numa plugin: Add plugin for Non-Uniform Memory Access (NUMA).

Change-Id: I2610c7d8f73082154672114ad82001c6bd1b6f14

diff --git a/README b/README
index 69d3b36..e65f46b 100644 (file)
--- a/README
+++ b/README
@@ -196,6 +196,9 @@ Features
       Network UPS tools: UPS current, voltage, power, charge, utilisation,
       temperature, etc. See upsd(8).
 
+    - numa
+      Information about Non-Uniform Memory Access (NUMA).
+
     - olsrd
       Queries routing information from the “Optimized Link State Routing”
       daemon.

diff --git a/configure.in b/configure.in
index 61e61fe..0a0a8f8 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -4433,6 +4433,7 @@ plugin_curl_xml="no"
 plugin_df="no"
 plugin_disk="no"
 plugin_entropy="no"
+plugin_fscache="no"
 plugin_interface="no"
 plugin_ipmi="no"
 plugin_ipvs="no"
@@ -4442,7 +4443,7 @@ plugin_load="no"
 plugin_memory="no"
 plugin_multimeter="no"
 plugin_nfs="no"
-plugin_fscache="no"
+plugin_numa="no"
 plugin_perl="no"
 plugin_processes="no"
 plugin_protocols="no"
@@ -4469,12 +4470,13 @@ then
        plugin_cpufreq="yes"
        plugin_disk="yes"
        plugin_entropy="yes"
+       plugin_fscache="yes"
        plugin_interface="yes"
        plugin_irq="yes"
        plugin_load="yes"
        plugin_memory="yes"
        plugin_nfs="yes"
-       plugin_fscache="yes"
+       plugin_numa="yes"
        plugin_processes="yes"
        plugin_protocols="yes"
        plugin_serial="yes"
@@ -4780,6 +4782,7 @@ AC_PLUGIN([nginx],       [$with_libcurl],      [nginx statistics])
 AC_PLUGIN([notify_desktop], [$with_libnotify], [Desktop notifications])
 AC_PLUGIN([notify_email], [$with_libesmtp],    [Email notifier])
 AC_PLUGIN([ntpd],        [yes],                [NTPd statistics])
+AC_PLUGIN([numa],        [$plugin_numa],       [NUMA virtual memory statistics])
 AC_PLUGIN([nut],         [$with_libupsclient], [Network UPS tools statistics])
 AC_PLUGIN([olsrd],       [yes],                [olsrd statistics])
 AC_PLUGIN([onewire],     [$with_libowcapi],    [OneWire sensor statistics])
@@ -5110,6 +5113,7 @@ Configuration:
     notify_desktop  . . . $enable_notify_desktop
     notify_email  . . . . $enable_notify_email
     ntpd  . . . . . . . . $enable_ntpd
+    numa  . . . . . . . . $enable_numa
     nut . . . . . . . . . $enable_nut
     olsrd . . . . . . . . $enable_olsrd
     onewire . . . . . . . $enable_onewire

diff --git a/src/Makefile.am b/src/Makefile.am
index 0869a08..05f94d9 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -772,6 +772,14 @@ collectd_LDADD += "-dlopen" ntpd.la
 collectd_DEPENDENCIES += ntpd.la
 endif
 
+if BUILD_PLUGIN_NUMA
+pkglib_LTLIBRARIES += numa.la
+numa_la_SOURCES = numa.c
+numa_la_LDFLAGS = -module -avoid-version
+collectd_LDADD += "-dlopen" numa.la
+collectd_DEPENDENCIES += numa.la
+endif
+
 if BUILD_PLUGIN_NUT
 pkglib_LTLIBRARIES += nut.la
 nut_la_SOURCES = nut.c

