When using dropwatch.stp to troubleshoot packet drops, it is often done
with additional troubleshooting such as packet captures and collections
of other commands like "ethtool -S" or "netstat -s".
To correspond traffic loss events across the various output, these
should all have timestamps.
Add ctime timestamp to dropwatch to enable this. Update documentation to
show example timestamp collection.
git://sourceware.org / systemtap.git / commit