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* Turn on -Werror for travis CI buildsDavid Goldblatt2017-04-112-29/+31
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* Port CPU_SPINWAIT to __powerpc64__Rafael Folco2017-04-101-1/+2
| | | | | | | | | Hyper-threaded CPUs may need a special instruction inside spin loops in order to yield to another virtual CPU. The 'pause' instruction that is available for x86 is not supported on Power. Apparently the extended mnemonics like yield, mdoio, and mdoom are not actually implemented on POWER8, although mentioned in the ISA 2.07 document. The recommended magic bits are an 'or 31,31,31'.
* Move reentrancy_level to the beginning of TSD.Qi Wang2017-04-073-9/+9
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* Add basic reentrancy-checking support, and allow arena_new to reenter.David Goldblatt2017-04-0710-45/+168
| | | | | | | | | This checks whether or not we're reentrant using thread-local data, and, if we are, moves certain internal allocations to use arena 0 (which should be properly initialized after bootstrapping). The immediate thing this allows is spinning up threads in arena_new, which will enable spinning up background threads there.
* Add hooking functionalityDavid Goldblatt2017-04-0719-11/+183
| | | | | This allows us to hook chosen functions and do interesting things there (in particular: reentrancy checking).
* Optimizing TSD and thread cache layout.Qi Wang2017-04-0710-99/+185
| | | | | | | | | | 1) Re-organize TSD so that frequently accessed fields are closer to the beginning and more compact. Assuming 64-bit, the first 2.5 cachelines now contains everything needed on tcache fast path, expect the tcache struct itself. 2) Re-organize tcache and tbins. Take lg_fill_div out of tbin, and reduce tbin to 24 bytes (down from 32). Split tbins into tbins_small and tbins_large, and place tbins_small close to the beginning.
* Bypass witness_fork in TSD when !config_debug.Qi Wang2017-04-071-0/+9
| | | | | With the tcache change, we plan to leave some blank space when !config_debug (unused tbins, witnesses) at the end of the tsd. Let's not touch the memory.
* Get rid of tcache_enabled_t as we have runtime init support.Qi Wang2017-04-076-24/+14
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* Integrate auto tcache into TSD.Qi Wang2017-04-0716-172/+294
| | | | | | | | | The embedded tcache is initialized upon tsd initialization. The avail arrays for the tbins will be allocated / deallocated accordingly during init / cleanup. With this change, the pointer to the auto tcache will always be available, as long as we have access to the TSD. tcache_available() (called in tcache_get()) is provided to check if we should use tcache.
* Remove the pre-C11-atomics API, which is now unusedDavid Goldblatt2017-04-052-90/+0
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* Make prof's cum_gctx a C11-style atomicDavid Goldblatt2017-04-051-2/+2
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* Make the mutex n_waiting_thds field a C11-style atomicDavid Goldblatt2017-04-054-7/+19
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* Convert extent module to use C11-style atomcisDavid Goldblatt2017-04-051-8/+10
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* Convert accumbytes in prof_accum_t to C11 atomics, when possibleDavid Goldblatt2017-04-053-6/+12
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* Make extent_dss use C11-style atomicsDavid Goldblatt2017-04-051-15/+21
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* Make base_t's extent_hooks field C11-atomicDavid Goldblatt2017-04-052-15/+9
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* Transition arena struct fields to C11 atomicsDavid Goldblatt2017-04-053-39/+48
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* Move arena-tracking atomics in jemalloc.c to C11-styleDavid Goldblatt2017-04-053-11/+12
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* Transition e_prof_tctx in struct extent to C11 atomicsDavid Goldblatt2017-04-042-8/+8
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* Convert prng module to use C11-style atomicsDavid Goldblatt2017-04-044-43/+46
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* Make the tsd member init functions to take tsd_t * type.Qi Wang2017-04-043-3/+9
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* Do proper cleanup for tsd_state_reincarnated.Qi Wang2017-04-044-18/+50
| | | | | Also enable arena_bind under non-nominal state, as the cleanup will be handled correctly now.
* Remove the leafkey NULL check in leaf_elm_lookup.Qi Wang2017-04-042-14/+10
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* Add init function support to tsd members.Qi Wang2017-04-049-33/+74
| | | | | | This will facilitate embedding tcache into tsd, which will require proper initialization cannot be done via the static initializer. Make tsd->rtree_ctx to be initialized via rtree_ctx_data_init().
* issue-586: detect main executable even if PIE is activeAliaksey Kandratsenka2017-04-041-1/+12
| | | | | | | | | | Previous logic of detecting main program addresses is to assume that main executable is at least addressess. With PIE (active by default on Ubuntus) it doesn't work. In order to deal with that, we're attempting to find main executable mapping in /proc/[pid]/maps. And old logic is preserved too just in case.
