Messages in this thread | | | Date | Fri, 24 Mar 2000 15:01:20 +0100 | From | Harald Koenig <> | Subject | Re: VIA MVP3 gives bad IDE UDMA33 performace ?! |
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On Mar 24, Harald Koenig wrote:
> Hi, > > is there any chance to get better IDE performace for VIA MVP3 chipset ?
update with some more data & new questions. `lspci -s7.1 -xxxvv' shows
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586 IDE [Apollo] (rev 06) (prog-if 8a [Master SecP PriP]) Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- Latency: 64 set Region 4: I/O ports at d000 [size=16] 00: 06 11 71 05 07 00 80 02 06 8a 01 01 00 40 00 00 10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20: 01 d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40: 0a e2 09 16 68 13 e0 00 a8 a8 a8 21 ff 00 ff ff 50: 03 03 03 e2 00 00 00 00 a8 a8 a8 a8 00 00 00 00 60: 00 02 00 00 00 00 00 00 00 02 00 00 00 00 00 00 70: 02 00 00 00 00 00 00 00 82 00 00 00 00 00 00 00 80: 00 20 2f 01 00 00 00 00 00 00 00 00 00 00 00 00 90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 d0: 06 00 71 05 00 00 00 00 00 00 00 00 00 00 00 00 e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
and I wonder why offset 0x53 is set to 0xe2.
according to the PDF data sheet bit 0x20 set seems to indicae `UDMA33 PIO mode' instead of `UDMA33 DMA mode' which seems to be what I'd like to use ?! how can I clear this bit ? it's specified to be `read-only', so how do I disable PIO and enable DMA ? or is this the wrong way to go ???
lower nibble of 0x53 seems to force `cycle time' to 4T while your setup example in ide/via82cxxx.c seems to suggest that this should be 2T (0x0).
I'm using plain standard 33 MHz PCI, so I'd guess that 2T should be correct ?!
I tried to change register 0x53 to 0xe1 and 0xe0 and 0x62..0x60, but this didn't make any difference :-(
thanks for hint...
> > I'm using a 40GB 7200rpm Maxtor disk which can deliver ~28 MB/sec, > but with my main board (DFI K6BV3+) I only get ~13-16 MB/sec :-( > > here is some information from kernel 2.3.51 startup and hdparm: > > Uniform Multi-Platform E-IDE driver Revision: 6.30 > VP_IDE: IDE controller on PCI bus 00 dev 39 > VP_IDE: not 100% native mode: will probe irqs later > VT 82C598 Apollo MVP3 Chipset Core ATA-33 > Split FIFO Configuration: 16 Primary buffers, threshold = 3/4 > 0 Second. buffers, threshold = 1/2 > ide0: BM-DMA at 0xd000-0xd007, BIOS settings: hda:DMA, hdb:DMA > ide0: VIA Bus-Master (U)DMA Timing Config Success > hda: Maxtor 54098U8, ATA DISK drive > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14 > hda: Maxtor 54098U8, 39082MB w/2048kB Cache, CHS=79406/16/63, (U)DMA > Partition check: > hda: [EZD] [remap 0->1] [4982/255/63] hda1 > > > # hdparm -I /dev/hda > > /dev/hda: > > Model=aMtxro5 04898U , FwRev=AD26C00Q, SerialNo=8K30NECK > Config={ Fixed } > RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57 > BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16, MultSect=off > DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0 > CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=80041248 > tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2 > IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4 > UDMA modes: mode0 mode1 *mode2 mode3 mode4 > > > > I've tried 'hdparm -m8 /dev/hda' and similar to change `MultSect=off' > but this doesn't make any difference. > > I'll attach a small PS file which shows transfer rates for the whole 40GB > (position in MB vs. MB/sec) with both UDMA33 (my board) and UDMA66 > (K7 system from a friend). > > as you can see, my UDMA33 system gives exactly half the performace > for the outermost cylinders and surprisingly I get the same transfer > as UDMA66 only for the very innermost cylinders! there both PCs > give ~16.5 MB/sec. > > > any idea/hint/suggestion what I can try to get better transfer rate > with my main board ? > > > btw: transfer rate is the same for clean 2.2.14 and 2.3.47/2.3.51 kernels. > > > thanks for any hint, > > Harald > -- > All SCSI disks will from now on ___ _____ > be required to send an email notice 0--,| /OOOOOOO\ > 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ > \ \/OOOOOOOOOOOOOOO\ > \ OOOOOOOOOOOOOOOOO|// > Harald Koenig, \/\/\/\/\/\/\/\/\/ > Inst.f.Theoret.Astrophysik // / \\ \ > koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
Harald -- All SCSI disks will from now on ___ _____ be required to send an email notice 0--,| /OOOOOOO\ 24 hours prior to complete hardware failure! <_/ / /OOOOOOOOOOO\ \ \/OOOOOOOOOOOOOOO\ \ OOOOOOOOOOOOOOOOO|// Harald Koenig, \/\/\/\/\/\/\/\/\/ Inst.f.Theoret.Astrophysik // / \\ \ koenig@tat.physik.uni-tuebingen.de ^^^^^ ^^^^^
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