Messages in this thread | | | Date | Fri, 27 Nov 1998 01:43:32 -0600 (CST) | From | "Andre M. Hedrick" <> | Subject | Re: Absolutely horrid IDE performance... |
| |
On Wed, 25 Nov 1998, George wrote:
> On Tue, 24 Nov 1998, Brian Macy wrote: > > >On /dev/hda: > >hdparm gives 6.68meg/sec > >time dd if=/dev/hda of=/dev/null bs=4096 count=16384 gives well under > >1meg/sec (the more transfered the slower) > > I have the same drive and under DMA mode2 (HX chipset PIIX3) I get: > Timing buffered disk reads: 64 MB in 6.67 seconds = 9.60 MB/sec > Timing buffered disk reads: 64 MB in 7.15 seconds = 8.95 MB/sec > Timing buffered disk reads: 64 MB in 6.64 seconds = 9.64 MB/sec
Those are excellent throughput for DMA mode 2, IMHO.
> >/var/log/dmesg > >ide: i82371 PIIX (Triton) on PCI bus 0 function 57 > > ide0: BM-DMA at 0xffa0-0xffa7 > >hda: IBM-DTTA-371010, 9641MB w/465kB Cache, CHS=1024/255/63, UDMA > > PIIX3: IDE controller on PCI bus 00 dev 39 > PIIX3: not 100%% native mode: will probe irqs later > ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdc:pio, hdd:pio > hdc: IBM-DTTA-371010, 9641MB w/465kB Cache, CHS=19590/16/63, (U)DMA > > Except I don't use LBA and I'm not in UDMA mode and this is 2.1.129.
Be glad that your BIOS locks you out of UDMA with a PIIX3 HX board, or you would not be able to boot at all...........
The HX can decode UDMA but is to stupid to handle it, it is a true hardware problem by design. UDMA did not exist when PIIX3 was released.
> > Model=BI-MTDAT3-1710 0 , FwRev=7TO77AB0, SerialNo= > > Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs } > > RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34 > > BuffType=3(DualPortCache), BuffSize=465kB, MaxMultSect=16, MultSect=off > > DblWordIO=no, maxPIO=2(fast), DMA=yes, maxDMA=2(fast) > > CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=19746720
I see you have lost some sector counts between CHS and LBA...... LBAsects=19746720 CurSects=16514064 ----------------- 3232656 -------- 1.6G mis reported
> > tDMA={min:120,rec:120}, DMA modes: sword0 sword1 sword2 mword0 mword1 > >mword2 > > IORDY=on/off, tPIO={min:240,w/IORDY:120}, PIO modes: mode3 mode4 > > Same here. It also does UDMA 0-2 which your hdparm doesn't show. > > >#time dd if=/dev/hda of=/dev/null bs=4096 count=16384 > >0.01user 0.38system 2:13.61elapsed 0%CPU (0avgtext+0avgdata 0maxresident)k > >0inputs+0outputs (85major+11minor)pagefaults 0swaps > >#time dd if=/dev/sda of=/dev/null bs=4096 count=16384 > >0.00user 0.20system 0:13.79elapsed 1%CPU (0avgtext+0avgdata 0maxresident)k > >0inputs+0outputs (81major+11minor)pagefaults 0swaps > > I use: hdparm -m16 -c1 -d1 -u1 -X34 -W1 /dev/hd[ac] > (-m16 is redundant though) > > 0.05user 58.40system 1:15.72elapsed 77%CPU (0avgtext+0avgdata 0maxresident)k > 0inputs+0outputs (84major+12minor)pagefaults 0swaps > > Not sure about that, but a bonnie comparison against a 1GB Maxtor (hda): > -------Sequential Output-------- ---Sequential Input-- --Random-- > -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- > Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU > IBM 100 846 95.0 10626 48.1 3535 37.9 6463 70.4 14288 54.4 1622.1 30.8 > Maxtor 100 3871 41.8 3863 15.5 1543 12.9 4032 43.5 6188 20.9 798.0 14.6 > > -George > > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.rutgers.edu > Please read the FAQ at http://www.tux.org/lkml/ >
Cheers, Andre Hedrick The IDE-FNG for Linux The APC UPS Specialist for Linux
http://www.dyer.vanderbilt.edu/server/udma/ http://www.dyer.vanderbilt.edu/server/apcupsd/apcupsd-3.5.0.bin.tar.gz
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/
| |