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apps/examples/stat: Add logic to monitor memory usage.

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This commit is contained in:
Gregory Nutt 2017-02-13 14:57:36 -06:00
parent 740b528199
commit c3c8de6b70
1 changed files with 73 additions and 2 deletions
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75
examples/stat/stat_main.c
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@ -42,13 +42,68 @@
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
/****************************************************************************
* Private Data
****************************************************************************/
static struct mallinfo g_mmbefore;
static struct mallinfo g_mmprevious;
static struct mallinfo g_mmafter;
/****************************************************************************
* Private Functions
****************************************************************************/
static void showusage(struct mallinfo *mmbefore, struct mallinfo *mmafter)
{
printf("VARIABLE BEFORE AFTER\n");
printf("======== ======== ========\n");
printf("arena %8x %8x\n", mmbefore->arena, mmafter->arena);
printf("ordblks %8d %8d\n", mmbefore->ordblks, mmafter->ordblks);
printf("mxordblk %8x %8x\n", mmbefore->mxordblk, mmafter->mxordblk);
printf("uordblks %8x %8x\n", mmbefore->uordblks, mmafter->uordblks);
printf("fordblks %8x %8x\n", mmbefore->fordblks, mmafter->fordblks);
}
static void stepusage(void)
{
/* Get the current memory usage */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmafter = mallinfo();
#else
(void)mallinfo(&g_mmafter);
#endif
/* Show the change from the previous loop */
printf("\nStep memory usage:\n");
showusage(&g_mmprevious, &g_mmafter);
/* Set up for the next test */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmprevious = g_mmafter;
#else
memcpy(&g_mmprevious, &g_mmafter, sizeof(struct mallinfo));
#endif
}
static void endusage(void)
{
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmafter = mallinfo();
#else
(void)mallinfo(&g_mmafter);
#endif
printf("\nFinal memory usage:\n");
showusage(&g_mmbefore, &g_mmafter);
}
static void dump_stat(FAR struct stat *buf)
{
FAR const char *typename;
@ -90,7 +145,7 @@ static void dump_stat(FAR struct stat *buf)
typename = "Unknown file type";
}
printf("stat:\n");
printf("\nstat:\n");
printf(" st_mode: %04x\n", buf->st_mode);
printf(" %s\n", typename);
printf(" st_size: %llu\n", (unsigned long long)buf->st_size);
@ -103,7 +158,7 @@ static void dump_stat(FAR struct stat *buf)
static void dump_statfs(FAR struct statfs *buf)
{
printf("statfs:\n");
printf("\nstatfs:\n");
printf(" f_type: %lu\n", (unsigned long)buf->f_type);
printf(" f_namelen: %lu\n", (unsigned long)buf->f_namelen);
printf(" f_bsize: %lu\n", (unsigned long)buf->f_bsize);
@ -147,6 +202,16 @@ int stat_main(int argc, char *argv[])
path = argv[1];
printf("Testing path: \"%s\"\n", path);
/* Set up memory monitoring */
#ifdef CONFIG_CAN_PASS_STRUCTS
g_mmbefore = mallinfo();
g_mmprevious = g_mmbefore;
#else
(void)mallinfo(&g_mmbefore);
memcpy(&g_mmprevious, &g_mmbefore, sizeof(struct mallinfo));
#endif
/* Try stat first */
ret = stat(path, &statbuf);
@ -160,6 +225,7 @@ int stat_main(int argc, char *argv[])
}
dump_stat(&statbuf);
stepusage();
isreg = S_ISREG(statbuf.st_mode);
/* Try statfs */
@ -174,6 +240,7 @@ int stat_main(int argc, char *argv[])
}
dump_statfs(&statfsbuf);
stepusage();
/* Try fstat (only if it is a regular file) */
@ -189,6 +256,8 @@ int stat_main(int argc, char *argv[])
return EXIT_FAILURE;
}
stepusage();
ret = fstat(fd, &statbuf);
if (ret < 0)
{
@ -202,8 +271,10 @@ int stat_main(int argc, char *argv[])
dump_stat(&statbuf);
}
stepusage();
close(fd);
}
endusage();
return 0;
}