Martino FerrariandClaude Sonnet 4.6
328588a8b9
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
73 lines
4.0 KiB
Plaintext
73 lines
4.0 KiB
Plaintext
<page xmlns="http://projectmallard.org/1.0/"
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type="topic" style="task"
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id="status">
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<info>
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<link type="guide" xref="index#output"/>
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<desc>The status bar's two tiers, the activity badge, the fixed state words, and the ⓘ
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detail popover.</desc>
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<credit type="author copyright">
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<name>Martino Ferrari</name>
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</credit>
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</info>
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<title>Status bar and diagnostics</title>
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<p>The status bar is two tiers. The bar itself is one glance line — the state, the rate and
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the window — and everything else is behind the ⓘ button at its right-hand end.</p>
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<section id="reach">
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<title>How to reach it</title>
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<p>The bar is always visible at the foot of the window, under the badge bar. Click <gui>ⓘ</gui> for the detail popover.</p>
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</section>
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<section id="knowing">
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<title>Worth knowing</title>
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<list>
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<item><p>The badge is one glyph in four colours: green <em>alternating</em> lit and dim
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means data is arriving, and a steady colour means it is not. A badge that never blinks is
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not a working badge. Of the two steady colours, <em>grey</em> is no stream at all or a
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pipeline you stopped (the tooltip says which), and <em>yellow</em> is a source that
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answered but has sent no configuration.</p></item>
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<item><p>The state field is one word from a fixed set: <code>connecting</code>,
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<code>live</code>, <code>paused</code>, <code>armed</code>, <code>capturing</code>,
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<code>event held</code>, <code>disarmed</code>. Two states add one field each: in trigger
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mode, how long ago the last event was; while paused, how long you have been paused.</p></item>
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<item><p><code>connecting</code> means there is no <em>signal list</em> yet — either no
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session or a session with no configuration behind it. Every other word claims a signal
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list, so until one arrives there is nothing for them to describe: nothing can be enabled
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and no data is owed.</p></item>
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<item><p>The paused figure is <em>wall</em> time, not stream time — the producer never
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stops while paused, so it answers "how long have I been looking at this picture".</p></item>
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<item><p>Nothing on the bar may change width with the stream, because the bar sits
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directly above the plot and a wider label would relayout it. That is why the rate
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collapses to one figure or a range rather than listing per channel, and why an elapsed
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time steps to a coarser unit instead of growing digits.</p></item>
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<item><p><code>gaps</code> counts packets the receiver knows it missed. It is the number
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that matters: a non-zero count means samples are absent from the buffer, not merely
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late.</p></item>
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<item><p><code>reconnects</code> counts sessions re-established with the source. Over
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unicast a climbing count usually means a second client is taking the source's single
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session.</p></item>
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<item><p>The starvation notice — <em>connected, but no data is arriving</em> — is that
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same situation seen from the other side: the signal list is here, so something took the
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stream away. A source that has sent <em>no</em> configuration gets a different notice,
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<em>trying to connect</em>, because nothing was taken away — pointing the app at a port
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where nothing answers is that case, and the usual cause is a streamer that is not running
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or is serving another port.</p></item>
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<item><p><code>stored</code> versus <code>wire</code> in the popover is the decimation.
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They differ exactly when the window is too long to store at full rate.</p></item>
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</list>
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</section>
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<section id="example">
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<title>Example</title>
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<p>The bar reads <code>● live · 10 kS/s · 2 s window</code>. Behind ⓘ:
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<code>Stream connected, configured / packets 717 · frames 716 · gaps 0 / 3 signals · 3
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channels</code>, <code>Buffer 200.0 MB · 1677 s span · time x1 / stored 10 kS/s (wire
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10 kS/s)</code>, <code>Plot 1 3 traces · 195000 samples</code>,
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<code>Reconnects 0</code>.</p>
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</section>
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</page>
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