memory plugin: Use the new plugin_dispatch_multivalue() interface.

This takes calculation of percentages off of our hands.

diff --git a/src/memory.c b/src/memory.c
index a4b21da..b1f2e76 100644 (file)
--- a/src/memory.c
+++ b/src/memory.c
@@ -155,32 +155,14 @@ static int memory_init (void)
        return (0);
 } /* int memory_init */
 
-static void memory_submit (const char *type_instance, gauge_t value, gauge_t total)
-{
-       value_t values[1];
-       value_list_t vl = VALUE_LIST_INIT;
-
-       vl.values = values;
-       vl.values_len = 1;
-       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
-       sstrncpy (vl.plugin, "memory", sizeof (vl.plugin));
-       sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
-
-       if (values_absolute)
-       {
-               values[0].gauge = value;
-               sstrncpy (vl.type, "memory", sizeof (vl.type));
-               plugin_dispatch_values (&vl);
-       }
-       if (values_percentage)
-       {
-               values[0].gauge = 100.0 * value / total;
-               sstrncpy (vl.type, "percent", sizeof (vl.type));
-               plugin_dispatch_values (&vl);
-       }
-}
-
-static int memory_read (void)
+#define MEMORY_SUBMIT(...) do { \
+       if (values_absolute) \
+               plugin_dispatch_multivalue (vl, 0, __VA_ARGS__, NULL); \
+       if (values_percentage) \
+               plugin_dispatch_multivalue (vl, 1, __VA_ARGS__, NULL); \
+} while (0)
+
+static int memory_read_internal (value_list_t *vl)
 {
 #if HAVE_HOST_STATISTICS
        kern_return_t status;
@@ -191,7 +173,6 @@ static int memory_read (void)
        gauge_t active;
        gauge_t inactive;
        gauge_t free;
-       gauge_t total;
 
        if (!port_host || !pagesize)
                return (-1);
@@ -229,12 +210,11 @@ static int memory_read (void)
        active   = (gauge_t) (((uint64_t) vm_data.active_count)   * ((uint64_t) pagesize));
        inactive = (gauge_t) (((uint64_t) vm_data.inactive_count) * ((uint64_t) pagesize));
        free     = (gauge_t) (((uint64_t) vm_data.free_count)     * ((uint64_t) pagesize));
-       total    = wired + active + inactive + free;
 
-       memory_submit ("wired",    wired,    total);
-       memory_submit ("active",   active,   total);
-       memory_submit ("inactive", inactive, total);
-       memory_submit ("free",     free,     total);
+       MEMORY_SUBMIT ("wired",    wired,
+                       "active",   active,
+                      "inactive", inactive,
+                      "free",     free);
 /* #endif HAVE_HOST_STATISTICS */
 
 #elif HAVE_SYSCTLBYNAME
@@ -259,7 +239,6 @@ static int memory_read (void)
                NULL
        };
        double sysctl_vals[8];
-       gauge_t total;
 
        int    i;
 
@@ -285,12 +264,11 @@ static int memory_read (void)
                if (!isnan (sysctl_vals[i]))
                        sysctl_vals[i] *= sysctl_vals[0];
 
-       total = sysctl_vals[2] + sysctl_vals[3] + sysctl_vals[4] + sysctl_vals[5] + sysctl_vals[6];
-       memory_submit ("free",     sysctl_vals[2], total);
-       memory_submit ("wired",    sysctl_vals[3], total);
-       memory_submit ("active",   sysctl_vals[4], total);
-       memory_submit ("inactive", sysctl_vals[5], total);
-       memory_submit ("cache",    sysctl_vals[6], total);
+       MEMORY_SUBMIT ("free",     (gauge_t) sysctl_vals[2],
+                      "wired",    (gauge_t) sysctl_vals[3],
+                      "active",   (gauge_t) sysctl_vals[4],
+                      "inactive", (gauge_t) sysctl_vals[5],
+                      "cache",    (gauge_t) sysctl_vals[6]);
 /* #endif HAVE_SYSCTLBYNAME */
 
 #elif KERNEL_LINUX
@@ -300,11 +278,11 @@ static int memory_read (void)
        char *fields[8];
        int numfields;
 
-       long long mem_total = 0;
-       long long mem_used = 0;
-       long long mem_buffered = 0;
-       long long mem_cached = 0;
-       long long mem_free = 0;
+       gauge_t mem_total = 0;
+       gauge_t mem_used = 0;
+       gauge_t mem_buffered = 0;
+       gauge_t mem_cached = 0;
+       gauge_t mem_free = 0;
 
        if ((fh = fopen ("/proc/meminfo", "r")) == NULL)
        {
@@ -314,9 +292,9 @@ static int memory_read (void)
                return (-1);
        }
 
-       while (fgets (buffer, 1024, fh) != NULL)
+       while (fgets (buffer, sizeof (buffer), fh) != NULL)
        {
-               long long *val = NULL;
+               gauge_t *val = NULL;
 
                if (strncasecmp (buffer, "MemTotal:", 9) == 0)
                        val = &mem_total;
@@ -329,12 +307,11 @@ static int memory_read (void)
                else
                        continue;
 
-               numfields = strsplit (buffer, fields, 8);
-
+               numfields = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
                if (numfields < 2)
                        continue;
 
