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73
readme.md
73
readme.md
|
|
@ -91,39 +91,14 @@ Note: the `v2.x` beta has a new algorithm for managing internal mimalloc pages t
|
|||
* 2021-01-31, `v1.7.0`: stable release 1.7: support explicit user provided memory regions, more precise statistics,
|
||||
improve macOS overriding, initial support for Apple M1, improved DragonFly support, faster memcpy on Windows, various small fixes.
|
||||
|
||||
### Older Releases
|
||||
|
||||
* 2020-09-24, `v1.6.7`: stable release 1.6: using standard C atomics, passing tsan testing, improved
|
||||
handling of failing to commit on Windows, add [`mi_process_info`](https://github.com/microsoft/mimalloc/blob/master/include/mimalloc.h#L156) api call.
|
||||
* 2020-08-06, `v1.6.4`: stable release 1.6: improved error recovery in low-memory situations,
|
||||
support for IllumOS and Haiku, NUMA support for Vista/XP, improved NUMA detection for AMD Ryzen, ubsan support.
|
||||
* 2020-05-05, `v1.6.3`: stable release 1.6: improved behavior in out-of-memory situations, improved malloc zones on macOS,
|
||||
build PIC static libraries by default, add option to abort on out-of-memory, line buffered statistics.
|
||||
* 2020-04-20, `v1.6.2`: stable release 1.6: fix compilation on Android, MingW, Raspberry, and Conda,
|
||||
stability fix for Windows 7, fix multiple mimalloc instances in one executable, fix `strnlen` overload,
|
||||
fix aligned debug padding.
|
||||
* 2020-02-17, `v1.6.1`: stable release 1.6: minor updates (build with clang-cl, fix alignment issue for small objects).
|
||||
* 2020-02-09, `v1.6.0`: stable release 1.6: fixed potential memory leak, improved overriding
|
||||
and thread local support on FreeBSD, NetBSD, DragonFly, and macOSX. New byte-precise
|
||||
heap block overflow detection in debug mode (besides the double-free detection and free-list
|
||||
corruption detection). Add `nodiscard` attribute to most allocation functions.
|
||||
Enable `MIMALLOC_PAGE_RESET` by default. New reclamation strategy for abandoned heap pages
|
||||
for better memory footprint.
|
||||
* 2020-02-09, `v1.5.0`: stable release 1.5: improved free performance, small bug fixes.
|
||||
* 2020-01-22, `v1.4.0`: stable release 1.4: improved performance for delayed OS page reset,
|
||||
more eager concurrent free, addition of STL allocator, fixed potential memory leak.
|
||||
* 2020-01-15, `v1.3.0`: stable release 1.3: bug fixes, improved randomness and [stronger
|
||||
free list encoding](https://github.com/microsoft/mimalloc/blob/783e3377f79ee82af43a0793910a9f2d01ac7863/include/mimalloc-internal.h#L396) in secure mode.
|
||||
* 2019-12-22, `v1.2.2`: stable release 1.2: minor updates.
|
||||
* 2019-11-22, `v1.2.0`: stable release 1.2: bug fixes, improved secure mode (free list corruption checks, double free mitigation). Improved dynamic overriding on Windows.
|
||||
* 2019-10-07, `v1.1.0`: stable release 1.1.
|
||||
* 2019-09-01, `v1.0.8`: pre-release 8: more robust windows dynamic overriding, initial huge page support.
|
||||
* 2019-08-10, `v1.0.6`: pre-release 6: various performance improvements.
|
||||
* [Older release notes](#older-releases)
|
||||
|
||||
Special thanks to:
|
||||
|
||||
* [David Carlier](https://devnexen.blogspot.com/) (@devnexen) for his many contributions, and making
|
||||
mimalloc work better on many less common operating systems, like Haiku, Dragonfly, etc.
|
||||
* Sam Gross ([@colesbury](https://github.com/colesbury)) for the [no GIL](https://github.com/colesbury/nogil) Python fork which
|
||||
uses mimalloc internally.
