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Anonymous committed 3bfeb9c

zmalloc_get_private_dirty() function added (Linux only).

For non Linux systmes it just returns 0.

This function is useful to estimate copy-on-write because of childs
saving stuff on disk.

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  • Parent commits af0b220

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Files changed (2)

File src/zmalloc.c

 float zmalloc_get_fragmentation_ratio(void) {
     return (float)zmalloc_get_rss()/zmalloc_used_memory();
 }
+
+#if defined(HAVE_PROCFS)
+size_t zmalloc_get_private_dirty(void) {
+    char line[1024];
+    size_t pd = 0;
+    FILE *fp = fopen("/proc/self/smaps","r");
+
+    if (!fp) return 0;
+    while(fgets(line,sizeof(line),fp) != NULL) {
+        if (strncmp(line,"Private_Dirty:",14) == 0) {
+            char *p = strchr(line,'k');
+            if (p) {
+                *p = '\0';
+                pd += strtol(line+14,NULL,10) * 1024;
+            }
+        }
+    }
+    fclose(fp);
+    return pd;
+}
+#else
+size_t zmalloc_get_private_dirty(void) {
+    return 0;
+}
+#endif

File src/zmalloc.h

 void zmalloc_set_oom_handler(void (*oom_handler)(size_t));
 float zmalloc_get_fragmentation_ratio(void);
 size_t zmalloc_get_rss(void);
+size_t zmalloc_get_private_dirty(void);
 void zlibc_free(void *ptr);
 
 #ifndef HAVE_MALLOC_SIZE