delete operator to delete elements in an array, or an entire array. Consider the following example:Example 3.18. noncumulative-vfsreads.stp
global reads
probe vfs.read
{
reads[execname()] ++
}
probe timer.s(3)
{
foreach (count in reads)
printf("%s : %d \n", count, reads[count])
delete reads
}delete reads statement clears the reads array within the probe.Note
global reads, totalreads
probe vfs.read
{
reads[execname()] ++
totalreads[execname()] ++
}
probe timer.s(3)
{
printf("=======\n")
foreach (count in reads-)
printf("%s : %d \n", count, reads[count])
delete reads
}
probe end
{
printf("TOTALS\n")
foreach (total in totalreads-)
printf("%s : %d \n", total, totalreads[total])
}reads and totalreads track the same information, and are printed out in a similar fashion. The only difference here is that reads is cleared every 3-second period, whereas totalreads keeps growing.