On Tue, 17 Oct 2006, Levi Bard wrote:
>> If I have a long-running process, say "dd", is there any way to find out
>> which block of stdin it's reading?
>
> From dd(1):
> Sending a USR1 signal to a running `dd' process makes it print I/O
> statistics to standard error and then resume copying.
>
> $ dd if=/dev/zero of=/dev/null& pid=$!
> $ kill -USR1 $pid; sleep 1; kill $pid
>
> 18335302+0 records in 18335302+0 records out 9387674624 bytes
> (9.4 GB) copied, 34.6279 seconds, 271 MB/s
Duh, thanks. Shoulda checked the man page first. Should be a SMOP to
change a series of measurements evenly spaced in time into data evenly
spread throughout the disk.
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