[mythtv-users] How much horespower for frontend?
James Pifer
jep at obrien-pifer.com
Wed Sep 27 14:27:57 UTC 2006
On Tue, 2006-09-26 at 19:30 -0500, Jason wrote:
> You can certainly use the other box, but I'm pretty sure something is
> going on with your IO. For example, you are only using 16bit IO, you
> should be using 32 bit for the most performance. Cranking on unmask IRQ
> will help to. Give that a shot, make your settings look like the below
> and hdparm -tT again.
>
> /dev/hda:
> multcount = 16 (on)
> IO_support = 1 (32 bit)
> unmaskirq = 1 (on)
> using_dma = 1 (on)
> keepsettings = 0 (off)
> readonly = 0 (off)
> readahead = 256 (on)
>
>
> hdparm -u1 -c1 -d1 /dev/hda
>
Doesn't seem to have changed much:
[root at mythtv ~]# hdparm -u1 -c1 -d1 /dev/hda;hdparm -u1 -c1 -d1 /dev/hdb;hdparm -u1 -c1 -d1 /dev/hdc;hdparm -u1 -c1 -d1 /dev/hdd
/dev/hda:
setting 32-bit IO_support flag to 1
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
/dev/hdb:
setting 32-bit IO_support flag to 1
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
/dev/hdc:
setting 32-bit IO_support flag to 1
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
/dev/hdd:
setting 32-bit IO_support flag to 1
setting unmaskirq to 1 (on)
setting using_dma to 1 (on)
IO_support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
[root at mythtv ~]# hdparm -tT /dev/hda; hdparm -tT /dev/hdb; hdparm -tT /dev/hdc; hdparm -tT /dev/hdd;
/dev/hda:
Timing cached reads: 628 MB in 2.01 seconds = 313.07 MB/sec
Timing buffered disk reads: 146 MB in 3.02 seconds = 48.40 MB/sec
/dev/hdb:
Timing cached reads: 628 MB in 2.00 seconds = 313.33 MB/sec
Timing buffered disk reads: 66 MB in 3.01 seconds = 21.91 MB/sec
/dev/hdc:
Timing cached reads: 628 MB in 2.01 seconds = 312.64 MB/sec
Timing buffered disk reads: 76 MB in 3.05 seconds = 24.88 MB/sec
/dev/hdd:
Timing cached reads: 620 MB in 2.00 seconds = 309.79 MB/sec
Timing buffered disk reads: 74 MB in 3.00 seconds = 24.66 MB/sec
[root at mythtv ~]#
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