4 #define FIO_OS os_linux
8 #include <sys/syscall.h>
9 #include <sys/sysmacros.h>
16 #include <linux/unistd.h>
17 #include <linux/major.h>
21 #ifdef ARCH_HAVE_CRC_CRYPTO
24 #define HWCAP_CRC32 (1 << 7)
25 #endif /* HWCAP_CRC32 */
26 #endif /* ARCH_HAVE_CRC_CRYPTO */
28 #include "./os-linux-syscall.h"
31 #ifndef __has_builtin // Optional of course.
32 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
35 #define FIO_HAVE_CPU_AFFINITY
36 #define FIO_HAVE_DISK_UTIL
38 #define FIO_HAVE_IOPRIO
39 #define FIO_HAVE_IOPRIO_CLASS
40 #define FIO_HAVE_IOSCHED_SWITCH
41 #define FIO_HAVE_ODIRECT
42 #define FIO_HAVE_HUGETLB
43 #define FIO_HAVE_BLKTRACE
44 #define FIO_HAVE_CL_SIZE
45 #define FIO_HAVE_CGROUPS
46 #define FIO_HAVE_FS_STAT
48 #define FIO_HAVE_GETTID
49 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
50 #define FIO_HAVE_PWRITEV2
51 #define FIO_HAVE_SHM_ATTACH_REMOVED
54 #define FIO_HAVE_MMAP_HUGE
57 #define OS_MAP_ANON MAP_ANONYMOUS
59 #define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
61 typedef cpu_set_t os_cpu_mask_t;
63 #ifdef CONFIG_3ARG_AFFINITY
64 #define fio_setaffinity(pid, cpumask) \
65 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
66 #define fio_getaffinity(pid, ptr) \
67 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
68 #elif defined(CONFIG_2ARG_AFFINITY)
69 #define fio_setaffinity(pid, cpumask) \
70 sched_setaffinity((pid), &(cpumask))
71 #define fio_getaffinity(pid, ptr) \
72 sched_getaffinity((pid), (ptr))
75 #ifdef CONFIG_PTHREAD_GETAFFINITY
76 #define FIO_HAVE_GET_THREAD_AFFINITY
77 #define fio_get_thread_affinity(mask) \
78 pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
81 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
82 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
83 #define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
84 #define fio_cpu_count(mask) CPU_COUNT((mask))
86 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
92 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
97 #define FIO_MAX_CPUS CPU_SETSIZE
107 IOPRIO_WHO_PROCESS = 1,
112 #define IOPRIO_BITS 16
113 #define IOPRIO_CLASS_SHIFT 13
115 #define IOPRIO_MIN_PRIO 0 /* highest priority */
116 #define IOPRIO_MAX_PRIO 7 /* lowest priority */
118 #define IOPRIO_MIN_PRIO_CLASS 0
119 #define IOPRIO_MAX_PRIO_CLASS 3
121 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
124 * If no class is set, assume BE
127 ioprio_class = IOPRIO_CLASS_BE;
129 ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
130 return syscall(__NR_ioprio_set, which, who, ioprio);
133 #ifndef CONFIG_HAVE_GETTID
134 static inline int gettid(void)
136 return syscall(__NR_gettid);
140 #define SPLICE_DEF_SIZE (64*1024)
143 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
147 #define BLKFLSBUF _IO(0x12,97)
151 #define BLKDISCARD _IO(0x12,119)
154 static inline int blockdev_invalidate_cache(struct fio_file *f)
156 return ioctl(f->fd, BLKFLSBUF);
159 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
161 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
167 static inline unsigned long long os_phys_mem(void)
169 long pagesize, pages;
171 pagesize = sysconf(_SC_PAGESIZE);
172 pages = sysconf(_SC_PHYS_PAGES);
173 if (pages == -1 || pagesize == -1)
176 return (unsigned long long) pages * (unsigned long long) pagesize;
180 #define FIO_O_NOATIME O_NOATIME
182 #define FIO_O_NOATIME 0
186 #define OS_O_ATOMIC O_ATOMIC
188 #define OS_O_ATOMIC 040000000
192 #define FIO_MADV_FREE MADV_REMOVE
195 /* Check for GCC or Clang byte swap intrinsics */
196 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
197 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
198 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
