On Wed, 3 Mar 1999, Mikhail Teterin wrote: > What's the chance the Adaptec-152x controller (aic0) will soon work > with 3.1-STABLE? > > It has pretty horrible performance problems on 2.2.8-STABLE, even when > using DMA: > > [...] > 4.4%Sys 91.9%Intr 3.7%User 0.0%Nice 0.0%Idl 4244 inact 204 pci irq9 > | | | | | | | | | | 5288 cache 105 aic0 > irq11 > ==++++++++++++++++++++++++++++++++++++++++++++++ 248 free 104 wdc0 > irq14 > [...] > > (which may, of course, be due to the poor design of the board) and > we were wondering if upgrading to 3.1-STABLE will help us in the > foreseeable future? > I am working on a driver for the 152x and other cards based on the aic6360/6260 chip, and actually making some progress. As to performance I would expect it to be pretty horrible even if I were to get DMA working. The problem is that the aic6360 chip is pretty primative, requireing the CPU to manage much of the SCSI bus signaling.
I would not use this type of card for disk if I could avoid it, and probably not for tape either, I have a scanner I plan to use with it. Brian Beattie | The only problem with beat...@aracnet.com | winning the rat race ... www.aracnet.com/~beattie | in the end you're still a rat To Unsubscribe: send mail to majord...@freebsd.org with "unsubscribe freebsd-current" in the body of the message
