Hello, Across on 'storage-discuss' I'm trying to analyse a problem involving the Solaris iSci target, and thought that this would be a good opportunity to try DTrace.
Having read some blog posts, I decided the easiest way to start would be to use Brendan Gregg's script here: http://www.brendangregg.com/DTrace/procsystime This runs fine, and I have posted the results from running it on a couple of my systems: http://mail.opensolaris.org/pipermail/storage-discuss/2008-October/006458.html http://mail.opensolaris.org/pipermail/storage-discuss/2008-October/006459.html The 'Syscall Counts' look ok, but I do not understand the 'Elapsed Times' statistics. These claim to be in nano Seconds. Nano is 10^-9 or 0.000000001 So, using the figure from the first test in the second link above, that makes the "Elapsed Times Total" of 2194329238161 correspond to 2194.329238161 seconds. But I only had the script running for about 90 seconds, before I did a Ctrl-C. I don't understand that! Am I missing something? Can someone please explain? Next Question: I thought (in my naivety), that I would be able to look up further information on the syscalls here: http://docs.sun.com/app/docs/doc/819-2241/6n4huc7i6?a=expand ... but nothing there on 'kaio', 'recv', 'pollsys' and 'lwp_park'. Are these 'syscalls' documented any where? Many thanks, in anticipation of some advice. I'm trying to learn some DTrace, but as you can see, I'm currently at an early stage in that learning :-) Best Regards Nigel Smith -- This message posted from opensolaris.org _______________________________________________ dtrace-discuss mailing list dtrace-discuss@opensolaris.org
