Performance Tuning: Latency

Use this procedure to tune your AccelePort device driver for reduced latency. For general information about latency, see About Latency.

Enabling Latency

To enable reduced-latency mode, edit the file /kernel/drv/dgdxb.conf and add one or more lines of the form:

instanceN_use_interrupts=1

where N is the instance number of the adapter (printed at driver-load/boot time).

Configuring the Latency Interrupt Period

To enable reduced-latency mode, edit the file /kernel/drv/dgdxb.conf and add one or more lines of the form:

instanceN_interrupt_period=X;

where N is the instance number of the adapter (printed at driver-load/boot time) and X is the desired interrupt period in milliseconds. The default interrupt period is 10 milliseconds (1/100 second).