More on "Warning: Starting 10 extra processes takes > 2 sec"

[Tal, Ido]

Hi,

I really liked the "tail -f" trick in the documentation for turning parallel 
into a queue system/batch manager:

echo >jobqueue; tail -f jobqueue | parallel
echo my_command my_arg >> jobqueue

However, I wanted to use exactly the number of cores I had, so I changed 
"parallel" in the above to "parallel -j+0"
Upon submitting my first job to jobqueue ( echo "touch a" >> jobqueue ) I got:

Warning: Starting 10 extra processes takes > 2 sec.
Limiting to 1 jobs in parallel.

The machine is not under any load. I've compiled the latest version of 
parallel, "parallel-20101222". I do not get this warning when I use "parallel 
-j+0" in a less fancy way (no tail -f). So, this seems like a bug...

Please write back if there is any other info needed.

And, thanks! It's a great program which is helping me a lot.

Ido