|
||||
* Mary Feofanova (@mary3000), Evgeniy Moiseenko, and Manuel Pöter (@mpoeter) for making mimalloc TSAN checkable, and finding
|
||||
memory model bugs using the [genMC] model checker.
|
||||
* Weipeng Liu (@pongba), Zhuowei Li, Junhua Wang, and Jakub Szymanski, for their early support of mimalloc and deployment
|
||||
|
|
@ -138,9 +113,12 @@ Special thanks to:
|
|||
|
||||
mimalloc is used in various large scale low-latency services and programs, for example:
|
||||
|
||||
<a href="https://www.bing.com"><img align="left" height="50" src="https://upload.wikimedia.org/wikipedia/commons/e/e9/Bing_logo.svg"></a>
|
||||
<a href="https://azure.microsoft.com/"><img align="left" height="50" src="https://upload.wikimedia.org/wikipedia/commons/a/a8/Microsoft_Azure_Logo.svg"></a>
|
||||
<a href="https://deathstrandingpc.505games.com"><img height="100" src="doc/ds-logo.jpg" style="border-radius=1ex;vertical-align:center"></a>
|
||||
<a href="https://www.bing.com"><img height="50" align="left" src="https://upload.wikimedia.org/wikipedia/commons/e/e9/Bing_logo.svg"></a>
|
||||
<a href="https://azure.microsoft.com/"><img height="50" align="left" src="https://upload.wikimedia.org/wikipedia/commons/a/a8/Microsoft_Azure_Logo.svg"></a>
|
||||
<a href="https://deathstrandingpc.505games.com"><img height="100" align="left" src="doc/ds-logo.jpg"></a>
|
||||
<a href="https://docs.unrealengine.com/4.26/en-US/WhatsNew/Builds/ReleaseNotes/4_25/"><img height="100" align="left" src="doc/unreal-logo.svg"></a>
|
||||
<a href="https://cab.spbu.ru/software/spades/"><img height="100" src="doc/spades-logo.png"></a>
|
||||
|
||||
|
||||
# Building
|
||||
|
||||
|
|
@ -647,6 +625,7 @@ see the differences in the _larsonN_, _mstressN_, and _xmalloc-testN_ benchmarks
|
|||
|
||||
-->
|
||||
|
||||
|
||||
# References
|
||||
|
||||
- \[1] Emery D. Berger, Kathryn S. McKinley, Robert D. Blumofe, and Paul R. Wilson.
|
||||
|
|
@ -684,7 +663,6 @@ see the differences in the _larsonN_, _mstressN_, and _xmalloc-testN_ benchmarks
|
|||
In Proceedings of the 2019 ACM SIGPLAN International Symposium on Memory Management, 122–135. ACM. 2019.
|
||||
-->
|
||||
|
||||
|
||||
# Contributing
|
||||
|
||||
This project welcomes contributions and suggestions. Most contributions require you to agree to a
|
||||
|
|
@ -694,3 +672,34 @@ the rights to use your contribution. For details, visit https://cla.microsoft.co
|
|||
When you submit a pull request, a CLA-bot will automatically determine whether you need to provide
|
||||
a CLA and decorate the PR appropriately (e.g., label, comment). Simply follow the instructions
|
||||
provided by the bot. You will only need to do this once across all repos using our CLA.
|
||||
|
||||
|
||||
# Older Release Notes
|
||||
|
||||
* 2020-09-24, `v1.6.7`: stable release 1.6: using standard C atomics, passing tsan testing, improved
|
||||
handling of failing to commit on Windows, add [`mi_process_info`](https://github.com/microsoft/mimalloc/blob/master/include/mimalloc.h#L156) api call.
|
||||
* 2020-08-06, `v1.6.4`: stable release 1.6: improved error recovery in low-memory situations,
|
||||
support for IllumOS and Haiku, NUMA support for Vista/XP, improved NUMA detection for AMD Ryzen, ubsan support.
|
||||
* 2020-05-05, `v1.6.3`: stable release 1.6: improved behavior in out-of-memory situations, improved malloc zones on macOS,
|
||||
build PIC static libraries by default, add option to abort on out-of-memory, line buffered statistics.