199 #define fio_swap16(x) __builtin_bswap16(x)
200 #define fio_swap32(x) __builtin_bswap32(x)
201 #define fio_swap64(x) __builtin_bswap64(x)
203 #include <byteswap.h>
204 #define fio_swap16(x) bswap_16(x)
205 #define fio_swap32(x) bswap_32(x)
206 #define fio_swap64(x) bswap_64(x)
207 #endif /* fio_swapN */
209 #define CACHE_LINE_FILE \
210 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
212 static inline int arch_cache_line_size(void)
217 fd = open(CACHE_LINE_FILE, O_RDONLY);
221 ret = read(fd, size, sizeof(size));
232 #define FIO_HAVE_CPU_ONLINE_SYSCONF
233 static inline unsigned int cpus_online(void)
235 return sysconf(_SC_NPROCESSORS_CONF);
239 static inline unsigned long long get_fs_free_size(const char *path)
241 unsigned long long ret;
244 if (statfs(path, &s) < 0)
248 ret *= (unsigned long long) s.f_bfree;
252 static inline int os_trim(struct fio_file *f, unsigned long long start,
253 unsigned long long len)
260 if (!ioctl(f->fd, BLKDISCARD, range))
266 #ifdef CONFIG_SCHED_IDLE
267 static inline int fio_set_sched_idle(void)
269 struct sched_param p = { .sched_priority = 0, };
270 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
274 #ifndef F_GET_RW_HINT
275 #ifndef F_LINUX_SPECIFIC_BASE
276 #define F_LINUX_SPECIFIC_BASE 1024
278 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
279 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
280 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
281 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
284 #ifndef RWH_WRITE_LIFE_NONE
285 #define RWH_WRITE_LIFE_NOT_SET 0
286 #define RWH_WRITE_LIFE_NONE 1
287 #define RWH_WRITE_LIFE_SHORT 2
288 #define RWH_WRITE_LIFE_MEDIUM 3
289 #define RWH_WRITE_LIFE_LONG 4
290 #define RWH_WRITE_LIFE_EXTREME 5
293 #define FIO_HAVE_WRITE_HINT
296 #define RWF_HIPRI 0x00000001
299 #define RWF_DSYNC 0x00000002
302 #define RWF_SYNC 0x00000004
305 #define RWF_NOWAIT 0x00000008
309 #define RWF_UNCACHED 0x00000040
312 #ifndef RWF_WRITE_LIFE_SHIFT
313 #define RWF_WRITE_LIFE_SHIFT 4
314 #define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
315 #define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
316 #define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
317 #define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
320 #ifndef CONFIG_PWRITEV2
322 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
325 #if BITS_PER_LONG == 64
329 *pos_l = offset & 0xffffffff;
330 *pos_h = ((uint64_t) offset) >> 32;
333 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
334 off_t offset, unsigned int flags)
336 unsigned long pos_l, pos_h;
338 make_pos_h_l(&pos_h, &pos_l, offset);
339 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
341 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
342 off_t offset, unsigned int flags)
344 unsigned long pos_l, pos_h;
346 make_pos_h_l(&pos_h, &pos_l, offset);
347 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
350 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
351 off_t offset, unsigned int flags)
356 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
357 off_t offset, unsigned int flags)
362 #endif /* __NR_preadv2 */
363 #endif /* CONFIG_PWRITEV2 */
365 static inline int shm_attach_to_open_removed(void)
370 #ifdef CONFIG_LINUX_FALLOCATE
371 #define FIO_HAVE_NATIVE_FALLOCATE
372 static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
376 ret = fallocate(f->fd, 0, offset, len);
380 /* Work around buggy old glibc versions... */
388 #define FIO_HAVE_CPU_HAS
389 static inline bool os_cpu_has(cpu_features feature)
392 unsigned long fio_unused hwcap;
395 #ifdef ARCH_HAVE_CRC_CRYPTO
396 case CPU_ARM64_CRC32C:
397 hwcap = getauxval(AT_HWCAP);
398 have_feature = (hwcap & HWCAP_CRC32) != 0;
402 have_feature = false;