Date: Thu, 24 Jan 2008 12:26:11 +0100 From: Kris Kennaway <kris@FreeBSD.org> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-performance@freebsd.org Subject: Re: Performance Tracker project update Message-ID: <479875D3.3020801@FreeBSD.org> In-Reply-To: <fn9rvg$cfr$1@ger.gmane.org> References: <4796C717.9000507@cederstrand.dk> <47972895.4050005@FreeBSD.org> <fn8lds$e63$1@ger.gmane.org> <47986848.7010602@cederstrand.dk> <47987141.3070606@FreeBSD.org> <fn9rvg$cfr$1@ger.gmane.org>
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Ivan Voras wrote: > Kris Kennaway wrote: >> Erik Cederstrand wrote: >>> Ivan Voras wrote: >>>> I have a suggestion to make the graphs more readable: if a long >>>> period was chosen by the user (e.g. > 100 days / plot points), don't >>>> plot points and error bars, plot a simple line through the points. >>>> Also, set all date strings on the X-axis to empty strings except for >>>> the dates on 1/10ths of the interval. >>> Noted. Thanks. >> Actually the error bars are quite important to see what is going on. >> Some of the metrics are very (too) noisy and if you only look at the >> data points they sometimes appear to have a signal when they don't. >> Ultimately that just means more data points should be taken per run for >> those metrics, but the error bars are the signal for this. > > Of course they are useful, but do we really need to see them when there > are hundreds of samples plotted 1 pixel apart? (As I've said: keep them > when when the user "zooms in" on an appropriate small number of > samples). But this is an aesthetics-oriented idea, functionality won't > be impaired either way so feel free to ignore it. I think so, yeah. Otherwise I'd waste time zooming in only to find the trends are measurement noise. Kris
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