It has keyboard, usb, hdmi, wifi, ethernet and other processes. But apparently prioritizing my program above them really does not affect how often it visits my program.

I have about 250 nS of jitter on my output signal.

-----Original Message----- From: Seth Mattinen
Sent: Thursday, February 22, 2018 5:58 PM
Subject: Re: [AFMUG] OT Raspberry PI

On 2/22/18 3:36 PM, wrote:
Had the command syntax wrong.
But got nice to work.  Have to sudo if you use negative nice numbers.
It made zero difference in my jitter. I went from 19 to –20 on nice and no change.

nice really only helps prioritize (or not) compared to other running

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