10 Sep
2004
10 Sep
'04
4:04 p.m.
Alexander Franca wrote:
Recording:
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/dev/hda:
Timing buffer-cache reads: 820 MB in 2.01 seconds = 408.43 MB/sec
Timing buffered disk reads: 10 MB in 3.38 seconds = 2.96 MB/sec
Without Record:
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/dev/hda:
Timing buffer-cache reads: 852 MB in 2.01 seconds = 423.94 MB/sec
Timing buffered disk reads: 8 MB in 3.00 seconds = 2.66 MB/sec
Recording again:
---------------------------------------------------------------------
/dev/hda:
Timing buffer-cache reads: 812 MB in 2.00 seconds = 405.25 MB/sec
Timing buffered disk reads: 10 MB in 3.66 seconds = 2.74 MB/sec
Runing Jack
---------------------------------------------------------------------
/dev/hda:
Timing buffer-cache reads: 1028 MB in 2.00 seconds = 512.80 MB/sec
Timing buffered disk reads: 10 MB in 3.26 seconds = 3.07 MB/sec
Thats it?
[]'s
Alexander
And this looks like your problem. Your disk throughput is so low that
you're probably not getting the bandwidth that you need. Probably DMA is
not turned on.
man hdparm will tell you more, but a very basic test setting you could
try could be something like:
hdparm -A 1 -m 16 -a 64 -c 1 -d 1 -u 1 /dev/hda
(read man hdparm to understand the meaning of each of these.)
Try setting -a up and down and look at the change in throughput. If
setting it lower doesn't hurt then push it down. If raising it helps
push it up. I don't know what type of drive you have but you should be
able to get anywhere from 15MB/S up to 50MB/S depending on your PC,
drive controller and the drive.