example io language kernel

doc/workload/example.kernel.txt

+r = getgrouprank -1;
+s = getgroupsize -1;
+f = 13;
+
+b = 4194304;
+
+open f;
+
+writeat f, b, (r*b);
+
+sync f;
+
+readat f, b, ((s-r-1)*b);
+
+close f;
+
+exit 0;

doc/workload/meta.txt

+1 0 -1 example.kernel.txt