Fwd: realtime performance of adl_pci9118

---------- Forwarded message ----------
From: wicky Zhang <wicky.zhang_at_gmail.com>
Date: Oct 13, 2005 9:22 PM
Subject: Re: realtime performance of adl_pci9118
To: Michal Dobes <dobes_at_tesnet.cz>
Cc: rtai_at_rtai.org



 do you use cmd->flags|=TRIG_WAKE_EOS ?
> If yes, then after every sample is generated interrupt and 50
> kinterrupts/s
> will kill any system.

  I have not do that operation, but would you tell me how to check this
setting
  or reset it?

At first, don't measure odd number of the channels, this slow down
> driver. So measure 6 channels and ignore data from the one.
> If you use TRIG_WAKE_EOS then one channel at 33 k is worse
> case that 6 channels at 10 kHz sampling.
> Check if the driver uses bus mastering or not. This can you see
> in the system logs after driver loading. Message like:
> comedi0: adl_pci9118: board=pci9118dg, b:s:f=0:17:0, io=0xd800, 0xd400,
> irq=12, bus master.
>
> Michal

  thanks
 regards,
 wicky