If cpu seems to be idle, the tool latencytop probably can give you some clue. It's developed for OpenSolaris but Solaris 10 should work too (with glib 2.14 installed). You can get a copy of v0.1 at http://opensolaris.org/os/project/latencytop/
To use latencytop, open a terminal and start "latencytop -s -k 2". The tool will show a window with activities that are being blocked in the system. Then you can launch your application to reproduce the performance problem in another terminal, switch back to latencytop window, and use "<" and ">" to find your process. The list will tell you which function is causing the delay. After a couple minutes you may press "q" to exit from latencytop. When it ends, a log file /var/log/latencytop.log will be created. It includes the stack trace of waiting for IO, semaphore etc. when latencytop was running. If you post the log here, I can probably extract a list of worst delays in ZFS source code, and other experts may comment. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
