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When evaluating changes in HPA logic, it is useful to know internal `hpa_shard` state. Great deal of this state is `psset`. Some of the `psset` stats was available, but in disaggregated form, which is not very convenient. This commit exposed `psset` counters to `mallctl` and malloc stats dumps. Example of how malloc stats dump will look like after the change. HPA shard stats: Pageslabs: 14899 (4354 huge, 10545 nonhuge) Active pages: 6708166 (2228917 huge, 4479249 nonhuge) Dirty pages: 233816 (331 huge, 233485 nonhuge) Retained pages: 686306 Purge passes: 8730 (10 / sec) Purges: 127501 (146 / sec) Hugeifies: 4358 (5 / sec) Dehugifies: 4 (0 / sec) Pageslabs, active pages, dirty pages and retained pages are rows added by this change.
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 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: https://jemalloc.net/