* Lookup extent once per time during tcache_flush_small / _large.Qi Wang2017-03-281-14/+28
| | | | Caching the extents on stack to avoid redundant looking up overhead.
* Move arena_slab_data_t's nfree into extent_t's e_bits.Jason Evans2017-03-286-43/+86
| | | | | | | | | | | | | | Compact extent_t to 128 bytes on 64-bit systems by moving arena_slab_data_t's nfree into extent_t's e_bits. Cacheline-align extent_t structures so that they always cross the minimum number of cacheline boundaries. Re-order extent_t fields such that all fields except the slab bitmap (and overlaid heap profiling context pointer) are in the first cacheline. This resolves #461.
* Simplify rtree cache replacement policy.Qi Wang2017-03-271-14/+11
| | | | | To avoid memmove on free() fast path, simplify the cache replacement policy to only bubble up the cache hit element by 1.
* Simplify rtree_clear() to avoid locking.Jason Evans2017-03-271-4/+4
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* Fix a race in rtree_szind_slab_update() for RTREE_LEAF_COMPACT.Jason Evans2017-03-272-13/+53
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* Remove BITMAP_USE_TREE.Jason Evans2017-03-275-307/+0
| | | | | | | | | | Remove tree-structured bitmap support, in order to reduce complexity and ease maintenance. No bitmaps larger than 512 bits have been necessary since before 4.0.0, and there is no current plan that would increase maximum bitmap size. Although tree-structured bitmaps were used on 32-bit platforms prior to this change, the overall benefits were questionable (higher metadata overhead, higher bitmap modification cost, marginally lower search cost).
* Fix bitmap_ffu() to work with 3+ levels.Jason Evans2017-03-272-41/+56
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* Pack various extent_t fields into a bitfield.Jason Evans2017-03-262-104/+155
| | | | This reduces sizeof(extent_t) from 160 to 136 on x64.
* Store arena index rather than (arena_t *) in extent_t.Jason Evans2017-03-263-5/+5
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* Fix BITMAP_USE_TREE version of bitmap_ffu().Jason Evans2017-03-262-5/+48
| | | | | | | | | This fixes an extent searching regression on 32-bit systems, caused by the initial bitmap_ffu() implementation in c8021d01f6efe14dc1bd200021a815638063cb5f (Implement bitmap_ffu(), which finds the first unset bit.), as first used in 5d33233a5e6601902df7cddd8cc8aa0b135c77b2 (Use a bitmap in extents_t to speed up search.).
* Force inline ifree to avoid function call costs on fast path.Qi Wang2017-03-251-2/+2
| | | | | Without ALWAYS_INLINE, sometimes ifree() gets compiled into its own function, which adds overhead on the fast path.
* Use a bitmap in extents_t to speed up search.Jason Evans2017-03-253-12/+44
| | | | | Rather than iteratively checking all sufficiently large heaps during search, maintain and use a bitmap in order to skip empty heaps.
* Implement BITMAP_GROUPS().Jason Evans2017-03-251-0/+6
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* Implement bitmap_ffu(), which finds the first unset bit.Jason Evans2017-03-256-25/+136
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* Use first fit layout policy instead of best fit.Jason Evans2017-03-251-12/+42
| | | | | | | | | For extents which do not delay coalescing, use first fit layout policy rather than first-best fit layout policy. This packs extents toward older virtual memory mappings, but at the cost of higher search overhead in the common case. This resolves #711.
* Added documentation for mutex profiling related mallctls.Qi Wang2017-03-231-0/+206
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* Profile per arena base mutex, instead of just a0.Qi Wang2017-03-233-6/+7
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* Refactor mutex profiling code with x-macros.Qi Wang2017-03-237-232/+225
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* Switch to nstime_t for the time related fields in mutex profiling.Qi Wang2017-03-235-20/+24
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* Added custom mutex spin.Qi Wang2017-03-233-17/+27
| | | | | | | A fixed max spin count is used -- with benchmark results showing it solves almost all problems. As the benchmark used was rather intense, the upper bound could be a little bit high. However it should offer a good tradeoff between spinning and blocking.
* Added extents_dirty / _muzzy mutexes, as well as decay_dirty / _muzzy.Qi Wang2017-03-234-41/+61
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* Added "stats.mutexes.reset" mallctl to reset all mutex stats.Qi Wang2017-03-2312-189/+250
| | | | Also switched from the term "lock" to "mutex".
* Added JSON output for lock stats.Qi Wang2017-03-234-44/+124
| | | | Also added option 'x' to malloc_stats() to bypass lock section.
* Added lock profiling and output for global locks (ctl, prof and base).Qi Wang2017-03-239-78/+174
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* Add arena lock stats output.Qi Wang2017-03-239-51/+269
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