Date: Wed, 26 Apr 2000 13:44:09 -0700 From: Kent Stewart <kstewart@3-cities.com> To: Dan Nelson <dnelson@emsphone.com> Cc: Matthew Dillon <dillon@apollo.backplane.com>, Narvi <narvi@haldjas.folklore.ee>, Michael Bacarella <mbac@nyct.net>, Alfred Perlstein <bright@wintelcom.net>, Kevin Day <toasty@dragondata.com>, hackers@FreeBSD.ORG Subject: Re: Double buffered cp(1) Message-ID: <39075519.B6085190@3-cities.com> References: <Pine.BSF.3.96.1000426165333.74116e-100000@haldjas.folklore.ee> <3907177C.5CFEC69A@3-cities.com> <200004261751.KAA96154@apollo.backplane.com> <39073655.56A70C00@3-cities.com> <20000426135111.A21368@dan.emsphone.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Dan Nelson wrote: > > In the last episode (Apr 26), Kent Stewart said: > > I just noticed that mine isn't showing "Tagged Queueing Enabled" is > > that something I can set? The adapter is an Adaptec 2940uw. > > > > da0 at ahc0 bus 0 target 4 lun 0 > > da0: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device > > da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit) > > da0: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C) > > The CAM code has a quirk entry for IBM DCAS drives that turns it off; > check out /sys/cam/cam_xpt.c, line 320. I suggest benchmarking with > and without the quirk entry, and if it's faster with tagged queueing, > update PR kern/10398. What would you suggest. Do you remove the entry or just change the tags field? It has mintags=0 and maxtags=0. The other entries have mintags=24 and maxtags=32. I 've have about 6 hours of buildworlds on it right now. Plus some other benchmarking. Kent > > -- > Dan Nelson > dnelson@emsphone.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-hackers" in the body of the message -- Kent Stewart Richland, WA mailto:kstewart@3-cities.com http://www.3-cities.com/~kstewart/index.html FreeBSD News http://daily.daemonnews.org/ SETI(Search for Extraterrestrial Intelligence) @ HOME http://setiathome.ssl.berkeley.edu/ Hunting Archibald Stewart, b 1802 in Ballymena, Antrim Co., NIR http://www.3-cities.com/~kstewart/genealogy/archibald_stewart.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?39075519.B6085190>