From d21f4a765b82e4c02ff15bf730b0e1f0d68d5471 Mon Sep 17 00:00:00 2001
From: Pim van den Berg
Date: Tue, 24 Jun 2014 12:38:10 +0200
Subject: add percentile support to network traffic graphs

Set $CONFIG['percentile'] to a number and a XXth percentile line + legend
will be added to all network traffic (if_octets) graphs.

Closes #81
---
 type/GenericIO.class.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'type/GenericIO.class.php')

diff --git a/type/GenericIO.class.php b/type/GenericIO.class.php
index fac7034..a9d58cd 100644
--- a/type/GenericIO.class.php
+++ b/type/GenericIO.class.php
@@ -33,6 +33,8 @@ class Type_GenericIO extends Type_Base {
 					if ($i == 1)
 						$rrdgraph[] = sprintf('CDEF:avg_%s_neg=avg_%1$s_raw,%s%s,*', crc32hex($sources[$i]), $this->negative_io ? '-' : '', $this->scale);
 					$rrdgraph[] = sprintf('VDEF:tot_%1$s=avg_%1$s,TOTAL', crc32hex($sources[$i]));
+					if ($this->percentile)
+						$rrdgraph[] = sprintf('VDEF:pct_%1$s=avg_%1$s_raw,%2$s,PERCENT', crc32hex($sources[$i]), $this->percentile);
 					$i++;
 				}
 			}
@@ -66,6 +68,15 @@ class Type_GenericIO extends Type_Base {
 			$i++;
 		}
 		
+		if ($this->percentile) {
+			$rrdgraph[] = sprintf('"COMMENT: \l"');
+			foreach($sources as $source) {
+				$legend = empty($this->legend[$source]) ? $source : $this->legend[$source];
+				$rrdgraph[] = sprintf('"HRULE:pct_%s#%s:%sth Percentile %s"', crc32hex($source), $this->get_faded_color($this->colors[$source], '000000', 0.6), $this->percentile, $this->rrd_escape($legend));
+				$rrdgraph[] = sprintf('"GPRINT:pct_%s:%s\l"', crc32hex($source), $this->rrd_format);
+			}
+		}
+
 		return $rrdgraph;
 	}
 }
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