modules/admin-full: implement load graph

1 files changed, 293 insertions, 0 deletions

diff --git a/modules/admin-full/luasrc/view/admin_status/load.htm b/modules/admin-full/luasrc/view/admin_status/load.htm
new file mode 100644
index 0000000000..5e21714d8f
--- /dev/null
+++ b/modules/admin-full/luasrc/view/admin_status/load.htm
@@ -0,0 +1,293 @@
+<%#
+LuCI - Lua Configuration Interface
+Copyright 2010 Jo-Philipp Wich <xm@subsignal.org>
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+$Id$
+
+-%>
+
+<%+header%>
+
+<script type="text/javascript" src="<%=resource%>/cbi.js"></script>
+<script type="text/javascript">//<![CDATA[
+	var bwxhr = new XHR();
+
+	var G;
+	var TIME = 0;
+	var L01   = 1;
+	var L05   = 2;
+	var L15  = 3;
+
+	var width  = 760;
+	var height = 300;
+	var step   = 5;
+
+	var data_wanted = Math.floor(width / step);
+	var data_fill   = 0;
+	var data_stamp  = 0;
+
+	var data_01  = [ ];
+	var data_05  = [ ];
+	var data_15 = [ ];
+
+	var line_01;
+	var line_05;
+	var line_15;
+
+	var label_25;
+	var label_050;
+	var label_75;
+
+	var label_01_cur;
+	var label_01_avg;
+	var label_01_peak;
+
+	var label_05_cur;
+	var label_05_avg;
+	var label_05_peak;
+
+	var label_15_cur;
+	var label_15_avg;
+	var label_15_peak;
+
+	var label_scale;
+
+
+	function update_graph()
+	{
+		bwxhr.get('<%=build_url("admin/status/load_status")%>', null,
+			function(x, data)
+			{
+				var data_max   = 0;
+				var data_scale = 0;
+
+				var data_01_avg = 0;
+				var data_05_avg = 0;
+				var data_15_avg = 0;
+
+				var data_01_peak = 0;
+				var data_05_peak = 0;
+				var data_15_peak = 0;
+
+				for (var i = data_stamp ? 0 : 1; i < data.length; i++)
+				{
+					/* skip overlapping entries */
+					if (data[i][TIME] <= data_stamp)
+						continue;
+
+					data_01.push(data[i][L01]);
+					data_05.push(data[i][L05]);
+					data_15.push(data[i][L15]);
+				}
+
+				/* cut off outdated entries */
+				data_01 = data_01.slice(data_01.length - data_wanted, data_01.length);
+				data_05 = data_05.slice(data_05.length - data_wanted, data_05.length);
+				data_15 = data_15.slice(data_15.length - data_wanted, data_15.length);
+
+				/* find peak */
+				for (var i = 0; i < data_01.length; i++)
+				{
+					data_max = Math.max(data_max, data_01[i]);
+					data_max = Math.max(data_max, data_05[i]);
+					data_max = Math.max(data_max, data_15[i]);
+
+					data_01_peak = Math.max(data_01_peak, data_01[i]);
+					data_05_peak = Math.max(data_05_peak, data_05[i]);
+					data_15_peak = Math.max(data_15_peak, data_15[i]);
+
+					if (i > 0)
+					{
+						data_01_avg = (data_01_avg + data_01[i]) / 2;
+						data_05_avg = (data_05_avg + data_05[i]) / 2;
+						data_15_avg = (data_15_avg + data_15[i]) / 2;
+					}
+					else
+					{
+						data_01_avg = data_01[i];
+						data_05_avg = data_05[i];
+						data_15_avg = data_15[i];
+					}
+				}
+
+				/* remember current timestamp, calculate horizontal scale */
+				data_stamp = data[data.length-1][TIME];
+				data_scale = height / (data_max * 1.1);
+
+
+				/* plot data */
+				var pt_01 = '0,' + height;
+				var pt_05 = '0,' + height;
+				var pt_15 = '0,' + height;
+
+				var y_01 = 0;
+				var y_05 = 0;
+				var y_15 = 0;
+
+				for (var i = 0; i < data_01.length; i++)
+				{
+					var x = i * step;
+
+					y_01 = height - Math.floor(data_01[i] * data_scale);
+					y_05 = height - Math.floor(data_05[i] * data_scale);
+					y_15 = height - Math.floor(data_15[i] * data_scale);
+
+					pt_01 += ' ' + x + ',' + y_01;
+					pt_05 += ' ' + x + ',' + y_05;
+					pt_15 += ' ' + x + ',' + y_15;
+				}
+
+				pt_01 += ' ' + width + ',' + y_01 + ' ' + width + ',' + height;
+				pt_05 += ' ' + width + ',' + y_05 + ' ' + width + ',' + height;
+				pt_15 += ' ' + width + ',' + y_15 + ' ' + width + ',' + height;
+
+
+				line_01.setAttribute('points', pt_01);
+				line_05.setAttribute('points', pt_05);
+				line_15.setAttribute('points', pt_15);
+
+				label_25.firstChild.data = (1.1 * 0.25 * data_max / 100).toFixed(2);
+				label_50.firstChild.data = (1.1 * 0.50 * data_max / 100).toFixed(2);
+				label_75.firstChild.data = (1.1 * 0.75 * data_max / 100).toFixed(2);
+
+				label_01_cur.innerHTML = (data_01[data_01.length-1] / 100).toFixed(2);
+				label_05_cur.innerHTML = (data_05[data_05.length-1] / 100).toFixed(2);
+				label_15_cur.innerHTML = (data_01[data_15.length-1] / 100).toFixed(2);
+
+				label_01_avg.innerHTML = (data_01_avg / 100).toFixed(2);
