Re: [gentoo-performance] gentoo-performance

[Christopher Bergström]

lnxg33k wrote:

> Chris wrote:
>
>> funny that a "high performance linux" has a dead performance ML... LOL
>
> <snip>
>
> Could be evidence that the "ricer" crowd doesn't read? (i.e. they post
> to more generic lists or use other mediums instead of something
> specific for their needs)

Since we're all here and saying hello.. Someone have a performance 
question or a good tip to add to the list?

The one thing that first pops to my head is some hdparm results I've had 
and if maybe it's either my kernel setup or how I'm testing with hdparm...

Anyhow..

Raptors on SATA (Model Number:       WDC WD360GD-00FNA0) (-c3 -u1 -A1 
-W1 -d1 -a256 -M254 -m16 -X70 )
Kernel config
CONFIG_SCSI_SATA_SIL=y

There's an alternative driver, but haven't tested it...

hdparm -tT /dev/hde

/dev/hde:
 Timing cached reads:   956 MB in  2.00 seconds = 477.02 MB/sec
 Timing buffered disk reads:  116 MB in  3.03 seconds =  38.26 MB/sec

hdparm -tT --direct /dev/hde

/dev/hde:
 Timing O_DIRECT cached reads:   244 MB in  2.01 seconds = 121.26 MB/sec
 Timing O_DIRECT disk reads:  124 MB in  3.01 seconds =  41.17 MB/sec

Laptop 7k60 (Model Number:       HTS726060M9AT00)
hdparm -tT /dev/hdc

/dev/hdc:
 Timing cached reads:   1980 MB in  2.00 seconds = 989.94 MB/sec
 Timing buffered disk reads:  118 MB in  3.04 seconds =  38.81 MB/sec


hdparm -tT --direct /dev/hdc

/dev/hdc:
 Timing O_DIRECT cached reads:   364 MB in  2.02 seconds = 180.54 MB/sec
 Timing O_DIRECT disk reads:  120 MB in  3.04 seconds =  39.42 MB/sec


I also can't set the raptors into UDMA6 tried -X70 with no luck..

Any suggestions?

Thanks

C.
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