sd_bench.c File Reference

SD Card benchmarking. More...

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <px4_platform_common/px4_config.h>
#include <px4_platform_common/module.h>
#include <px4_platform_common/getopt.h>
#include <px4_platform_common/log.h>
#include <drivers/drv_hrt.h>

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Functions
static void	usage (void)
static void	write_test (int fd, uint8_t *block, int block_size)
	sequential write speed test More...
static unsigned int	time_fsync (int fd)
	Measure the time for fsync. More...
__EXPORT int	sd_bench_main (int argc, char *argv[])

Variables
static const char *	BENCHMARK_FILE = PX4_STORAGEDIR"/benchmark.tmp"
static int	num_runs
	number of runs More...
static int	run_duration
	duration of a single run [ms] More...
static bool	synchronized
	call fsync after each block? More...

Detailed Description

SD Card benchmarking.

Definition in file sd_bench.c.

Function Documentation

sd_bench_main()

int sd_bench_main	(	int	argc,
		char *	argv[]
	)

Definition at line 85 of file sd_bench.c.

References BENCHMARK_FILE, num_runs, run_duration, usage(), and write_test().

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time_fsync()

unsigned int time_fsync ( int  fd )

inlinestatic

Measure the time for fsync.

Parameters

fd

Returns

time in ms

Definition at line 155 of file sd_bench.c.

References hrt_absolute_time(), hrt_abstime, and hrt_elapsed_time().

Referenced by write_test().

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usage()

static void usage ( void  )

static

Definition at line 73 of file sd_bench.c.

Referenced by sd_bench_main().

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write_test()

void write_test ( int  fd, uint8_t *  block, int  block_size  )

static

sequential write speed test

Definition at line 162 of file sd_bench.c.

References hrt_absolute_time(), hrt_abstime, hrt_elapsed_time(), num_runs, run_duration, start(), time_fsync(), and write().

Referenced by sd_bench_main().

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Variable Documentation

BENCHMARK_FILE

const char* BENCHMARK_FILE = PX4_STORAGEDIR"/benchmark.tmp"

static

Definition at line 66 of file sd_bench.c.

Referenced by sd_bench_main().

num_runs

int num_runs

static

number of runs

Definition at line 68 of file sd_bench.c.

Referenced by sd_bench_main(), and write_test().

run_duration

int run_duration

static

duration of a single run [ms]

Definition at line 69 of file sd_bench.c.

Referenced by sd_bench_main(), and write_test().

synchronized

bool synchronized

static

call fsync after each block?

Definition at line 70 of file sd_bench.c.