-               *val = atoll (fields[1]) * 1024LL;
+               *val = 1024.0 * atof (fields[1]);
        }
 
        if (fclose (fh))
@@ -345,13 +322,13 @@ static int memory_read (void)
        }
 
        if (mem_total < (mem_free + mem_buffered + mem_cached))
-               return (0);
+               return (-1);
 
        mem_used = mem_total - (mem_free + mem_buffered + mem_cached);
-       memory_submit ("used",     (gauge_t) mem_used,     (gauge_t) mem_total);
-       memory_submit ("buffered", (gauge_t) mem_buffered, (gauge_t) mem_total);
-       memory_submit ("cached",   (gauge_t) mem_cached,   (gauge_t) mem_total);
-       memory_submit ("free",     (gauge_t) mem_free,     (gauge_t) mem_total);
+       MEMORY_SUBMIT ("used",     mem_used,
+                      "buffered", mem_buffered,
+                      "cached",   mem_cached,
+                      "free",     mem_free);
 /* #endif KERNEL_LINUX */
 
 #elif HAVE_LIBKSTAT
@@ -423,13 +400,12 @@ static int memory_read (void)
        mem_lock *= pagesize; /* some? ;) */
        mem_kern *= pagesize; /* it's 2011 RAM is cheap */
        mem_unus *= pagesize;
-       mem_total = mem_used + mem_free + mem_lock + mem_kern + mem_unus;
 
-       memory_submit ("used",     (gauge_t) mem_used, (gauge_t) mem_total);
-       memory_submit ("free",     (gauge_t) mem_free, (gauge_t) mem_total);
-       memory_submit ("locked",   (gauge_t) mem_lock, (gauge_t) mem_total);
-       memory_submit ("kernel",   (gauge_t) mem_kern, (gauge_t) mem_total);
-       memory_submit ("unusable", (gauge_t) mem_unus, (gauge_t) mem_total);
+       MEMORY_SUBMIT ("used",     (gauge_t) mem_used,
+                      "free",     (gauge_t) mem_free,
+                      "locked",   (gauge_t) mem_lock,
+                      "kernel",   (gauge_t) mem_kern,
+                      "unusable", (gauge_t) mem_unus);
 /* #endif HAVE_LIBKSTAT */
 
 #elif HAVE_SYSCTL
@@ -438,7 +414,6 @@ static int memory_read (void)
        gauge_t mem_active;
        gauge_t mem_inactive;
        gauge_t mem_free;
-       gauge_t mem_total;
        size_t size;
 
        memset (&vmtotal, 0, sizeof (vmtotal));
@@ -455,25 +430,22 @@ static int memory_read (void)
        mem_active   = (gauge_t) (vmtotal.t_arm * pagesize);
        mem_inactive = (gauge_t) ((vmtotal.t_rm - vmtotal.t_arm) * pagesize);
        mem_free     = (gauge_t) (vmtotal.t_free * pagesize);
-       mem_total    = mem_active + mem_inactive + mem_free;
 
-       memory_submit ("active",   mem_active,   mem_total);
-       memory_submit ("inactive", mem_inactive, mem_total);
-       memory_submit ("free",     mem_free,     mem_total);
+       MEMORY_SUBMIT ("active",   mem_active,
+                      "inactive", mem_inactive,
+                      "free",     mem_free);
 /* #endif HAVE_SYSCTL */
 
 #elif HAVE_LIBSTATGRAB
        sg_mem_stats *ios;
-       gauge_t total;
 
        ios = sg_get_mem_stats ();
        if (ios == NULL)
                return (-1);
 
-       total = (gauge_t) (ios->used + ios->cache + ios->free);
-       memory_submit ("used",   (gauge_t) ios->used,  total);
-       memory_submit ("cached", (gauge_t) ios->cache, total);
-       memory_submit ("free",   (gauge_t) ios->free,  total);
+       MEMORY_SUBMIT ("used",   (gauge_t) ios->used,
+                      "cached", (gauge_t) ios->cache,
+                      "free",   (gauge_t) ios->free);
 /* #endif HAVE_LIBSTATGRAB */
 
 #elif HAVE_PERFSTAT
@@ -498,14 +470,28 @@ static int memory_read (void)
         *   real_total = real_free + real_inuse
         *   real_inuse = "active" + real_pinned + numperm
         */
-       memory_submit ("free",   pmemory.real_free    * pagesize, pmemory.real_total * pagesize);
-       memory_submit ("cached", pmemory.numperm      * pagesize, pmemory.real_total * pagesize);
-       memory_submit ("system", pmemory.real_system  * pagesize, pmemory.real_total * pagesize);
-       memory_submit ("user",   pmemory.real_process * pagesize, pmemory.real_total * pagesize);
+       MEMORY_SUBMIT ("free",   (gauge_t) (pmemory.real_free    * pagesize),
+                      "cached", (gauge_t) (pmemory.numperm      * pagesize),
+                      "system", (gauge_t) (pmemory.real_system  * pagesize),
+                      "user",   (gauge_t) (pmemory.real_process * pagesize));
 #endif /* HAVE_PERFSTAT */
 
        return (0);
-}
+} /* }}} int memory_read_internal */
+
+static int memory_read (void) /* {{{ */
+{
+       value_t v[1];
+       value_list_t vl = VALUE_LIST_INIT;
+
+       vl.values = v;
+       vl.values_len = STATIC_ARRAY_SIZE (v);
+       sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+       sstrncpy (vl.plugin, "memory", sizeof (vl.plugin));
+       vl.time = cdtime ();
+
+       return (memory_read_internal (&vl));
+} /* }}} int memory_read */
 
 void module_register (void)
 {