From 41a8b01c6dfb5e5660a7d0029338777d01019feb Mon Sep 17 00:00:00 2001
From: Pim van den Berg
Date: Sat, 22 Jun 2013 12:55:06 +0200
Subject: overview: add color to load averages

The load average number turns:

* orange
When the load is higher than the number of cpu cores.

* red
When the load is more than twice as high as the number of cpu cores.
---
 inc/html.inc.php | 15 +++++++++++----
 layout/style.css | 11 +++++++++++
 2 files changed, 22 insertions(+), 4 deletions(-)

diff --git a/inc/html.inc.php b/inc/html.inc.php
index 0a33da5..015225e 100644
--- a/inc/html.inc.php
+++ b/inc/html.inc.php
@@ -173,6 +173,8 @@ function host_summary($cat, $hosts) {
 	foreach($hosts as $host) {
 		$host_counter++;
 
+		$cores = count(group_plugindata(collectd_plugindata($host, 'cpu')));
+
 		printf('<tr class="%s">', $row_style[$host_counter % 2]);
 		printf('<th><a href="%shost.php?h=%s">%s</a></th>',
 			$CONFIG['weburl'],$host, $host);
@@ -189,10 +191,15 @@ function host_summary($cat, $hosts) {
 				isset($rrd_info['ds[midterm].last_ds']) &&
 				isset($rrd_info['ds[longterm].last_ds'])) {
 
-				printf('<td>%.2f</td><td>%.2f</td><td>%.2f</td>',
-					$rrd_info['ds[shortterm].last_ds'],
-					$rrd_info['ds[midterm].last_ds'],
-					$rrd_info['ds[longterm].last_ds']);
+				foreach (array('ds[shortterm].last_ds', 'ds[midterm].last_ds', 'ds[longterm].last_ds') as $info) {
+					$class = '';
+					if ($cores > 0 && $rrd_info[$info] > $cores * 2)
+						$class = ' class="crit"';
+					elseif ($cores > 0 && $rrd_info[$info] > $cores)
+						$class = ' class="warn"';
+
+					printf('<td%s>%.2f</td>', $class, $rrd_info[$info]);
+				}
 			}
 		}
 
diff --git a/layout/style.css b/layout/style.css
index a828a8d..3d5c94b 100644
--- a/layout/style.css
+++ b/layout/style.css
@@ -138,3 +138,14 @@ legend {
 	font-size: 1.4em;
 	font-weight: normal;
 }
+
+.warn {
+	color: darkorange;
+	font-weight: normal;
+	text-shadow: 0 0 1px darkorange;
+}
+.crit {
+	color: red;
+	font-weight: normal;
+	text-shadow: 0 0 1px red;
+}
-- 
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