Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 9 Feb 2001 16:12:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 9 Feb 2001 16:12:47 -0500 Received: from smtppop1pub.gte.net ([206.46.170.20]:8999 "EHLO smtppop1pub.verizon.net") by vger.kernel.org with ESMTP id ; Fri, 9 Feb 2001 16:12:27 -0500 Message-ID: <3A845D33.93A48B25@gte.net> Date: Fri, 09 Feb 2001 16:12:19 -0500 From: Stephen Clark Reply-To: sclark46@gte.net Organization: Paradigm 4 X-Mailer: Mozilla 4.76 [en] (WinNT; U) X-Accept-Language: en MIME-Version: 1.0 To: linux kernel Subject: VIA DMA slowdown Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Anybody else experience a DMA slowdown going from stock 2.4.1 to either 2.4.2pre2 or 2.4.1ac8. My hdparm -t numbers dropped from 15mb+ to around 10mb. Linux version 2.4.1-ac8 (root@pc-sec.paradigm4.com) (gcc version egcs-2.91.66 19990314/Linux (egcs-1.1.2 release)) #9 Fri Feb 9 15:41:34 EST 2001 BIOS-provided physical RAM map: BIOS-e820: 000000000009fc00 @ 0000000000000000 (usable) BIOS-e820: 0000000000000400 @ 000000000009fc00 (usable) BIOS-e820: 0000000000010000 @ 00000000000f0000 (reserved) BIOS-e820: 0000000000010000 @ 00000000ffff0000 (reserved) BIOS-e820: 0000000007ef0000 @ 0000000000100000 (usable) BIOS-e820: 000000000000d000 @ 0000000007ff3000 (ACPI data) BIOS-e820: 0000000000003000 @ 0000000007ff0000 (ACPI NVS) On node 0 totalpages: 32752 zone(0): 4096 pages. zone(1): 28656 pages. zone(2): 0 pages. Kernel command line: auto BOOT_IMAGE=l-2.4.1ac8 ro root=302 Initializing CPU#0 Detected 501.149 MHz processor. Console: colour VGA+ 80x25 Calibrating delay loop... 999.42 BogoMIPS Memory: 126136k/131008k available (1339k kernel code, 4484k reserved, 508k data, 224k init, 0k highmem) Dentry-cache hash table entries: 16384 (order: 5, 131072 bytes) Buffer-cache hash table entries: 4096 (order: 2, 16384 bytes) Page-cache hash table entries: 32768 (order: 5, 131072 bytes) Inode-cache hash table entries: 8192 (order: 4, 65536 bytes) VFS: Diskquotas version dquot_6.5.0 initialized CPU: Before vendor init, caps: 008021bf 808029bf 00000000, vendor = 2 CPU: L1 I Cache: 32K (32 bytes/line), D cache 32K (32 bytes/line) CPU: After vendor init, caps: 008021bf 808029bf 00000000 00000002 CPU: After generic, caps: 008021bf 808029bf 00000000 00000002 CPU: Common caps: 008021bf 808029bf 00000000 00000002 CPU: AMD-K6(tm) 3D processor stepping 0c Checking 'hlt' instruction... OK. POSIX conformance testing by UNIFIX mtrr: v1.37 (20001109) Richard Gooch (rgooch@atnf.csiro.au) mtrr: detected mtrr type: AMD K6 PCI: PCI BIOS revision 2.10 entry at 0xfb270, last bus=1 PCI: Using configuration type 1 PCI: Probing PCI hardware PCI: Using IRQ router VIA [1106/0586] at 00:07.0 Activating ISA DMA hang workarounds. isapnp: Scanning for Pnp cards... isapnp: Calling quirk for 01:00 isapnp: SB audio device quirk - increasing port range isapnp: Calling quirk for 01:02 isapnp: AWE32 quirk - adding two ports isapnp: Card 'Creative SB AWE64 PnP' isapnp: 1 Plug & Play card detected total Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd v1.8 parport0: PC-style at 0x378 [PCSPP(,...)] pty: 256 Unix98 ptys configured lp0: using parport0 (polling). block: queued sectors max/low 83773kB/27924kB, 256 slots per queue loop: enabling 8 loop devices Uniform Multi-Platform E-IDE driver Revision: 6.31 ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: IDE controller on PCI bus 00 dev 39 VP_IDE: chipset revision 6 VP_IDE: not 100% native mode: will probe irqs later ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx VP_IDE: VIA vt82c586b (rev 47) IDE UDMA33 controller on pci00:07.1 ide0: BM-DMA at 0xe000-0xe007, BIOS settings: hda:DMA, hdb:DMA ide1: BM-DMA at 0xe008-0xe00f, BIOS settings: hdc:DMA, hdd:DMA hda: WDC WD102AA, ATA DISK drive hdb: FX120T, ATAPI CD/DVD-ROM drive ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 hda: 20044080 sectors (10263 MB) w/2048KiB Cache, CHS=1247/255/63, UDMA(33) hdb: ATAPI 12X CD-ROM drive, 256kB Cache, DMA Uniform CD-ROM driver Revision: 3.12 Partition check: hda: hda1 hda2 hda3 hda4 Floppy drive(s): fd0 is 1.44M FDC 0 is a post-1991 82077 udf: registering filesystem Serial driver version 5.02 (2000-08-09) with MANY_PORTS SHARE_IRQ SERIAL_PCI ISAPNP enabled ttyS00 at 0x03f8 (irq = 4) is a 16550A ttyS01 at 0x02f8 (irq = 3) is a 16550A Real Time Clock Driver v1.10d Linux Tulip driver version 0.9.13b (January 24, 2001) PCI: Found IRQ 12 for device 00:09.0 eth0: ADMtek Comet rev 17 at 0xe800, 00:20:78:06:94:8E, IRQ 12. Universal TUN/TAP device driver 1.3 (C)1999-2000 Maxim Krasnyansky SCSI subsystem driver Revision: 1.00 Configuring Adaptec (SCSI-ID 7) at IO:330, IRQ 11, DMA priority 5 scsi0 : Adaptec 1542 scsi1 : SCSI host adapter emulation for IDE ATAPI devices NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP IP: routing cache hash table of 512 buckets, 4Kbytes TCP: Hash tables configured (established 8192 bind 8192) NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. ACPI: Core Subsystem version [20010125] ACPI: Subsystem enabled ACPI: System firmware supports: C2 C3 ACPI: System firmware supports: S0 S1 S4 S5 VFS: Mounted root (ext2 filesystem) readonly. Freeing unused kernel memory: 224k freed Adding Swap: 72284k swap-space (priority -1) Adding Swap: 65528k swap-space (priority -2) Adding Swap: 65528k swap-space (priority -3) [root@pc-sec /root]# hdparm -tT /dev/hda /dev/hda: Timing buffer-cache reads: 128 MB in 2.45 seconds = 52.24 MB/sec Timing buffered disk reads: 64 MB in 6.65 seconds = 9.62 MB/sec Any ideas? Steve - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/