diff --git a/src/numa.c b/src/numa.c
new file mode 100644 (file)
index 0000000..4b4ef20
--- /dev/null
+++ b/src/numa.c
@@ -0,0 +1,168 @@
+/**
+ * collectd - src/numa.c
+ * Copyright (C) 2012  Florian Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *   Florian Forster <octo at collectd.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+
+#if !KERNEL_LINUX
+# error "No applicable input method."
+#endif
+
+#ifndef NUMA_ROOT_DIR
+# define NUMA_ROOT_DIR "/sys/devices/system/node"
+#endif
+
+static int max_node = -1;
+
+static void numa_dispatch_value (int node, /* {{{ */
+    const char *type_instance, value_t v)
+{
+  value_list_t vl = VALUE_LIST_INIT;
+
+  vl.values = &v;
+  vl.values_len = 1;
+
+  sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+  sstrncpy (vl.plugin, "numa", sizeof (vl.plugin));
+  ssnprintf (vl.plugin_instance, sizeof (vl.plugin_instance), "node%i", node);
+  sstrncpy (vl.type, "vmpage_action", sizeof (vl.type));
+  sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
+
+  plugin_dispatch_values (&vl);
+} /* }}} void numa_dispatch_value */
+
+static int numa_read_node (int node) /* {{{ */
+{
+  char path[PATH_MAX];
+  FILE *fh;
+  char buffer[128];
+  int status;
+  int success;
+
+  ssnprintf (path, sizeof (path), NUMA_ROOT_DIR "/node%i/numastat", node);
+
+  fh = fopen (path, "r");
+  if (fh == NULL)
+  {
+    char errbuf[1024];
+    ERROR ("numa plugin: Reading node %i failed: open(%s): %s",
+        node, path, sstrerror (errno, errbuf, sizeof (errbuf)));
+    return (-1);
+  }
+
+  success = 0;
+  while (fgets (buffer, sizeof (buffer), fh) != NULL)
+  {
+    char *fields[4];
+    value_t v;
+
+    status = strsplit (buffer, fields, STATIC_ARRAY_SIZE (fields));
+    if (status != 2)
+    {
+      WARNING ("numa plugin: Ignoring line with unexpected "
+          "number of fields (node %i).", node);
+      continue;
+    }
+
+    v.derive = 0;
+    status = parse_value (fields[1], &v, DS_TYPE_DERIVE);
+    if (status != 0)
+      continue;
+
+    numa_dispatch_value (node, fields[0], v);
+    success++;
+  }
+
+  fclose (fh);
+  return (success ? 0 : -1);
+} /* }}} int numa_read_node */
+
+static int numa_read (void) /* {{{ */
+{
+  int i;
+  int status;
+  int success;
+
+  if (max_node < 0)
+  {
+    WARNING ("numa plugin: No NUMA nodes were detected.");
+    return (-1);
+  }
+
+  success = 0;
+  for (i = 0; i <= max_node; i++)
+  {
+    status = numa_read_node (i);
+    if (status == 0)
+      success++;
+  }
+
+  return (success ? 0 : -1);
+} /* }}} int numa_read */
+
+static int numa_init (void) /* {{{ */
+{
+  /* Determine the number of nodes on this machine. */
+  while (42)
+  {
+    char path[PATH_MAX];
+    struct stat statbuf;
+    int status;
+
+    ssnprintf (path, sizeof (path), NUMA_ROOT_DIR "/node%i", max_node + 1);
+    memset (&statbuf, 0, sizeof (statbuf));
+
+    status = stat (path, &statbuf);
+    if (status == 0)
+    {
+      max_node++;
+      continue;
+    }
+    else if (errno == ENOENT)
+    {
+      break;
+    }
+    else /* ((status != 0) && (errno != ENOENT)) */
+    {
+      char errbuf[1024];
+      ERROR ("numa plugin: stat(%s) failed: %s", path,
+          sstrerror (errno, errbuf, sizeof (errbuf)));
+      return (-1);
+    }
+  }
+
+  DEBUG ("numa plugin: Found %i nodes.", max_node + 1);
+  return (0);
+} /* }}} int numa_init */
+
+void module_register (void)
+{
+  plugin_register_init ("numa", numa_init);
+  plugin_register_read ("numa", numa_read);
+} /* void module_register */
+
+/* vim: set sw=2 sts=2 et : */