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_value(int ioprio_class, int ioprio)
124 * If no class is set, assume BE
127 ioprio_class = IOPRIO_CLASS_BE;
129 return (ioprio_class << IOPRIO_CLASS_SHIFT) | ioprio;
132 static inline bool ioprio_value_is_class_rt(unsigned int priority)
134 return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
137 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
139 return syscall(__NR_ioprio_set, which, who,
140 ioprio_value(ioprio_class, ioprio));
143 #ifndef CONFIG_HAVE_GETTID
144 static inline int gettid(void)
146 return syscall(__NR_gettid);
150 #define SPLICE_DEF_SIZE (64*1024)
153 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
157 #define BLKFLSBUF _IO(0x12,97)
161 #define BLKDISCARD _IO(0x12,119)
164 static inline int blockdev_invalidate_cache(struct fio_file *f)
166 return ioctl(f->fd, BLKFLSBUF);
169 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
171 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
177 static inline unsigned long long os_phys_mem(void)
179 long pagesize, pages;
181 pagesize = sysconf(_SC_PAGESIZE);
182 pages = sysconf(_SC_PHYS_PAGES);
183 if (pages == -1 || pagesize == -1)
186 return (unsigned long long) pages * (unsigned long long) pagesize;
190 #define FIO_O_NOATIME O_NOATIME
192 #define FIO_O_NOATIME 0
196 #define OS_O_ATOMIC O_ATOMIC
198 #define OS_O_ATOMIC 040000000
202 #define FIO_MADV_FREE MADV_REMOVE
205 /* Check for GCC or Clang byte swap intrinsics */
206 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
207 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
208 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
209 #define fio_swap16(x) __builtin_bswap16(x)
210 #define fio_swap32(x) __builtin_bswap32(x)
211 #define fio_swap64(x) __builtin_bswap64(x)
213 #include <byteswap.h>
214 #define fio_swap16(x) bswap_16(x)
215 #define fio_swap32(x) bswap_32(x)
216 #define fio_swap64(x) bswap_64(x)
217 #endif /* fio_swapN */
219 #define CACHE_LINE_FILE \
220 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
222 static inline int arch_cache_line_size(void)
227 fd = open(CACHE_LINE_FILE, O_RDONLY);
231 ret = read(fd, size, sizeof(size));
242 #define FIO_HAVE_CPU_ONLINE_SYSCONF
243 static inline unsigned int cpus_online(void)
245 return sysconf(_SC_NPROCESSORS_CONF);
249 static inline unsigned long long get_fs_free_size(const char *path)
251 unsigned long long ret;
254 if (statfs(path, &s) < 0)
258 ret *= (unsigned long long) s.f_bfree;
262 static inline int os_trim(struct fio_file *f, unsigned long long start,
263 unsigned long long len)
270 if (!ioctl(f->fd, BLKDISCARD, range))
276 #ifdef CONFIG_SCHED_IDLE
277 static inline int fio_set_sched_idle(void)
279 struct sched_param p = { .sched_priority = 0, };
280 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
284 #ifndef F_GET_RW_HINT
285 #ifndef F_LINUX_SPECIFIC_BASE
286 #define F_LINUX_SPECIFIC_BASE 1024
288 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
289 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
290 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
291 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
294 #ifndef RWH_WRITE_LIFE_NONE
295 #define RWH_WRITE_LIFE_NOT_SET 0
296 #define RWH_WRITE_LIFE_NONE 1
297 #define RWH_WRITE_LIFE_SHORT 2
298 #define RWH_WRITE_LIFE_MEDIUM 3
299 #define RWH_WRITE_LIFE_LONG 4
300 #define RWH_WRITE_LIFE_EXTREME 5
303 #define FIO_HAVE_WRITE_HINT
306 #define RWF_HIPRI 0x00000001
309 #define RWF_DSYNC 0x00000002
312 #define RWF_SYNC 0x00000004
315 #define RWF_NOWAIT 0x00000008
319 #define RWF_UNCACHED 0x00000040
322 #ifndef RWF_WRITE_LIFE_SHIFT
323 #define RWF_WRITE_LIFE_SHIFT 4
324 #define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
325 #define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
326 #define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
327 #define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
330 #ifndef CONFIG_PWRITEV2
332 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
335 #if BITS_PER_LONG == 64
339 *pos_l = offset & 0xffffffff;
340 *pos_h = ((uint64_t) offset) >> 32;
343 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
344 off_t offset, unsigned int flags)
346 unsigned long pos_l, pos_h;
348 make_pos_h_l(&pos_h, &pos_l, offset);
349 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
351 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
352 off_t offset, unsigned int flags)
354 unsigned long pos_l, pos_h;
356 make_pos_h_l(&pos_h, &pos_l, offset);
357 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
360 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
361 off_t offset, unsigned int flags)
366 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
367 off_t offset, unsigned int flags)
372 #endif /* __NR_preadv2 */
373 #endif /* CONFIG_PWRITEV2 */
375 static inline int shm_attach_to_open_removed(void)
380 #ifdef CONFIG_LINUX_FALLOCATE
381 #define FIO_HAVE_NATIVE_FALLOCATE
382 static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
386 ret = fallocate(f->fd, 0, offset, len);
390 /* Work around buggy old glibc versions... */
398 #define FIO_HAVE_CPU_HAS
399 static inline bool os_cpu_has(cpu_features feature)
402 unsigned long fio_unused hwcap;
405 #ifdef ARCH_HAVE_CRC_CRYPTO
406 case CPU_ARM64_CRC32C:
407 hwcap = getauxval(AT_HWCAP);
408 have_feature = (hwcap & HWCAP_CRC32) != 0;
412 have_feature = false;