Messages in this thread | | | Date | Sat, 29 Nov 2003 00:48:03 +0100 | From | Eduard Hasenleithner <> | Subject | Better performance with pdc20376 compared to SiI 3112 |
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Hello.
Although I like the SiI 3112 due it's open specs I found that the somehow "closed" pdc20376 promise chip performs essentially better with the new GPL drivers on a non-tweaked 2.6.0-test11 kernel :( With SiI 3112 I get about 16MB/s, with pdc20376 54MB/s, which is most likely the maximum harddisk performance of my seagate drive.
So what is the status of the siimage driver? Can I expect it to improve in further kernel releases?
On a further note I found that no /proc/ide nodes are allocated for the siimage driver. What can be the reason for this?
Below this section I show output from dd and hdparm in order to give information about my setup.
=== test with promise pdc20376 === boundary:~ # time dd if=/dev/sda of=/dev/null bs=1048576 count=1024 1024+0 records in 1024+0 records out real 0m18.441s user 0m0.004s sys 0m3.428s
=== reboot, test with SiI 3112 ==== boundary:~ # time dd if=/dev/hde of=/dev/null bs=1048576 count=1024 1024+0 records in 1024+0 records out real 1m2.666s user 0m0.003s sys 0m4.009s
=== second try, just to be sure === boundary:~ # time dd if=/dev/hde of=/dev/null bs=1048576 count=1024 1024+0 records in 1024+0 records out real 1m2.648s user 0m0.006s sys 0m3.884s
=== output of hdparm === boundary:~ # hdparm -I /dev/hde /dev/hde:
ATA device, with non-removable media Model Number: ST3120026AS Serial Number: 3JS1X69W Firmware Revision: 3.56 Standards: Used: ATA/ATAPI-6 T13 1410D revision 2 Supported: 6 5 4 3 Configuration: Logical max current cylinders 16383 65535 heads 16 1 sectors/track 63 63 -- CHS current addressable sectors: 4128705 LBA user addressable sectors: 234441648 LBA48 user addressable sectors: 234441648 device size with M = 1024*1024: 114473 MBytes device size with M = 1000*1000: 120034 MBytes (120 GB) Capabilities: LBA, IORDY(can be disabled) bytes avail on r/w long: 4 Queue depth: 1 Standby timer values: spec'd by Standard R/W multiple sector transfer: Max = 16 Current = ? Recommended acoustic management value: 254, current value: 0 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 Cycle time: min=120ns recommended=120ns PIO: pio0 pio1 pio2 pio3 pio4 Cycle time: no flow control=240ns IORDY flow control=120ns Commands/features: Enabled Supported: * READ BUFFER cmd * WRITE BUFFER cmd * Host Protected Area feature set * Look-ahead * Write cache * Power Management feature set Security Mode feature set * SMART feature set * FLUSH CACHE EXT command * Mandatory FLUSH CACHE command * Device Configuration Overlay feature set * 48-bit Address feature set SET MAX security extension * DOWNLOAD MICROCODE cmd * SMART self-test * SMART error logging Security: supported not enabled not locked not frozen not expired: security count not supported: enhanced erase Checksum: correct
=== ls -R /proc/ide (where is hde?) === /proc/ide: . .. drivers hda hdc ide0 ide1 via
/proc/ide/ide0: . .. channel config hda mate model
/proc/ide/ide0/hda: . cache driver identify model smart_thresholds .. capacity geometry media settings smart_values
/proc/ide/ide1: . .. channel config hdc mate model
/proc/ide/ide1/hdc: . .. capacity driver identify media model settings
=== lspci -v (snipped) === 00:07.0 RAID bus controller: CMD Technology Inc Silicon Image SiI 3112 SATARaid Controller (rev 02) Subsystem: CMD Technology Inc: Unknown device 6112 Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 19 I/O ports at ec00 [size=8] I/O ports at e800 [size=4] I/O ports at e400 [size=8] I/O ports at e000 [size=4] I/O ports at dc00 [size=16] Memory at dffffe00 (32-bit, non-prefetchable) [size=512] Expansion ROM at dff00000 [disabled] [size=512K] Capabilities: [60] Power Management version 2
00:0d.0 RAID bus controller: Promise Technology, Inc. PDC20376 (rev 02) Subsystem: Promise Technology, Inc.: Unknown device 6620 Flags: bus master, 66Mhz, medium devsel, latency 32, IRQ 19 I/O ports at bc00 [size=64] I/O ports at b800 [size=16] I/O ports at b400 [size=128] Memory at dfffe000 (32-bit, non-prefetchable) [size=4K] Memory at dffc0000 (32-bit, non-prefetchable) [size=128K] Capabilities: [60] Power Management version 2
Thanks for any hints!
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