Latency question

I have been getting an error "Unexpected real time delay" upon startup of Linuxcnc, forever. I have read about the Latency testing and have done it several times, but I never changed any parameters.

My Base Thread = 100000 in my .ini file.

I just ran the latency test and it (Base Thread) came back at 27540. Can anyone tell me what my Base Thread should be in the .ini file based on this latest test.

Thanks

Maybe try playing with the two .INI settings below. Pretty sure the comments were added by PCNCCONF but this is stright out of my .INI file and increasing them solved problems for me on a Mesa 7i76e

Rodw,

Here is a snippet of my .ini file settings:

[TRAJ]
AXES = 3
COORDINATES = X Y Z
LINEAR_UNITS = inch
ANGULAR_UNITS = degree
CYCLE_TIME = 0.010
DEFAULT_VELOCITY = 5.0
MAX_LINEAR_VELOCITY = 5
[EMCIO]
EMCIO = io
CYCLE_TIME = 0.100
TOOL_TABLE = tool.tbl

[AXIS_0]
TYPE = LINEAR
HOME = 0.0
MAX_VELOCITY = 5.0
MAX_ACCELERATION = 10.0
STEPGEN_MAXACCEL = 15.0
SCALE = 1600
FERROR = 0.08
MIN_FERROR = 0.05
MIN_LIMIT = -0.065
MAX_LIMIT = 25.625
HOME_OFFSET = -.125
HOME_SEARCH_VEL = -0.5
HOME_LATCH_VEL = -0.02
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 1
HOME_FINAL_VEL = .1

[EMCMOT]
EMCMOT = motmod
COMM_TIMEOUT = 1.0
COMM_WAIT = 0.010
BASE_PERIOD = 100000
SERVO_PERIOD = 1000000

This is what the machine control came set up with. Right now my max rapid speed is 300ipm.

Thanks,
Dave

There has to be an answer to this. I just reran the latency test after playing with some video settings and the highest I saw the base thread go was around 14500 and most of the time it was below 10000 EXCEPT when I opened some picture files and then it would spike above 200,000. I believe that it must have something to do with the video card (which is Nvidea).

Thought maybe I had fixed something as the first time I opened Linuxcnc, I didn't get any error, so i shut it down and restarted Linuxcnc again and the error message came back.

This is a dual boot machine and I had to go back into Windows XP to change anything. I never use Windows and I am not connected to internet with this machine. Also when running a toolpath, I am not doing anything else with the PC.

I am definitely not good with Ubuntu and getting around in it, so if there is something I can check, please tell me how (exactly).

Thanks for your help

Did you see this?

wiki.linuxcnc.org/cgi-bin/wiki.pl?Troubl...d_ATI_graphics_cards

The Nvidia driver has known issues with latency

Yes I did, but not sure what to do...