Re: slow latencies on IDE disk drives( controller? )

From: Andre Hedrick (andre@linux-ide.org)
Date: Tue Mar 27 2001 - 12:06:48 EST


#define PCI_VENDOR_ID_CONTAQ 0x1080
#define PCI_DEVICE_ID_CONTAQ_82C599 0x0600
#define PCI_DEVICE_ID_CONTAQ_82C693 0xc693

 * linux/drivers/block/cy82c693.c Version 0.34 Dec. 13, 1999
 *
 * Copyright (C) 1998-99 Andreas S. Krebs (akrebs@altavista.net), Maintainer
 * Copyright (C) 1998-99 Andre Hedrick, Integrater

 * Notes:
 * - I recently got a 16.8G IBM DTTA, so I was able to test it with
 * a large and fast disk - the results look great, so I'd say the
 * driver is working fine :-)
 * hdparm -t reports 8.17 MB/sec at about 6% CPU usage for the DTTA
 * - this is my first linux driver, so there's probably a lot of room
 * for optimizations and bug fixing, so feel free to do it.
 * - use idebus=xx parameter to set PCI bus speed - needed to calc
 * timings for PIO modes (default will be 40)
 * - if using PIO mode it's a good idea to set the PIO mode and
 * 32-bit I/O support (if possible), e.g. hdparm -p2 -c1 /dev/hda
 * - I had some problems with my IBM DHEA with PIO modes < 2
 * (lost interrupts) ?????
 * - first tests with DMA look okay, they seem to work, but there is a
 * problem with sound - the BusMaster IDE TimeOut should fixed this

This is your fix....

Andre Hedrick
Linux ATA Development
ASL Kernel Development
-----------------------------------------------------------------------------
ASL, Inc. Toll free: 1-877-ASL-3535
1757 Houret Court Fax: 1-408-941-2071
Milpitas, CA 95035 Web: www.aslab.com

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sat Mar 31 2001 - 21:00:16 EST