1:d25eaea3901102b810ad0b75e3f464935b2b95ca * 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. 2007-10-09T13:42:34Z David E. O'Brien obrien@FreeBSD.org 2007-10-09T13:42:34Z urn:sha1:65c045e96459361250134c2264b8d72c34266641 This introduces the WITHOUT_LIBKSE nob, and changes WITHOUT_LIBPTHREADS to mean with neither threading libs. Approved by: re(kensmith)