gputilttest(1) gputilttest(1) NAME gputilttest - Test reliability of GPU with repeated runs of Tilt pro- gram SYNOPSIS gputilttest [#_of_minutes] [GPU_#] DESCRIPTION gputilttest is a Python script to test the reliability of a GPU for computations in IMOD by running Tilt repeatedly and comparing the results on each run to the previous run. Any nonzero difference is counted as a failure. The program alternates between 10 runs with no local alignments and 10 runs with local alignments. It is important to test a GPU before using it for generating tomograms. The GPU should be tested again if it is moved to a new machine, if the NVIDIA drivers are changed, or if there is a major upgrade to the oper- ating system. There are two optional arguments. The first argument can be used to set the number of minutes to run the test; the default is 1 minute, which is generally sufficient to flush out problems. Fractional values may be entered. The second argument is the GPU number, numbered from 1. The default is to use the only GPU or the fastest GPU. FILES The program creates a number of files in the current directory, and removes all of them when it exits, or when it is interrupted with Ctrl- C. BL3DEMC 4.3.7 gputilttest(1)