bugGNU Parallel - Bugs: bug #60213, --limit "io X" executes...


bug #60213: --limit "io X" executes when io is >X and not <X

Submitted by:  None
Submitted on:  Thu 11 Mar 2021 03:21:12 PM UTC  
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open

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Thu 11 Mar 2021 03:21:12 PM UTC, original submission:  

The --limit "io X" option does not behave as expected and seems to not run jobs when the machine is mostly idle.

According to the documentation and comments on --limit:

sub limit($) {
    # Returns:                                                                                                                                                         
    #  0 = Below limit. Start another job.                                                                                                                             
    #  1 = Over limit. Start no jobs.                                                                                                                                  
    #  2 = Kill youngest job        

However, line 6459 of the parallel script (release 20210222) in function limit() has:

                   exit ($max < '$limit')' $io_file;

which returns a '1' if $max < $limit (True) and hence jobs don't get run.

Should the test be:
                   exit ($max > '$limit')' $io_file;



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