Re: CPU hammered on Dell Inspiron with new install.

["Dotan Cohen" <dotancohen@gmail.com>]

2008/4/28 Andrea Gozzi <as.gozzi@vp44.net>:
> On Sun, 2008-04-27 at 18:25 +0300, Dotan Cohen wrote:
>  >  Where should I begin troubleshooting?
>
>  Run "top" and check for processes waiting to do I/O on disks.
>  Also, check your hdparm settings since having DMA/UDMA disables makes
>  reads A LOT slower
>
>  Andrea
>

Thanks. Top doesn't show anything excessive, and it looks like DMA is
the culprit:

hardy@hardy-laptop:~$ sudo hdparm /dev/sda
[sudo] password for hardy:

/dev/sda:
 IO_support    =  0 (default)
16-bit)
 HDIO_GET_UNMASKINTR failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_KEEPSETTINGS failed: Inappropriate ioctl for device
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 9729/255/63, sectors = 156301488, start = 0
hardy@hardy-laptop:~$ sudo hdparm -d1 /dev/sda

/dev/sda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
hardy@hardy-laptop:~$ sudo hdparm /dev/sda

/dev/sda:
 IO_support    =  0 (default)
16-bit)
 HDIO_GET_UNMASKINTR failed: Inappropriate ioctl for device
 HDIO_GET_DMA failed: Inappropriate ioctl for device
 HDIO_GET_KEEPSETTINGS failed: Inappropriate ioctl for device
 readonly      =  0 (off)
 readahead     = 256 (on)
 geometry      = 9729/255/63, sectors = 156301488, start = 0
hardy@hardy-laptop:~$


What can I do to remedy that?

Dotan Cohen

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A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?