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103 wiersze
4.8 KiB
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<!-- received="Fri Jul 2 19:50:29 1999 PDT" -->
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<!-- sent="Fri, 2 Jul 1999 20:49:55 -0600 (MDT)" -->
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<!-- name="aanderson =" -->
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<!-- email="aanderson3@uswest.net" -->
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<!-- subject="Re: mustek aha1520B problems" -->
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<!-- id="m110FsJ-000Ka1C@bois.uswest.net" -->
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<!-- inreplyto="mustek aha1520B problems" -->
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<title>sane-devel: Re: mustek aha1520B problems</title>
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<h1>Re: mustek aha1520B problems</h1>
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<b>aanderson =</b> (<a href="mailto:aanderson3@uswest.net"><i>aanderson3@uswest.net</i></a>)<br>
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<i>Fri, 2 Jul 1999 20:49:55 -0600 (MDT)</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#10">[ date ]</a><a href="index.html#10">[ thread ]</a><a href="subject.html#10">[ subject ]</a><a href="author.html#10">[ author ]</a>
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<li> <b>Next message:</b> <a href="0011.html">Brian B.: "Re: Artec AT6 yet again"</a>
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<li> <b>Previous message:</b> <a href="0009.html">Douglas Gilbert: "Re: mustek aha1520B problems"</a>
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<li> <b>Maybe in reply to:</b> <a href="0006.html">aanderson =: "mustek aha1520B problems"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0038.html">Douglas Gilbert: "Re: mustek aha1520B problems"</a>
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</ul>
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<!-- body="start" -->
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<i>>Douglas Gilbert <<a href="mailto:dgilbert@interlog.com">dgilbert@interlog.com</a>> responded:</i><br>
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<i>></i><br>
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<i>>Did the bigger buffers improve performance and lessen</i><br>
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<i>>the following problems?</i><br>
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<i>> </i><br>
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<p>
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To be honest I didn't see any difference, which is why I think <br>
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think there are problems with the driver. The performance wasnt<br>
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bad in either case, tho, except for the hangups and crashes, the<br>
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latter of which typically occurred on large scans where improvement<br>
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might have been more apparent. I was careful to get the buffer logistics<br>
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right, altho I am suspicious that it seemed to crash more often with<br>
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the large buffers..<br>
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<p>
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<i>></i><br>
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<i>>My advansys 5140 (ISA aha1540 clone) slows anything else on the</i><br>
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<i>>same SCSI bus cause my UMAX 1220S doesn't support 'disconnects',</i><br>
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<i>>but the rest of my system goes ok (eg my advansys 940UW with my</i><br>
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<i>>root file system on it).</i><br>
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<i>> </i><br>
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<p>
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Thanks.. that is the behavior I expected. I'm glad SANE isn't<br>
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supposed to behave the way I have been experiencing.<br>
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<p>
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<i>></i><br>
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<i>>Time taken to DMA/block_move data to and from the SCSI device</i><br>
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<i>>and any polling that the aha152x driver does will _not_</i><br>
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<i>>show on a command prefixed with "time ".</i><br>
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<i>></i><br>
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I assumed the polling should show up under 'sys', but that there<br>
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should still be lots of idle time between scsi commands. <br>
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What concerned me more was that it seemed to keep on polling even after <br>
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the scan stopped.<br>
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<i>></i><br>
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<i>>Does 'cat /proc/interrupts' show a reasonable count</i><br>
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<i>>of interrupts on the aha152x driver?</i><br>
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<i>></i><br>
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Excellent question, thanks. A scan of 1.2 Mb generated 298 interrupts<br>
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for 4500 b/interrupt, which seems reasonable for an 8k FIFO. So<br>
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that part seems ok.<br>
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<i>></i><br>
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<i>>Perhaps you could post that info/patch through to</i><br>
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<i>>the aha152x maintainer who is</i><br>
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<i>>Juergen Fischer <<a href="mailto:fischer@et-inf.fho-emden.de">fischer@et-inf.fho-emden.de</a>>.</i><br>
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<i>> </i><br>
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I was reluctant to post the patch until I satisfied myself there wasn't <br>
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something wrong with the configuration. The fact that that card had been<br>
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removed from the 2.2.10 driver is certainly suspicious, which seems<br>
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reinforced by the SANE behavior. He may be just the person to run this<br>
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by, tho, so I will do that.<br>
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<p>
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<i>> </i><br>
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<i>>Interesting SCSI version ...</i><br>
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<i>></i><br>
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That is what shows. The revision number is also earlier than that in<br>
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sane-mustek man page for what that's worth. ><br>
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<p>
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<p>
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From Al Anderson <br>
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_______________________________________________________<br>
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- Anything NOT worth doing..is NOT worth doing well! AA<br>
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_______________________________________________________<br>
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<p>
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<pre>
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--
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Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
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</pre>
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<!-- body="end" -->
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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="0011.html">Brian B.: "Re: Artec AT6 yet again"</a>
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<li> <b>Previous message:</b> <a href="0009.html">Douglas Gilbert: "Re: mustek aha1520B problems"</a>
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<li> <b>Maybe in reply to:</b> <a href="0006.html">aanderson =: "mustek aha1520B problems"</a>
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<!-- nextthread="start" -->
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<li> <b>Next in thread:</b> <a href="0038.html">Douglas Gilbert: "Re: mustek aha1520B problems"</a>
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<!-- reply="end" -->
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</ul>
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