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perf: add documentation

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This commit is contained in:
Beat Küng
2017-07-14 11:57:11 +02:00
parent ba1a483cd6
commit 16e0e1f7ca
1 changed files with 14 additions and 20 deletions
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src/systemcmds/perf/perf.c
+14 -20
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@@ -31,36 +31,30 @@
* *
****************************************************************************/ ****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <px4_config.h> #include <px4_config.h>
#include <px4_module.h>
#include <unistd.h> #include <unistd.h>
#include <stdio.h> #include <stdio.h>
#include <string.h> #include <string.h>
#include "systemlib/perf_counter.h" #include "systemlib/perf_counter.h"
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
__EXPORT int perf_main(int argc, char *argv[]); __EXPORT int perf_main(int argc, char *argv[]);
/****************************************************************************
* user_start static void print_usage(void)
****************************************************************************/ {
PRINT_MODULE_DESCRIPTION("Tool to print performance counters");
PRINT_MODULE_USAGE_NAME_SIMPLE("perf", "command");
PRINT_MODULE_USAGE_COMMAND_DESCR("reset", "Reset all counters");
PRINT_MODULE_USAGE_COMMAND_DESCR("latency", "Print HRT timer latency histogram");
PRINT_MODULE_USAGE_PARAM_COMMENT("Prints all performance counters if no arguments given");
}
int perf_main(int argc, char *argv[]) int perf_main(int argc, char *argv[])
{ {
@@ -75,7 +69,7 @@ int perf_main(int argc, char *argv[])
return 0; return 0;
} }
printf("Usage: perf [reset | latency]\n"); print_usage();
return -1; return -1;
} }