Messages in this thread | | | Date | Mon, 29 Dec 2003 20:49:07 -0500 (EST) | From | Thomas Molina <> | Subject | Re: 2.6.0 performance problems |
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On Tue, 30 Dec 2003, Martin Schlemmer wrote:
> > It's not uncommon for a laptop to have a hard disk which supports > > higher DMA modes than what the IDE chipset supports. > > My aging Intel 440BX based VAIO has a disk in the same configuration > > as yours, supports udma4, but chipset only goes up to udma2. > > > > Right, or as somebody else pointed out, it might not be a 80-pin cable. > > Lets rephrase - does it also run in udma2 mode with 2.4 ? And did > you check readahead? In 2.6 it seems that a bigger value is better - > I for instance have to set it to 8192 to have the same performance as > in 2.4 ...
8192 will be my next test. I'm doing a compile at the moment. It runs in udma2 under both 2.4 and 2.6. If I need an 80-pin cable then udma4 is not possible for this system. If I read the following, it is only capable of 66MHz anyway:
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE (rev 10) (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 Region 4: I/O ports at 1420 [size=16] Capabilities: [c0] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0-,D1-,D2-,D3hot-,D3cold-) Status: D0 PME-Enable- DSel=0 DScale=0 PME-
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