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<!-- received="Sat Oct 30 07:35:54 1999 PDT" -->
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<!-- sent="Sat, 30 Oct 1999 16:08:36 +0200" -->
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<!-- name="abel deuring" -->
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<!-- email="a.deuring@satzbau-gmbh.de" -->
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<!-- subject="Re: Mustek ScanExpress 6000SP" -->
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<title>sane-devel: Re: Mustek ScanExpress 6000SP</title>
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<h1>Re: Mustek ScanExpress 6000SP</h1>
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<b>abel deuring</b> (<a href="mailto:a.deuring@satzbau-gmbh.de"><i>a.deuring@satzbau-gmbh.de</i></a>)<br>
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<i>Sat, 30 Oct 1999 16:08:36 +0200</i>
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<p>
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<li> <b>Messages sorted by:</b> <a href="date.html#234">[ date ]</a><a href="index.html#234">[ thread ]</a><a href="subject.html#234">[ subject ]</a><a href="author.html#234">[ author ]</a>
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<li> <b>Next message:</b> <a href="0235.html">Jean-François Straeten: "GENIUS ColorPage-HR5 PRO ?"</a>
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<li> <b>Previous message:</b> <a href="0233.html">abel deuring: "Re: Mustek ScanExpress 6000SP"</a>
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<li> <b>Maybe in reply to:</b> <a href="0218.html">Ricardo Ferreira: "Mustek ScanExpress 6000SP"</a>
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<li> <b>Next in thread:</b> <a href="0237.html">Ricardo Ferreira: "Re: Mustek ScanExpress 6000SP"</a>
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abel deuring schrieb:<br>
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<p>
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[...]<br>
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<i>> If I understand the source code right, the backend should then queue two</i><br>
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<i>> resp. three read commands. This alone does not necessarily help, since</i><br>
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<i>> AFAIK the Linux kernels contain up to now the SG driver version 2.1.34,</i><br>
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<i>> and this SG version does not yet support "driver level" queueing. In</i><br>
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<i>> this case, the queueing logic is done within sanei_scsi.c, and this</i><br>
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<i>> means that the pipe might remain a bottleneck. Upgrading to SG version</i><br>
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<i>> 2.1.35 should help in this case. You can download the SG driver from</i><br>
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<i>> <a href="http://www.torque.net/sg/">http://www.torque.net/sg/</a></i><br>
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<p>
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One addition: If you want to check if low level command queueing is<br>
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enabled, set SANE_DEBUG_SANEI_SCSI to 1, and look to the output. If you<br>
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want to see if it is acutally used, set SANE_DEBUG_SANEI_SCSI to 10 and<br>
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look out for lines like "scsi_req_enter: queue_used: nn, queue_max: nn".<br>
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<p>
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Abel<br>
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<p>
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<pre>
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--
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</pre>
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0235.html">Jean-François Straeten: "GENIUS ColorPage-HR5 PRO ?"</a>
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<li> <b>Previous message:</b> <a href="0233.html">abel deuring: "Re: Mustek ScanExpress 6000SP"</a>
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<li> <b>Maybe in reply to:</b> <a href="0218.html">Ricardo Ferreira: "Mustek ScanExpress 6000SP"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0237.html">Ricardo Ferreira: "Re: Mustek ScanExpress 6000SP"</a>
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<!-- reply="end" -->
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</ul>
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