mirror of
https://github.com/AltraMayor/f3.git
synced 2025-09-08 06:38:10 -04:00
46a7f24638
In order to reduce probing time, one needs to time reads, writes, and resets to evaluate how to change the probing algorithm. This patch adds these measurements. A good 256MB drive produced the following measurements: Probe time: 47.57 seconds Probe read op: count=2014, total time=1.72s, avg op time=0.85ms Probe write op: count=2003, total time=45.32s, avg op time=22.62ms Probe reset op: count=3, total time=0.53s, avg op time=175.66ms
57 lines
1.5 KiB
C
57 lines
1.5 KiB
C
#ifndef HEADER_LIBPROBE_H
|
|
#define HEADER_LIBPROBE_H
|
|
|
|
#include <stdint.h>
|
|
|
|
enum fake_type {
|
|
/* Device is good. */
|
|
FKTY_GOOD,
|
|
|
|
/* Device is at least partially damaged. */
|
|
FKTY_BAD,
|
|
|
|
/* Device discards data after a given limit. */
|
|
FKTY_LIMBO,
|
|
|
|
/* Device overwrites data after a given limit. */
|
|
FKTY_WRAPAROUND,
|
|
|
|
/* Device is a sequence of wraparound and limbo regions. */
|
|
FKTY_CHAIN,
|
|
|
|
FKTY_MAX,
|
|
};
|
|
|
|
const char *fake_type_to_name(enum fake_type fake_type);
|
|
|
|
int dev_param_valid(uint64_t real_size_byte,
|
|
uint64_t announced_size_byte, int wrap, int block_order);
|
|
|
|
enum fake_type dev_param_to_type(uint64_t real_size_byte,
|
|
uint64_t announced_size_byte, int wrap, int block_order);
|
|
|
|
struct device;
|
|
|
|
struct device *create_file_device(const char *filename,
|
|
uint64_t real_size_byte, uint64_t fake_size_byte, int wrap,
|
|
int block_order, int keep_file);
|
|
|
|
struct device *create_block_device(const char *filename, int manual_reset);
|
|
|
|
struct device *create_perf_device(struct device *dev);
|
|
void perf_device_sample(struct device *dev,
|
|
uint64_t *pread_count, uint64_t *pread_time_us,
|
|
uint64_t *pwrite_count, uint64_t *pwrite_time_us,
|
|
uint64_t *preset_count, uint64_t *preset_time_us);
|
|
|
|
struct device *create_safe_device(struct device *dev, int max_blocks,
|
|
int min_memory);
|
|
|
|
void free_device(struct device *dev);
|
|
|
|
int probe_device_max_blocks(struct device *dev);
|
|
void probe_device(struct device *dev, uint64_t *preal_size_byte,
|
|
uint64_t *pannounced_size_byte, int *pwrap, int *block_order);
|
|
|
|
#endif /* HEADER_LIBPROBE_H */
|