|
||||
* 2020-04-20, `v1.6.2`: stable release 1.6: fix compilation on Android, MingW, Raspberry, and Conda,
|
||||
stability fix for Windows 7, fix multiple mimalloc instances in one executable, fix `strnlen` overload,
|
||||
fix aligned debug padding.
|
||||
* 2020-02-17, `v1.6.1`: stable release 1.6: minor updates (build with clang-cl, fix alignment issue for small objects).
|
||||
* 2020-02-09, `v1.6.0`: stable release 1.6: fixed potential memory leak, improved overriding
|
||||
and thread local support on FreeBSD, NetBSD, DragonFly, and macOSX. New byte-precise
|
||||
heap block overflow detection in debug mode (besides the double-free detection and free-list
|
||||
corruption detection). Add `nodiscard` attribute to most allocation functions.
|
||||
Enable `MIMALLOC_PAGE_RESET` by default. New reclamation strategy for abandoned heap pages
|
||||
for better memory footprint.
|
||||
* 2020-02-09, `v1.5.0`: stable release 1.5: improved free performance, small bug fixes.
|
||||
* 2020-01-22, `v1.4.0`: stable release 1.4: improved performance for delayed OS page reset,
|
||||
more eager concurrent free, addition of STL allocator, fixed potential memory leak.
|
||||
* 2020-01-15, `v1.3.0`: stable release 1.3: bug fixes, improved randomness and [stronger
|
||||
free list encoding](https://github.com/microsoft/mimalloc/blob/783e3377f79ee82af43a0793910a9f2d01ac7863/include/mimalloc-internal.h#L396) in secure mode.
|
||||
* 2019-12-22, `v1.2.2`: stable release 1.2: minor updates.
|
||||
* 2019-11-22, `v1.2.0`: stable release 1.2: bug fixes, improved secure mode (free list corruption checks, double free mitigation). Improved dynamic overriding on Windows.
|
||||
* 2019-10-07, `v1.1.0`: stable release 1.1.
|
||||
* 2019-09-01, `v1.0.8`: pre-release 8: more robust windows dynamic overriding, initial huge page support.
|
||||
* 2019-08-10, `v1.0.6`: pre-release 6: various performance improvements.
|
||||
|
||||
|
|
|
|||
|
|
@ -483,7 +483,7 @@ void mi_free(void* p) mi_attr_noexcept
|
|||
|
||||
mi_threadid_t tid = _mi_thread_id();
|
||||
mi_page_t* const page = _mi_segment_page_of(segment, p);
|
||||
|
||||
|
||||
if (mi_likely(tid == mi_atomic_load_relaxed(&segment->thread_id) && page->flags.full_aligned == 0)) { // the thread id matches and it is not a full page, nor has aligned blocks
|
||||
// local, and not full or aligned
|
||||
mi_block_t* block = (mi_block_t*)(p);
|
||||
|
|
|
|||
|
|
@ -53,7 +53,7 @@ static inline bool mi_page_queue_is_special(const mi_page_queue_t* pq) {
|
|||
// Returns MI_BIN_HUGE if the size is too large.
|
||||
// We use `wsize` for the size in "machine word sizes",
|
||||
// i.e. byte size == `wsize*sizeof(void*)`.