+				label_05_avg.innerHTML = (data_05_avg / 100).toFixed(2);
+				label_15_avg.innerHTML = (data_15_avg / 100).toFixed(2);
+
+				label_01_peak.innerHTML = (data_01_peak / 100).toFixed(2);
+				label_05_peak.innerHTML = (data_05_peak / 100).toFixed(2);
+				label_15_peak.innerHTML = (data_15_peak / 100).toFixed(2);
+
+				/* reset timer */
+				window.setTimeout(update_graph, 1000);
+			}
+		)
+	}
+
+	/* wait for SVG */
+	window.setTimeout(
+		function() {
+			G = document.embeds["bwsvg"].getSVGDocument();
+
+			if (!G)
+			{
+				window.setTimeout(arguments.callee, 1000);
+			}
+			else
+			{
+				/* find sizes */
+				width       = document.embeds["bwsvg"].offsetWidth  - 2;
+				height      = document.embeds["bwsvg"].offsetHeight - 2;
+				data_wanted = Math.ceil(width / step);
+
+				/* prefill datasets */
+				for (var i = 0; i < data_wanted; i++)
+				{
+					data_01[i] = 0;
+					data_05[i] = 0;
+					data_15[i] = 0;
+				}
+
+				/* find svg elements */
+				line_01 = G.getElementById('load01');
+				line_05 = G.getElementById('load05');
+				line_15 = G.getElementById('load15');
+
+				label_25 = G.getElementById('label_25');
+				label_50 = G.getElementById('label_50');
+				label_75 = G.getElementById('label_75');
+
+				label_01_cur  = document.getElementById('lb_load01_cur');
+				label_01_avg  = document.getElementById('lb_load01_avg');
+				label_01_peak = document.getElementById('lb_load01_peak');
+
+				label_05_cur  = document.getElementById('lb_load05_cur');
+				label_05_avg  = document.getElementById('lb_load05_avg');
+				label_05_peak = document.getElementById('lb_load05_peak');
+
+				label_15_cur  = document.getElementById('lb_load15_cur');
+				label_15_avg  = document.getElementById('lb_load15_avg');
+				label_15_peak = document.getElementById('lb_load15_peak');
+
+				label_scale   = document.getElementById('scale');
+
+
+				/* plot horizontal time interval lines */
+				for (var i = step * 60; i < width; i += step * 60)
+				{
+					var line = G.createElementNS('http://www.w3.org/2000/svg', 'line');
+						line.setAttribute('x1', i);
+						line.setAttribute('y1', 0);
+						line.setAttribute('x2', i);
+						line.setAttribute('y2', '100%');
+						line.setAttribute('style', 'stroke:black;stroke-width:0.1');
+
+					var text = G.createElementNS('http://www.w3.org/2000/svg', 'text');
+						text.setAttribute('x', i + 5);
+						text.setAttribute('y', 15);
+						text.setAttribute('style', 'fill:#999999; font-size:9pt');
+						text.appendChild(G.createTextNode(Math.round(i / step / 60) + 'm'));
+
+					label_25.parentNode.appendChild(line);
+					label_25.parentNode.appendChild(text);
+				}
+
+				label_scale.innerHTML = String.format('<%:(%d minute window, %d second interval)%>', data_wanted / 60, 1);
+
+				/* render datasets, start update interval */
+				update_graph();
+			}
+		}, 1000
+	);
+//]]></script>
+
+<h2><a id="content" name="content"><%:Realtime Load%></a></h2>
+
+<embed id="bwsvg" style="width:100%; height:300px; border:1px solid #000000; background-color:#FFFFFF" src="<%=resource%>/load.svg" />
+<div style="text-align:right"><small id="scale">-</small></div>
+<br />
+
+<table style="width:100%; table-layout:fixed" cellspacing="5">
+	<tr>
+		<td style="text-align:right; vertical-align:top"><strong style="border-bottom:2px solid #ff0000"><%:1 Minute Load:%></strong></td>
+		<td id="lb_load01_cur">0</td>
+
+		<td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
+		<td id="lb_load01_avg">0</td>
+
+		<td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
+		<td id="lb_load01_peak">0</td>
+	</tr>
+	<tr>
+		<td style="text-align:right; vertical-align:top"><strong style="border-bottom:2px solid #ff6600"><%:5 Minute Load:%></strong></td>
+		<td id="lb_load05_cur">0</td>
+
+		<td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
+		<td id="lb_load05_avg">0</td>
+
+		<td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
+		<td id="lb_load05_peak">0</td>
+	</tr>
+	<tr>
+		<td style="text-align:right; vertical-align:top"><strong style="border-bottom:2px solid #ffaa00"><%:15 Minute Load:%></strong></td>
+		<td id="lb_load15_cur">0</td>
+
+		<td style="text-align:right; vertical-align:top"><strong><%:Average:%></strong></td>
+		<td id="lb_load15_avg">0</td>
+
+		<td style="text-align:right; vertical-align:top"><strong><%:Peak:%></strong></td>
+		<td id="lb_load15_peak">0</td>
+	</tr>
+</table>
+
+<%+footer%>