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cleanup madv_resuable

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unknown 2020-12-10 11:51:58 -08:00
parent cbc14a9287
commit f37a3db37c
2 changed files with 13 additions and 14 deletions
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4
src/options.c
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@ -19,7 +19,7 @@ terms of the MIT license. A copy of the license can be found in the file
#endif #endif
static uintptr_t mi_max_error_count = 64; // stop outputting errors after this static uintptr_t mi_max_error_count = 16; // stop outputting errors after this
static uintptr_t mi_max_warning_count = 16; // stop outputting warnings after this static uintptr_t mi_max_warning_count = 16; // stop outputting warnings after this
static void mi_add_stderr_output(); static void mi_add_stderr_output();
@ -90,7 +90,7 @@ static mi_option_desc_t options[_mi_option_last] =
{ 0, UNINIT, MI_OPTION(use_numa_nodes) }, // 0 = use available numa nodes, otherwise use at most N nodes. { 0, UNINIT, MI_OPTION(use_numa_nodes) }, // 0 = use available numa nodes, otherwise use at most N nodes.
{ 0, UNINIT, MI_OPTION(limit_os_alloc) }, // 1 = do not use OS memory for allocation (but only reserved arenas) { 0, UNINIT, MI_OPTION(limit_os_alloc) }, // 1 = do not use OS memory for allocation (but only reserved arenas)
{ 100, UNINIT, MI_OPTION(os_tag) }, // only apple specific for now but might serve more or less related purpose { 100, UNINIT, MI_OPTION(os_tag) }, // only apple specific for now but might serve more or less related purpose
{ 64, UNINIT, MI_OPTION(max_errors) }, // maximum errors that are output { 16, UNINIT, MI_OPTION(max_errors) }, // maximum errors that are output
{ 16, UNINIT, MI_OPTION(max_warnings) } // maximum warnings that are output { 16, UNINIT, MI_OPTION(max_warnings) } // maximum warnings that are output
}; };

19
src/os.c
View file

@ -722,7 +722,7 @@ static bool mi_os_commitx(void* addr, size_t size, bool commit, bool conservativ
err = mprotect(start, csize, (PROT_READ | PROT_WRITE)); err = mprotect(start, csize, (PROT_READ | PROT_WRITE));
if (err != 0) { err = errno; } if (err != 0) { err = errno; }
#if defined(MADV_FREE_REUSE) #if defined(MADV_FREE_REUSE)
while ((err = madvise(start, csize, MADV_FREE_REUSE)) != 0 && errno == EAGAIN) {} while ((err = madvise(start, csize, MADV_FREE_REUSE)) != 0 && errno == EAGAIN) { errno = 0; }
#endif #endif
} }
#else #else
@ -786,17 +786,16 @@ static bool mi_os_resetx(void* addr, size_t size, bool reset, mi_stats_t* stats)
#else #else
#if defined(MADV_FREE) #if defined(MADV_FREE)
#if defined(MADV_FREE_REUSABLE) #if defined(MADV_FREE_REUSABLE)
static _Atomic(uintptr_t) advice = ATOMIC_VAR_INIT(MADV_FREE_REUSABLE); #define KK_MADV_FREE_INITIAL MADV_FREE_REUSABLE
#else
#define KK_MADV_FREE_INITIAL MADV_FREE
#endif
static _Atomic(uintptr_t) advice = ATOMIC_VAR_INIT(KK_MADV_FREE_INITIAL);
int oadvice = (int)mi_atomic_load_relaxed(&advice); int oadvice = (int)mi_atomic_load_relaxed(&advice);
int err; int err;
while ((err = madvise(start, csize, oadvice)) != 0 && errno == EAGAIN) {} while ((err = madvise(start, csize, oadvice)) != 0 && errno == EAGAIN) { errno = 0; };
if (err != 0 && errno == EINVAL && advice == MADV_FREE_REUSABLE) { if (err != 0 && errno == EINVAL && oadvice == KK_MADV_FREE_INITIAL) {
#else // if MADV_FREE/MADV_FREE_REUSABLE is not supported, fall back to MADV_DONTNEED from now on
static _Atomic(uintptr_t) advice = ATOMIC_VAR_INIT(MADV_FREE);
int err = madvise(start, csize, (int)mi_atomic_load_relaxed(&advice));
if (err != 0 && errno == EINVAL && advice == MADV_FREE) {
#endif
// if MADV_FREE is not supported, fall back to MADV_DONTNEED from now on
mi_atomic_store_release(&advice, (uintptr_t)MADV_DONTNEED); mi_atomic_store_release(&advice, (uintptr_t)MADV_DONTNEED);
err = madvise(start, csize, MADV_DONTNEED); err = madvise(start, csize, MADV_DONTNEED);
} }