Date: Tue, 15 Mar 2005 06:44:11 -0700 From: Scott Long <scottl@samsco.org> To: Danny Braniss <danny@cs.huji.ac.il> Cc: scsi@freebsd.org Subject: Re: iSCSI initiator driver beta version, testers wanted Message-ID: <4236E6AB.1060405@samsco.org> In-Reply-To: <E1DB70V-0005xD-5c@cs1.cs.huji.ac.il> References: <E1DB70V-0005xD-5c@cs1.cs.huji.ac.il>
next in thread | previous in thread | raw e-mail | index | archive | help
Danny Braniss wrote: > things are looking much better 2day, got tag queuing to work, and now it's > much faster. > Q: how can the driver tell the cam to enable queing (ie: camcontrol tag 0:0:0 > -Nn), and case XPT_PATH_INQ: cpi->hba_inquiry = PI_TAG_ABLE > Q: is there a rule of thumb as to how many tag'ed? When you call cam_sim_alloc(), there are arguments for how many concurrent tagged and untagged transactions the driver can handle. I don't know how tags work in iscsi, so I can't say what a good number is here. Note that tag management is left completely up to the driver; CAM will tell you whether or not to use a tag for a particular CCB, but it's up to the driver to assign and track the tag number. > > thanks, > danny > PS: soon there will be a new beta, any news with the old one? > > Sorry, I haven't had much time to review the old one yet. Sounds like you're making really good progress, though. Scott
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4236E6AB.1060405>