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Date: Sat, 12 Sep 2009 13:07:37 +0200 From: Arjan van de Ven <arjan@...radead.org> To: linux-kernel@...r.kernel.org Cc: mingo@...e.hu, fweisbec@...il.com, peterz@...radead.org Subject: [patch 0/8] Introducing the "timechart" tool [note: since this is a visualization tool, and lkml doesn't like html email, it's probably better to read the online version at http://blog.fenrus.org/?p=5 in which I also show screenshots of the tool. The following text is the first part of the online introduction] Finding out why your Linux computer performs the way it does has been a hard task. Sure, there is Oprofile, and even ‘perf’ in recent kernels. There is LatencyTOP to find out where latencies happen. But all of these tools are rather limited when the software stack that has the performance issue is more complex than a single program. The tool that comes closest to being useful is `bootchart‘, but that has a rather limited resolution. To solve this, I have been working on a new tool, called Timechart, that has the objective to show on a system level what is going on, at various levels of detail. In fact. one of the design ideas behind timechart is that the output should be “infinitely zoomable”; that is, if you want to know more details about something, you should be able to zoom in to get these details. The rest of this blog post describes some aspects of timechart, using real life examples and screenshots. However, it is really hard to show the power of timechart on such a static page, to get a real feeling of what timechart can show you really ought to try it out yourself..... I'm still looking for a better name for the tool, so if you have any ideas please let me know... -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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