Douglas Gilbert wrote:
> Doug,
> Since this thread "has gone beyond a usefull debate", allow me
> to divert it to a performance issue with this recent posting
> on the SANE newsgroup. Has anybody else noticed any performance
> degradation since the big changes started in the scsi subsystem
> (around lk 2.3.30)? [sg and the aic7xxx driver also figure in
> this report.]
>
> Doug Gilbert
>
> vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>
> Subject:
> speed of the the latest cvs (yesterday) and Kernel 2.3.46
> Date:
> Thu, 24 Feb 2000 22:27:06 +0100
> From:
> Rene Rebe <[EMAIL PROTECTED]>
> Reply-To:
> [EMAIL PROTECTED]
>
> Hi, out there!
>
> /* I had to resend this, because I was subscribt with my old eMail-adr
> ... I hope it will only apear once ;-) */
>
> Because of the major improvements of the generic scsi interface in the
> 2.3 kernel series (I thought there are some ...) I updated my server
> to the 2.3.46 Kernel and recompiled sane (yesterday-cvs).
>
> I wanted to make some benchmarks for my avision-backend web-page and
> noticed that this new combination is MUCH SLOWER!
>
> The Avision is connected to an Adaptec AHA-2940-U with pentium 120.
>
> With 2.2.12 and a end-january-cvs an a4 - 400dpi - color scan took
> 180s.
>
> With 2.2.46 and the yesterday-cvs the same scan took 236s! Which is
> 56s (31%) slower ...!
>
> Does anyone has the same problem?? Or maybe know what could be wrong??
>
> (I hope the english is "readable"...)
>
> k33p h4ck1n6 Ren�
I haven't done enough with the 2.3 kernel to know for sure. But, I do know
that the report you give here has too many variables to be usefull. You need
to narrow down the issues somewhat. For example, you need to be running the
same version of sane under both versions of the kernel or else we can't rule
out that maybe the yesterday-cvs version of sane is slow.
--
Doug Ledford <[EMAIL PROTECTED]> http://people.redhat.com/dledford
Please check my web site for aic7xxx updates/answers before
e-mailing me about problems
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