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#! /usr/bin/env stap
global reads, writes, total_io
probe vfs.read.return {
reads[execname()] <<< bytes_read
total_io[execname()] <<< bytes_read
}
probe vfs.write.return {
writes[execname()] <<< bytes_written
total_io[execname()] <<< bytes_written
}
# print top 10 IO processes every 5 seconds
probe timer.s(5) {
printf ("%16s\t%10s\t%10s\n", "Process", "KB Read", "KB Written")
foreach (name in total_io @sum- limit 10)
printf("%16s\t%10d\t%10d\n", name,
@sum(reads[name])/1024, @sum(writes[name])/1024)
delete reads
delete writes
delete total_io
print("\n")
}
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