diff options
Diffstat (limited to 'src/pages.c')
| -rw-r--r-- | src/pages.c | 47 |
1 files changed, 38 insertions, 9 deletions
diff --git a/src/pages.c b/src/pages.c index 647952a..5f0c966 100644 --- a/src/pages.c +++ b/src/pages.c @@ -170,15 +170,16 @@ pages_purge(void *addr, size_t size) #ifdef _WIN32 VirtualAlloc(addr, size, MEM_RESET, PAGE_READWRITE); unzeroed = true; -#elif defined(JEMALLOC_HAVE_MADVISE) -# ifdef JEMALLOC_PURGE_MADVISE_DONTNEED -# define JEMALLOC_MADV_PURGE MADV_DONTNEED -# define JEMALLOC_MADV_ZEROS true -# elif defined(JEMALLOC_PURGE_MADVISE_FREE) +#elif (defined(JEMALLOC_PURGE_MADVISE_FREE) || \ + defined(JEMALLOC_PURGE_MADVISE_DONTNEED)) +# if defined(JEMALLOC_PURGE_MADVISE_FREE) # define JEMALLOC_MADV_PURGE MADV_FREE # define JEMALLOC_MADV_ZEROS false +# elif defined(JEMALLOC_PURGE_MADVISE_DONTNEED) +# define JEMALLOC_MADV_PURGE MADV_DONTNEED +# define JEMALLOC_MADV_ZEROS true # else -# error "No madvise(2) flag defined for purging unused dirty pages." +# error No madvise(2) flag defined for purging unused dirty pages # endif int err = madvise(addr, size, JEMALLOC_MADV_PURGE); unzeroed = (!JEMALLOC_MADV_ZEROS || err != 0); @@ -191,6 +192,34 @@ pages_purge(void *addr, size_t size) return (unzeroed); } +bool +pages_huge(void *addr, size_t size) +{ + + assert(PAGE_ADDR2BASE(addr) == addr); + assert(PAGE_CEILING(size) == size); + +#ifdef JEMALLOC_THP + return (madvise(addr, size, MADV_HUGEPAGE) != 0); +#else + return (false); +#endif +} + +bool +pages_nohuge(void *addr, size_t size) +{ + + assert(PAGE_ADDR2BASE(addr) == addr); + assert(PAGE_CEILING(size) == size); + +#ifdef JEMALLOC_THP + return (madvise(addr, size, MADV_NOHUGEPAGE) != 0); +#else + return (false); +#endif +} + #ifdef JEMALLOC_SYSCTL_VM_OVERCOMMIT static bool os_overcommits_sysctl(void) @@ -219,7 +248,7 @@ os_overcommits_proc(void) char buf[1]; ssize_t nread; -#if defined(JEMALLOC_HAVE_SYSCALL) && defined(SYS_open) +#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_open) fd = (int)syscall(SYS_open, "/proc/sys/vm/overcommit_memory", O_RDONLY); #else fd = open("/proc/sys/vm/overcommit_memory", O_RDONLY); @@ -227,13 +256,13 @@ os_overcommits_proc(void) if (fd == -1) return (false); /* Error. */ -#if defined(JEMALLOC_HAVE_SYSCALL) && defined(SYS_read) +#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_read) nread = (ssize_t)syscall(SYS_read, fd, &buf, sizeof(buf)); #else nread = read(fd, &buf, sizeof(buf)); #endif -#if defined(JEMALLOC_HAVE_SYSCALL) && defined(SYS_close) +#if defined(JEMALLOC_USE_SYSCALL) && defined(SYS_close) syscall(SYS_close, fd); #else close(fd); |