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THP detection / reporting functions added.

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This commit is contained in:
antirez
2014-11-12 10:43:32 +01:00
parent bb7fea0d5c
commit 3ef0876b95
3 changed files with 45 additions and 6 deletions
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24
src/zmalloc.c
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@ -328,27 +328,39 @@ float zmalloc_get_fragmentation_ratio(size_t rss) {
return (float)rss/zmalloc_used_memory();
}
/* Get the sum of the specified field (converted form kb to bytes) in
* /proc/self/smaps. The field must be specified with trailing ":" as it
* apperas in the smaps output.
*
* Example: zmalloc_get_smap_bytes_by_field("Rss:");
*/
#if defined(HAVE_PROC_SMAPS)
size_t zmalloc_get_private_dirty(void) {
size_t zmalloc_get_smap_bytes_by_field(char *field) {
char line[1024];
size_t pd = 0;
size_t bytes = 0;
FILE *fp = fopen("/proc/self/smaps","r");
int flen = strlen(field);
if (!fp) return 0;
while(fgets(line,sizeof(line),fp) != NULL) {
if (strncmp(line,"Private_Dirty:",14) == 0) {
if (strncmp(line,field,flen) == 0) {
char *p = strchr(line,'k');
if (p) {
*p = '\0';
pd += strtol(line+14,NULL,10) * 1024;
bytes += strtol(line+flen,NULL,10) * 1024;
}
}
}
fclose(fp);
return pd;
return bytes;
}
#else
size_t zmalloc_get_private_dirty(void) {
size_t zmalloc_get_smap_bytes_by_field(char *field) {
REDIS_NOTUSED(field);
return 0;
}
#endif
size_t zmalloc_get_private_dirty(void) {
return zmalloc_get_smap_bytes_by_field("Private_Dirty:");
}