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_PMULL (1 << 4)
25 #endif /* HWCAP_PMULL */
27 #define HWCAP_CRC32 (1 << 7)
28 #endif /* HWCAP_CRC32 */
29 #endif /* ARCH_HAVE_CRC_CRYPTO */
31 #include "./os-linux-syscall.h"
34 #ifndef __has_builtin // Optional of course.
35 #define __has_builtin(x) 0 // Compatibility with non-clang compilers.
38 #define FIO_HAVE_CPU_AFFINITY
39 #define FIO_HAVE_DISK_UTIL
41 #define FIO_HAVE_IOPRIO
42 #define FIO_HAVE_IOPRIO_CLASS
43 #define FIO_HAVE_IOSCHED_SWITCH
44 #define FIO_HAVE_ODIRECT
45 #define FIO_HAVE_HUGETLB
46 #define FIO_HAVE_BLKTRACE
47 #define FIO_HAVE_CL_SIZE
48 #define FIO_HAVE_CGROUPS
49 #define FIO_HAVE_FS_STAT
51 #define FIO_HAVE_GETTID
52 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
53 #define FIO_HAVE_PWRITEV2
54 #define FIO_HAVE_SHM_ATTACH_REMOVED
57 #define FIO_HAVE_MMAP_HUGE
60 #define OS_MAP_ANON MAP_ANONYMOUS
62 #define FIO_EXT_ENG_DIR "/usr/local/lib/fio"
64 typedef cpu_set_t os_cpu_mask_t;
66 #ifdef CONFIG_3ARG_AFFINITY
67 #define fio_setaffinity(pid, cpumask) \
68 sched_setaffinity((pid), sizeof(cpumask), &(cpumask))
69 #define fio_getaffinity(pid, ptr) \
70 sched_getaffinity((pid), sizeof(cpu_set_t), (ptr))
71 #elif defined(CONFIG_2ARG_AFFINITY)
72 #define fio_setaffinity(pid, cpumask) \
73 sched_setaffinity((pid), &(cpumask))
74 #define fio_getaffinity(pid, ptr) \
75 sched_getaffinity((pid), (ptr))
78 #ifdef CONFIG_PTHREAD_GETAFFINITY
79 #define FIO_HAVE_GET_THREAD_AFFINITY
80 #define fio_get_thread_affinity(mask) \
81 pthread_getaffinity_np(pthread_self(), sizeof(mask), &(mask))
84 #define fio_cpu_clear(mask, cpu) (void) CPU_CLR((cpu), (mask))
85 #define fio_cpu_set(mask, cpu) (void) CPU_SET((cpu), (mask))
86 #define fio_cpu_isset(mask, cpu) (CPU_ISSET((cpu), (mask)) != 0)
87 #define fio_cpu_count(mask) CPU_COUNT((mask))
89 static inline int fio_cpuset_init(os_cpu_mask_t *mask)
95 static inline int fio_cpuset_exit(os_cpu_mask_t *mask)
100 #define FIO_MAX_CPUS CPU_SETSIZE
110 IOPRIO_WHO_PROCESS = 1,
115 #define IOPRIO_BITS 16
116 #define IOPRIO_CLASS_SHIFT 13
118 #define IOPRIO_MIN_PRIO 0 /* highest priority */
119 #define IOPRIO_MAX_PRIO 7 /* lowest priority */
121 #define IOPRIO_MIN_PRIO_CLASS 0
122 #define IOPRIO_MAX_PRIO_CLASS 3
124 static inline int ioprio_value(int ioprio_class, int ioprio)
127 * If no class is set, assume BE
130 ioprio_class = IOPRIO_CLASS_BE;
132 return (ioprio_class << IOPRIO_CLASS_SHIFT) | ioprio;
135 static inline bool ioprio_value_is_class_rt(unsigned int priority)
137 return (priority >> IOPRIO_CLASS_SHIFT) == IOPRIO_CLASS_RT;
140 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
142 return syscall(__NR_ioprio_set, which, who,
143 ioprio_value(ioprio_class, ioprio));
146 #ifndef CONFIG_HAVE_GETTID
147 static inline int gettid(void)
149 return syscall(__NR_gettid);
153 #define SPLICE_DEF_SIZE (64*1024)
156 #define BLKGETSIZE64 _IOR(0x12,114,size_t)
160 #define BLKFLSBUF _IO(0x12,97)
164 #define BLKDISCARD _IO(0x12,119)
167 static inline int blockdev_invalidate_cache(struct fio_file *f)
169 return ioctl(f->fd, BLKFLSBUF);
172 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
174 if (!ioctl(f->fd, BLKGETSIZE64, bytes))
180 static inline unsigned long long os_phys_mem(void)
182 long pagesize, pages;
184 pagesize = sysconf(_SC_PAGESIZE);
185 pages = sysconf(_SC_PHYS_PAGES);
186 if (pages == -1 || pagesize == -1)
189 return (unsigned long long) pages * (unsigned long long) pagesize;
193 #define FIO_O_NOATIME O_NOATIME
195 #define FIO_O_NOATIME 0
199 #define OS_O_ATOMIC O_ATOMIC
201 #define OS_O_ATOMIC 040000000
205 #define FIO_MADV_FREE MADV_REMOVE
208 /* Check for GCC or Clang byte swap intrinsics */
209 #if (__has_builtin(__builtin_bswap16) && __has_builtin(__builtin_bswap32) \
210 && __has_builtin(__builtin_bswap64)) || (__GNUC__ > 4 \
211 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)) /* fio_swapN */