|
||||
extern inline uint8_t _mi_bin(size_t size) {
|
||||
static inline uint8_t mi_bin(size_t size) {
|
||||
size_t wsize = _mi_wsize_from_size(size);
|
||||
uint8_t bin;
|
||||
if (wsize <= 1) {
|
||||
|
|
@ -98,6 +98,10 @@ extern inline uint8_t _mi_bin(size_t size) {
|
|||
Queue of pages with free blocks
|
||||
----------------------------------------------------------- */
|
||||
|
||||
uint8_t _mi_bin(size_t size) {
|
||||
return mi_bin(size);
|
||||
}
|
||||
|
||||
size_t _mi_bin_size(uint8_t bin) {
|
||||
return _mi_heap_empty.pages[bin].block_size;
|
||||
}
|
||||
|
|
@ -105,7 +109,7 @@ size_t _mi_bin_size(uint8_t bin) {
|
|||
// Good size for allocation
|
||||
size_t mi_good_size(size_t size) mi_attr_noexcept {
|
||||
if (size <= MI_MEDIUM_OBJ_SIZE_MAX) {
|
||||
return _mi_bin_size(_mi_bin(size));
|
||||
return _mi_bin_size(mi_bin(size));
|
||||
}
|
||||
else {
|
||||
return _mi_align_up(size,_mi_os_page_size());
|
||||
|
|
@ -134,7 +138,7 @@ static bool mi_heap_contains_queue(const mi_heap_t* heap, const mi_page_queue_t*
|
|||
#endif
|
||||
|
||||
static mi_page_queue_t* mi_page_queue_of(const mi_page_t* page) {
|
||||
uint8_t bin = (mi_page_is_in_full(page) ? MI_BIN_FULL : _mi_bin(page->xblock_size));
|
||||
uint8_t bin = (mi_page_is_in_full(page) ? MI_BIN_FULL : mi_bin(page->xblock_size));
|
||||
mi_heap_t* heap = mi_page_heap(page);
|
||||
mi_assert_internal(heap != NULL && bin <= MI_BIN_FULL);
|
||||
mi_page_queue_t* pq = &heap->pages[bin];
|
||||
|
|
@ -144,7 +148,7 @@ static mi_page_queue_t* mi_page_queue_of(const mi_page_t* page) {
|
|||
}
|
||||
|
||||
static mi_page_queue_t* mi_heap_page_queue_of(mi_heap_t* heap, const mi_page_t* page) {
|
||||
uint8_t bin = (mi_page_is_in_full(page) ? MI_BIN_FULL : _mi_bin(page->xblock_size));
|
||||
uint8_t bin = (mi_page_is_in_full(page) ? MI_BIN_FULL : mi_bin(page->xblock_size));
|
||||
mi_assert_internal(bin <= MI_BIN_FULL);
|
||||
mi_page_queue_t* pq = &heap->pages[bin];
|
||||
mi_assert_internal(mi_page_is_in_full(page) || page->xblock_size == pq->block_size);
|
||||
|
|
@ -177,9 +181,9 @@ static inline void mi_heap_queue_first_update(mi_heap_t* heap, const mi_page_que
|
|||
}
|
||||
else {
|
||||
// find previous size; due to minimal alignment upto 3 previous bins may need to be skipped
|
||||
uint8_t bin = _mi_bin(size);
|
||||
uint8_t bin = mi_bin(size);
|
||||
const mi_page_queue_t* prev = pq - 1;
|
||||
while( bin == _mi_bin(prev->block_size) && prev > &heap->pages[0]) {
|
||||
while( bin == mi_bin(prev->block_size) && prev > &heap->pages[0]) {
|
||||
prev--;
|
||||
}
|
||||
start = 1 + _mi_wsize_from_size(prev->block_size);
|
||||
|
|
|
|||
|
|
@ -786,7 +786,7 @@ void mi_register_deferred_free(mi_deferred_free_fun* fn, void* arg) mi_attr_noex
|
|||
// that frees the block can free the whole page and segment directly.
|
||||
static mi_page_t* mi_large_huge_page_alloc(mi_heap_t* heap, size_t size) {
|
||||
size_t block_size = _mi_os_good_alloc_size(size);
|
||||
mi_assert_internal(_mi_bin(block_size) == MI_BIN_HUGE);
|
||||
mi_assert_internal(mi_bin(block_size) == MI_BIN_HUGE);
|
||||
bool is_huge = (block_size > MI_LARGE_OBJ_SIZE_MAX);
|
||||
mi_page_queue_t* pq = (is_huge ? NULL : mi_page_queue(heap, block_size));
|
||||
mi_page_t* page = mi_page_fresh_alloc(heap, pq, block_size);
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue