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https://github.com/AltraMayor/f3.git
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be1f587142
Now F3 and h2testw share the same file format. Guenter Knauf has suggested this feature and got the random-number generator used in h2testw from Harald Bogeholz, the author of h2testw. This change also addresses the issue that the original random-number generator only fills the first 32 bits of the 64 bits of the random numbers on 64-bit machines. Besides the lower entropy on 64-bit machines, this issue was making files generated on 32-bit and 64-bit machines incompatible. Anselm Distelrath was the first to report this issue.
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
#ifndef HEADER_UTILS_H
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#define HEADER_UTILS_H
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#include <stdio.h>
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#include <ctype.h>
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#include <assert.h>
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#include <sys/time.h>
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#include <limits.h>
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#include <stdint.h>
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#define SECTOR_SIZE (512)
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#define GIGABYTES (1024 * 1024 * 1024)
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const char *adjust_unit(double *ptr_bytes);
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/* Return true if @filename matches the regex /^[0-9]+\.h2w$/ */
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int is_my_file(const char *filename);
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/* @filename should be PATH_MAX long. */
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void full_fn_from_number(char *full_fn, const char **filename,
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const char *path, int num);
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static inline long delay_ms(const struct timeval *t1, const struct timeval *t2)
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{
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return (t2->tv_sec - t1->tv_sec) * 1000 +
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(t2->tv_usec - t1->tv_usec) / 1000;
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}
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/* Parse @param and return the start-at parameter.
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* The string must be of the format "--start-at=NUM"; otherwise it returns -1.
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*/
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#define START_AT_TEXT "--start-at="
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int parse_start_at_param(const char *param);
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const int *ls_my_files(const char *path, int start_at);
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void print_header(FILE *f, char *name);
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static inline uint64_t random_number(uint64_t prv_number)
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{
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return prv_number * 4294967311ULL + 17;
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}
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#ifdef APPLE_MAC
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/* For function fcntl. */
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#include <fcntl.h>
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/* For type off_t. */
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#include <unistd.h>
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/* This function is a _rough_ approximation of fdatasync(2). */
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static inline int fdatasync(int fd)
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{
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return fcntl(fd, F_FULLFSYNC);
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}
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#define POSIX_FADV_SEQUENTIAL 2 /* Expect sequential page references. */
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#define POSIX_FADV_DONTNEED 4 /* Don't need these pages. */
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/* This function is a _rough_ approximation of posix_fadvise(2). */
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static inline int posix_fadvise(int fd, off_t offset, off_t len, int advice)
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{
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switch (advice) {
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case POSIX_FADV_SEQUENTIAL:
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return fcntl(fd, F_RDAHEAD, 1);
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case POSIX_FADV_DONTNEED:
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return fcntl(fd, F_NOCACHE, 1);
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default:
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assert(0);
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}
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}
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#endif /* APPLE_MAC */
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#endif /* HEADER_UTILS_H */
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