212 #define fio_swap16(x) __builtin_bswap16(x)
213 #define fio_swap32(x) __builtin_bswap32(x)
214 #define fio_swap64(x) __builtin_bswap64(x)
216 #include <byteswap.h>
217 #define fio_swap16(x) bswap_16(x)
218 #define fio_swap32(x) bswap_32(x)
219 #define fio_swap64(x) bswap_64(x)
220 #endif /* fio_swapN */
222 #define CACHE_LINE_FILE \
223 "/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
225 static inline int arch_cache_line_size(void)
230 fd = open(CACHE_LINE_FILE, O_RDONLY);
234 ret = read(fd, size, sizeof(size));
245 #define FIO_HAVE_CPU_ONLINE_SYSCONF
246 static inline unsigned int cpus_online(void)
248 return sysconf(_SC_NPROCESSORS_CONF);
252 static inline unsigned long long get_fs_free_size(const char *path)
254 unsigned long long ret;
257 if (statfs(path, &s) < 0)
261 ret *= (unsigned long long) s.f_bfree;
265 static inline int os_trim(struct fio_file *f, unsigned long long start,
266 unsigned long long len)
273 if (!ioctl(f->fd, BLKDISCARD, range))
279 #ifdef CONFIG_SCHED_IDLE
280 static inline int fio_set_sched_idle(void)
282 struct sched_param p = { .sched_priority = 0, };
283 return sched_setscheduler(gettid(), SCHED_IDLE, &p);
287 #ifndef F_GET_RW_HINT
288 #ifndef F_LINUX_SPECIFIC_BASE
289 #define F_LINUX_SPECIFIC_BASE 1024
291 #define F_GET_RW_HINT (F_LINUX_SPECIFIC_BASE + 11)
292 #define F_SET_RW_HINT (F_LINUX_SPECIFIC_BASE + 12)
293 #define F_GET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 13)
294 #define F_SET_FILE_RW_HINT (F_LINUX_SPECIFIC_BASE + 14)
297 #ifndef RWH_WRITE_LIFE_NONE
298 #define RWH_WRITE_LIFE_NOT_SET 0
299 #define RWH_WRITE_LIFE_NONE 1
300 #define RWH_WRITE_LIFE_SHORT 2
301 #define RWH_WRITE_LIFE_MEDIUM 3
302 #define RWH_WRITE_LIFE_LONG 4
303 #define RWH_WRITE_LIFE_EXTREME 5
306 #define FIO_HAVE_WRITE_HINT
309 #define RWF_HIPRI 0x00000001
312 #define RWF_DSYNC 0x00000002
315 #define RWF_SYNC 0x00000004
318 #define RWF_NOWAIT 0x00000008
322 #define RWF_UNCACHED 0x00000040
325 #ifndef RWF_WRITE_LIFE_SHIFT
326 #define RWF_WRITE_LIFE_SHIFT 4
327 #define RWF_WRITE_LIFE_SHORT (1 << RWF_WRITE_LIFE_SHIFT)
328 #define RWF_WRITE_LIFE_MEDIUM (2 << RWF_WRITE_LIFE_SHIFT)
329 #define RWF_WRITE_LIFE_LONG (3 << RWF_WRITE_LIFE_SHIFT)
330 #define RWF_WRITE_LIFE_EXTREME (4 << RWF_WRITE_LIFE_SHIFT)
333 #ifndef CONFIG_PWRITEV2
335 static inline void make_pos_h_l(unsigned long *pos_h, unsigned long *pos_l,
338 #if BITS_PER_LONG == 64
342 *pos_l = offset & 0xffffffff;
343 *pos_h = ((uint64_t) offset) >> 32;
346 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
347 off_t offset, unsigned int flags)
349 unsigned long pos_l, pos_h;
351 make_pos_h_l(&pos_h, &pos_l, offset);
352 return syscall(__NR_preadv2, fd, iov, iovcnt, pos_l, pos_h, flags);
354 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
355 off_t offset, unsigned int flags)
357 unsigned long pos_l, pos_h;
359 make_pos_h_l(&pos_h, &pos_l, offset);
360 return syscall(__NR_pwritev2, fd, iov, iovcnt, pos_l, pos_h, flags);
363 static inline ssize_t preadv2(int fd, const struct iovec *iov, int iovcnt,
364 off_t offset, unsigned int flags)
369 static inline ssize_t pwritev2(int fd, const struct iovec *iov, int iovcnt,
370 off_t offset, unsigned int flags)
375 #endif /* __NR_preadv2 */
376 #endif /* CONFIG_PWRITEV2 */
378 static inline int shm_attach_to_open_removed(void)
383 #ifdef CONFIG_LINUX_FALLOCATE
384 #define FIO_HAVE_NATIVE_FALLOCATE
385 static inline bool fio_fallocate(struct fio_file *f, uint64_t offset,
389 ret = fallocate(f->fd, 0, offset, len);
393 /* Work around buggy old glibc versions... */
401 #define FIO_HAVE_CPU_HAS
402 static inline bool os_cpu_has(cpu_features feature)
405 unsigned long fio_unused hwcap;
408 #ifdef ARCH_HAVE_CRC_CRYPTO
409 case CPU_ARM64_CRC32C:
410 hwcap = getauxval(AT_HWCAP);
411 have_feature = (hwcap & (HWCAP_PMULL | HWCAP_CRC32)) ==
412 (HWCAP_PMULL | HWCAP_CRC32);
416 have_feature = false;