kern/32338: Network to disk write performance low under ATA with DMA

David S. Madole david at madole.net
Wed Aug 25 14:30:20 PDT 2004


The following reply was made to PR kern/32338; it has been noted by GNATS.

From: "David S. Madole" <david at madole.net>
To: "Tilman Linneweh" <arved at FreeBSD.org>, <freebsd-bugs at FreeBSD.org>
Cc:  
Subject: Re: kern/32338: Network to disk write performance low under ATA with DMA
Date: Wed, 25 Aug 2004 17:05:00 -0400

 From: "Tilman Linneweh" <arved at FreeBSD.org>
 >
 > Synopsis: Network to disk write performance low under ATA with DMA
 >
 > State-Changed-From-To: open->feedback
 > State-Changed-By: arved
 > State-Changed-When: Wed Aug 25 20:45:41 GMT 2004
 > State-Changed-Why:
 > In the last two years several changes were committed to the sis driver.
 > Did you test with a recent version of FreeBSD if your problem is fixed?
 
 I don't know, as I no longer have a machine running day-to-day that is a
 good test case.
 
 After submitting this, I resigned to the fact that no one was interested,
 probably rightly so, as the driver is probably not the best place to fix
 what is really a BIOS PCI bus initialization issue, although there were
 other drivers, at the time at least, that did this, too.
 
 I maintained a local kernel patch for a little while, then realized it's
 really just as easy to do something like
 
      pciconf -w -b pci0:9:0 0xd 0x60
 
 if rc.local, and that's what I did for a long time. In the last few
 months I have upgraded the machine that was the test case for this and it
 now has an Intel NIC.
 
 David


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