Date: Mon, 27 Sep 1999 16:39:16 -0600 (MDT) From: "Justin T. Gibbs" <gibbs@narnia.plutotech.com> To: Gerard Roudier <groudier@club-internet.fr> Cc: scsi@FreeBSD.org Subject: Re: sym driver 0.3.0 Message-ID: <199909272239.QAA12387@narnia.plutotech.com> In-Reply-To: <Pine.LNX.3.95.990928003959.429A-100000@localhost>
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In article <Pine.LNX.3.95.990928003959.429A-100000@localhost> you wrote: > > > On Mon, 27 Sep 1999, Kenneth D. Merry wrote: > >> ccd0 da0 da1 da2 >> KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s KB/t tps MB/s >> 8.00 994 7.76 8.00 49 0.38 8.00 521 4.07 8.00 472 3.69 >> 8.00 1010 7.89 0.00 0 0.00 8.00 487 3.81 8.00 523 4.08 >> 8.00 1012 7.91 0.00 0 0.00 8.00 489 3.82 8.00 523 4.08 > > This sym_hipd driver can perform at least 5 times the above number of 8K > transactions per second on 1 LVD BUS given appropriate hard disks (even if > reselections are used). So, such a poor testing is inappropriate for the > sym_hipd driver that would absolutely not be the bottleneck. It is a non-sequential load where we are seek bound, so perhaps the system or drive or driver is behaving in ways that you don't expect. I certainly find it puzzling that the ncr driver handles this non-sequential load faster than the sim_hipd driver since I know that your driver's architecture is superior. I could run some SCSI bus traces if these would be helpful. -- Justin To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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