Subject: Re: your mail
To: None <>
From: Thor Lancelot Simon <>
List: current-users
Date: 08/27/2000 19:21:21
On Sun, Aug 27, 2000 at 12:36:07PM -0700, Matthew Jacob wrote:
> > BTW, tagged queuing on IDE will increase the interrupt load and IDE command
> > latency significantly, I'm not sure it will increase the overall performances
> > in all cases :)
> That's always the case. 

I don't agree.  The IDE controller is much more analogous to a completely
stupid SCSI adapter that requires host intervention every time it does
*anything* with any command.  It's the problem that the hardware doesn't
have a local, managed queue of commands that makes the interrupt and latency
problems so severe.