Re: Normal buildtime for a kernel?

[Oliver Korpilla <Oliver.Korpilla@gmx.de>]

Lennart Sorensen schrieb:
> > root@bender:~# hdparm -tT /dev/sda
> >
> > /dev/sda:
> > Timing cached reads:   2188 MB in  2.00 seconds = 1093.07 MB/sec
> > HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate 
> > ioctl for device
> > Timing buffered disk reads:   96 MB in  3.03 seconds =  31.69 MB/sec
> > HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate 
> > ioctl for device
>
>
> Hmm, rather slow drives by the looks of it.  I would expect most modern
> drives to do around 50MB/s not 30MB/s.  I get 44MB/s on my 120GB WD SATA
> drive.  It looked like it was a seagate that you are using.  I wonder if
> they have gotten better, since I recall reading some not so nice
> opinions on Seagate SATA drives by Hedrick.

To exclude DMA as possibilty:

/dev/sda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device
root@bender:~# hdparm -tT /dev/sda

/dev/sda:
 Timing cached reads:   2124 MB in  2.00 seconds = 1060.04 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate 
ioctl for device
 Timing buffered disk reads:   96 MB in  3.01 seconds =  31.88 MB/sec
HDIO_DRIVE_CMD(null) (wait for flush complete) failed: Inappropriate 
ioctl for device

With kind regards,
Oliver Korpilla