Re: suggestions for udb

[Danilo Godec <danci kibla org>]

On Tue, 7 Dec 1999, Shane Sturrock wrote:

> > This is especially due to bad IDE support (I have a 164SX), which means
> 
> I thought that was fixed?
> 
> IDE performance on the LX is excellent.

What is excellent? On my system things look like that:

[root@alfonz /root]# hdparm /dev/hda

/dev/hda: 
 multcount = 16 (on) 
 I/O support = 1 (32-bit) 
 unmaskirq = 0 (off) 
 using_dma = 1 (on) 
 keepsettings = 0 (off) 
 nowerr = 0 (off) 
 readonly = 0 (off) 
 readahead = 8 (on) 
 geometry     = 8894/15/63, sectors = 8404830, start = 0

[root@alfonz /root]# hdparm -Tt /dev/hda

/dev/hda: 
 Timing buffer-cache reads:  128 MB in 2.61 seconds =49.12 MB/sec
 Timing buffered disk reads:  64 MB in 10.82 seconds = 5.91 MB/sec

[root@alfonz /root]# bonnie 
File './Bonnie.1751', size: 104857600 
Writing with putc()...done 
Rewriting...done 
Writing intelligently...done
Reading with getc()...done 
Reading intelligently...done 
Seeker 1...Seeker 2...Seeker 3...start 'em...done...done...done.... 
-------Sequential Output-------- ---Sequential Input-- --Random--
-Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks---
K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU  /sec %CPU
 4548 26.3  5233 12.0  2343 11.1  4541 28.1  5653  8.4  79.3  1.3 

/dev/hda is a Seagate ST34321A, 4103MB w/128kB Cache, CHS=8894/15/63,
(U)DMA and is capable of ~10M/sec on a decent Celeron machine.

I do have ide patches for CY82C693 controller, which do improve the
situation (without'em things were far worse). I wouldn't call these
results excellent anyway. 

I'm open for suggestions and trying out things... :)

       D.